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What describes a water molecule's ability to stick to other materials?

The strong polar bond between water molecules creates

Water has an amazing ability to adhere (stick) to itself and to other substances. The property of cohesion describes the ability of water molecules to be attracted to other water molecules, which allows water to be a sticky liquid 1) Which property describes the water molecule's ability to stick to another water molecule? a) cohesive. b) adhesive. c) polar. d) surface tension. 2) Which property describes the water molecule's ability to stick to other materials? a) cohesive. b) adhesive. c) polar. d) surface tensio Describes a molecule with opposite charges on opposite ends. Adhesion. Tendency of water to stick to other substances. Cohesion. Tendency of molecules of the same kind to stick to one another. Surface tension. The tightness across the surface of water that is caused by the polar molecules pulling on one another _____ _____ describes how the surface of water acts like a skin and seals up quickly after being disturbed. this allows water striders and Jesus Christ lizard appear to walk on water. Cohesion _____________ is the property of water that causes water molecules to stick to each other Cohesion describes water's _____. A) attraction to other substances B) attraction to itself C) ability to dissolve most substances D) rate of cooling and heatin

SOLUBILITY/Mixtures/Separation Technique

Cohesion in water is a property of water that makes its molecules attracted to each other. A water molecule is made of one oxygen atom bonded to two hydrogen atoms. The molecule has an unbalanced. The ability of water molecules to stick to other water molecules is an example? Cohesion. Why does ice float in liquid water? Hydrogen bonds stabilize and keep the molecules of ice farther apart than the water molecules of liquid water. If a solution has a pH of 7, this means that Since water is highly cohesive, if you put water in soil, the soil will take in all of the water. Activity Two: Investigating Surface Tension Surface tension is a property of a liquid that allows the surface to resist force. This means the surface of a liquid resists the weight of objects. Procedures: Fill a bowl ¾ full with tap water. Sprinkle about a teaspoon of ground black pepper in the bowl A solvent is simply a substance that can dissolve other molecules and compounds, which are known as solutes. A homogeneous mixture of solvent and solute is called a solution, and much of life's chemistry takes place in aqueous solutions, or solutions with water as the solvent. Because of its polarity and ability to form hydrogen bonds, water.

Properties of Water Flashcards Quizle

  1. Cohesion holds hydrogen bonds together to create surface tension on water. Since water is attracted to other molecules, adhesive forces pull the water toward other molecules
  2. Water molecules stick to other water molecules. This property is called cohesion. Hydrogen bonds form between adjacent water molecules because the positive charged hydrogen end of one water molecule attracts the negative charged oxygen end of another water molecule
  3. Frozen water floats on liquid water. Water covers most of the Earth's surface and retains a large amount of heat. Water molecules stick to each other through hydrogen bonds. Water cools very rapidly
  4. If you could see molecules of water and how they act, you would notice that each water molecule electrically attracts its neighbors.Each has two hydrogen atoms and one oxygen atom, H20.The extraordinary stickiness of water is due to the two hydrogen atoms, which are arranged on one side of the molecule and are attracted to the oxygen atoms of other nearby water molecules in a state known as.
  5. g a hydrogen bond. This hydrogen bond is the reason behind many of water's special properties, such as the fact that it's denser in its liquid state than in its solid state (ice floats on water). We'll look closer at these special properties later
  6. 11) _____ is the property of water that causes water molecules to stick to other substances. Ex. Glass of water sweats and sticks to a coaster 12) A mixture forms when one substance, the _____, dissolves into the solvent. The property that describes the dissolving ability of water is_____
  7. Javier Garcia 10/15/20 Period 3 The Properties of Water Polarity: Describes a molecule with oppositely charged sides or poles Cohesion: The attraction of one water molecule to another water molecule. Adhesion: The attraction of a water molecule to another substance Capillary action: Defined as the ability of water to move through fine pores against the force of gravity

Water has some unusual properties due to its hydrogen bonds. One property is cohesion, the tendency for water molecules to stick together. The cohesive forces between water molecules are responsible for the phenomenon known as surface tension Each water molecule has both positive and negative electrically charged parts. As a result, water molecules tend to stick to one another; that adhesion is why water forms rounded droplets on a.. Structure of Water Water is a simple molecule consisting of one oxygen atom bonded to two different hydrogen atoms. Because of the higher electronegativity of the oxygen atom, the bonds are polar covalent (polar bonds). The oxygen atom attracts the shared electrons of the covalent bonds to a significantly greater extent than the hydrogen atoms

properties of water Flashcards Quizle

Water is a polar molecule, and thus can adhere to different surfaces; thus, adhesion is the correct answer here. Cohesion is close, as cohesion describes the ability of water to stick to itself due to its polarity. We want the property that allows water to stick to other surfaces, not to itself 4. Hydrogen bonds form between adjacent water molecules because the _____ charged hydrogen end of one water molecule attracts the _____ charged oxygen end of another water molecule. 5. Water molecules stick to other water molecules. This property is called _____. 6

Water has many properties that are critical to maintaining life. It is polar, allowing for the formation of hydrogen bonds, which allow ions and other polar molecules to dissolve in water. Therefore, water is an excellent solvent. The hydrogen bonds between water molecules give water the ability to hold heat better than many other substances The dynamic interactions of water molecules. Individual H 2 O molecules are V-shaped, consisting of two hydrogen atoms (depicted in white) attached to the sides of a single oxygen atom (depicted in red). Neighboring H 2 O molecules interact transiently by way of hydrogen bonds (depicted as blue and white ovals).. Strong linkages—called covalent bonds—hold together the hydrogen (white) and. •Water molecules are made up of two hydrogen atoms and one oxygen atom, held together by polar covalent bonds. The polarity of the water molecule is what gives water its unique properties. These properties are important to living systems. •Water is the closest thing to a universal solvent that there is Adhesion is the ability of water molecules to stick to other molecules. Cohesion is the ability of water molecules sticking to one another This occurs with water and a glass tube. A convex meniscus occurs when the molecules have a stronger attraction to each other than to the container, as with mercury and glass. A flat meniscus occurs with water in some types of plastic tubes; tubes made out of material that water does not stick to

Cohesion describes water's _____

  1. Cohesion is the attraction between molecules of the same substance. For ex. when water molecules tend to stick together. Cohesion is what allows spiders and other insects to walk ON water
  2. How is the Surface Tension of Water Affected by Soap? Introduction: A property of water is it has the ability to stick to itself. Water molecules are attracted to each other and they want to group together. This is called cohesion. In a glass of water, the water molecules on the surface do not have neighboring molecules above and, because of this, these molecules have stronger attractive.
  3. 15 Questions Show answers. Surface tension is the property of water in which... water molecules at the surface tend to stick together. water spills easily. water tends to be see-through. Describe COHESION. Water molecules attracted to other substances. Water molecules climbing upwards against the force of gravity
  4. answer choices. Frozen water floats on liquid water. Water covers most of the Earth's surface and retains a large amount of heat. Water molecules stick to each other through hydrogen bonds. Water cools very rapidly. Tags: Question 9. SURVEY. 30 seconds

5. Water molecules stick to other materials due to its polar nature. This property is called _____. 6. _____ is the tendency for fluids to resist flow. _____ water is more viscous than warmer water, allowing floating organisms to use less energy to keep from sinking The attraction that causes water and other liquids to form drops on thin films is called ________________. This is also water's ability to be attracted to other water molecules. Q. Water beads up on the surface of a penny because of this property. Q. Plant roots are able to absorb water because of. Q. Paper clips are able to float on. Cohesion is the attraction of like molecules to one another. In this case, the like molecules are the H20 molecules in the water drops. Surface tension is a special term we use to describe the cohesion between water molecules. Water's cohesion and surface tension are special because of hydrogen bonds Describe the difference in ability of water, oil and alcohol to adhere (or stick) to the glass, the wax paper and the paper towel surface. Knowing that similar types of material stick well to each other (i.e. polar sticks to polar), use your your knowledge of each test liquid and its relative polarity to estimate the polarity of each surface. 5. Hydrogen bonds form between adjacent water molecules because the _____ charged hydrogen end of one water molecule attracts the _____ charged oxygen end of another water molecule. 6. Water molecules stick to other materials due to its polar nature. This property is called _____

Similarly to surface tension, this revolves around the idea that molecules of water 'stick' together. If you put a very fine tube into a beaker of water you will see that some of the water travels a short way up the tube; this is called capillary action and is caused by the water clinging to the sides of the tube and to other molecules of water. Water's polarity gives it the ability to dissolve both ionic compounds and other polar molecules, such as sugar. It is for this reason that water is often called the 'universal solvent' . Being the universal solvent enables water to carry substances such as essential ions (electrolytes) into and out of the cell Adhesion is the ability of water to stick to other substances. For example, water can stick to the side of a swimming pool. Cohesion is the ability of water molecules to stick to themselves (H-bonds). We can also see that water has a high water tension, a measure of how hard it is to break the surface of water. In this portion of the lab, you. 5. Attraction To Other Polar Molecules The property of cohesion allows liquid water to have no tension on the surface. Cohesion is what we call the ability of water to attract other water molecules. It is one of its most important properties. Water has a high polarity, and it gives it the ability to being attracted to other water molecules A weak link occurs between the negatively charged oxygen atom of one water molecule and the positively charged hydrogen atoms of a neighbouring water molecule. This weak link is called a hydrogen bond. The polarity of the water molecule can also cause it to be attracted to molecules of other polar substances

Properties of Water Earth Sciences Quiz - Quiziz

  1. Sticky, Wet Water. Water has some unusual properties due to its hydrogen bonds. One property is cohesion, the tendency for water molecules to stick together.The cohesive forces between water molecules are responsible for the phenomenon known as surface tension.The molecules at the surface do not have other like molecules on all sides of them and consequently, they cohere more strongly to those.
  2. Water, a substance composed of the chemical elements hydrogen and oxygen and existing in gaseous, liquid, and solid states. It is one of the most plentiful and essential of compounds.A tasteless and odourless liquid at room temperature, it has the important ability to dissolve many other substances. Indeed, the versatility of water as a solvent is essential to living organisms
  3. In many ways, water behaves very differently from other compounds. These properties are directly related to the microscopic structure of water, and more specifically to the shape of the molecule and its polar nature, and to the intermolecular forces that hold water molecules together. There are about 55,5 mol of water in 1 L

Wonderful Water - Science Worl

Water molecules stick to each other, forming the 'skin' on ponds and droplets. The solid form floats on the liquid form. At room temperature water is a liquid, when most of the molecules closely. Water Polarity. When the two hydrogen atoms bond with the oxygen, they attach to the top of the molecule rather like Mickey Mouse ears.This molecular structure gives the water molecule polarity, or a lopsided electrical charge that attracts other atoms.. The end of the molecule with the two hydrogen atoms is positively charged The bent shape of the water molecule is critical because the polar O-H bonds do not cancel one another and the molecule as a whole is polar. Figure 2 below illustrates the net polarity of the water molecule. The oxygen is the negative end of the molecule, while the area between the hydrogen atoms is the positive end of the molecule stick together). • Adhesion - water molecules are attracted other types of molecules (i.e., water molecules stick to other surfaces). • Capillary action - water can be drawn up a thin tube. Capillary action makes use of both the cohesive and adhesive properties of water (e.g., water going from the roots of a tree to the leaves. The Water Molecule -- Chemical and Physical Properties . Water is a chemical compound and polar molecule, which is liquid at standard temperature and pressure. It has the chemical formula H 2 O, meaning that one molecule of water is composed of two hydrogen atoms and one oxygen atom. Water is found almost everywhere on earth and is required by all known life

Water Molecules: Property # 1. Temperature and Physical State:. Water remains in a liquid state over the range of temperatures. The melting and boiling points of water are higher than expected when compared with other molecules of similar size e.g. NH 3, CH 4.Table 7-1 details some physical properties of water and these are compared with other molecules of similar molecular size Water molecules are more attracted to each other than they are to other materials, so they generate a force to stay together called surface tension. If the force that the insect foot makes on the water, is less than the surface tension of the water, the bug will float Similarly, if we heat a volume of water above 100 degrees Celsius, or 212 degrees Fahrenheit, water changes its phase into a gas called water vapor. Changes in the phase of matter are physical changes, not chemical changes. A molecule of water vapor has the same chemical composition, H2O, as a molecule of liquid water or a molecule of ice Glossary Of Water Terminology. Water is a transparent, inorganic, odorless, and almost colorless substance existing in liquid, solid, or gaseous states, and composed of two chemical elements; oxygen and hydrogen. It contains two hydrogens and one oxygen atom and is represented by the chemical formula H2O

Structure of Water Molecule and Properties of Water (Case

Figure 1: Water Chemistry. Water molecules are made of two hydrogens and one oxygen. These atoms are of different sizes and charges, which creates the asymmetry in the molecular structure and leads to strong bonds between water and other polar molecules, including water itself. Water is the Universal Solvent As a polar molecule, water. We are going to talk about why water molecules really like to stick to each other and why that causes water to act the way it does. Lesson Background and Concepts for Teachers Surface Tension. Figure 3. Within the body of water, cohesive forces acting on a water molecule pull in all directions and so cancel out Adhesive bonding is a joining technique used in the manufacture and repair of a wide range of products. Along with welding and soldering, adhesive bonding is one of the basic joining processes.In this technique, components are bonded together using adhesives.The broad range of types of adhesives available allows numerous materials to be bonded together in products as diverse as vehicles. Water ( H 2 O) is polar because of the bent shape of the molecule. The shape means most of the negative charge from the oxygen on side of the molecule and the positive charge of the hydrogen atoms is on the other side of the molecule. This is an example of polar covalent chemical bonding. When solutes are added to water, they may be affected by. The soap disrupts the cohesion of the water molecules, causing the water to form sheets (through which the image can be seen relatively easily) rather than drops. By the way, if we come back to our original drop of water on the wax paper, we can break the surface tension by adding soap, and we'll see that the drop changes into a flat puddle

Adhesion is the tendency of dissimilar particles or surfaces to cling to one another (cohesion refers to the tendency of similar or identical particles/surfaces to cling to one another).. The forces that cause adhesion and cohesion can be divided into several types. The intermolecular forces responsible for the function of various kinds of stickers and sticky tape fall into the categories of. The surfactants in detergents improve water's ability to wet things, spread over surfaces, and seep into dirty clothes fibers. Surfactants do another important job too. One end of their molecule is attracted to water, while the other end is attracted to dirt and grease

Stuck Like Glue (Air Pressure Trick) Science Experimen

This polarity of water molecules causes them to attract each other like little magnets: the slightly positive side is attracted to the slightly negative side of an adjacent water molecule. This attraction of one water molecule to another is called cohesion, which is the reason water molecules stick together and form a skin at the. The water-fearing end of the surfactant is made up of hydrocarbon chains. A hydrocarbon is a molecule that is made of hydrogen and carbon. The chains love oil and grease and will try to stay away from water. The water-loving end is known as the hydrophilic end. We learned hydro- is a Greek root meaning 'water'

A hydrogen bond (or H-bond) is a primarily electrostatic force of attraction between a hydrogen (H) atom which is covalently bound to a more electronegative atom or group, and another electronegative atom bearing a lone pair of electrons—the hydrogen bond acceptor (Ac). Such an interacting system is generally denoted Dn-H···Ac, where the solid line denotes a polar covalent bond, and the. The phosphate heads are thus attracted to the water molecules of both the extracellular and intracellular environments. The lipid tails, on the other hand, are uncharged, or nonpolar, and are hydrophobic—or water fearing. A hydrophobic molecule (or region of a molecule) repels and is repelled by water. Some lipid tails consist of. To turn solid ice into liquid water, for example you have to push the water molecules inside further apart and break apart the framework (or crystalline structure) that holds them together. So while ice is melting (in other words, during the change of state from solid water to liquid ice), all the heat energy you supply is being used to. In chemistry, hydrophobicity is the physical property of a molecule that is seemingly repelled from a mass of water (known as a hydrophobe). ( Strictly speaking, there is no repulsive force involved; it is an absence of attraction.) [citation needed] In contrast, hydrophiles are attracted to water. Hydrophobic molecules tend to be nonpolar and, thus, prefer other neutral molecules and nonpolar. The hydrophobic (water-fearing) part of a soap molecule, its long, nonpolar hydrocarbon chain, does not interact with water molecules. The hydrocarbon chains are attracted to each other by dispersion forces and cluster together, forming structures called micelles. In these micelles, the carboxylate groups form a negatively-charged spherical.

Cohesion in Water: Definition & Example - Video & Lesson

Adhesion refers to the tendency of water molecules to be attracted, or ''stick'', to other substances. This is a result of the covalent bond between the two hydrogen atoms and the one oxygen atom. If the molecules are of different kinds (ie: Water and Glass), then it is called adhesion. If they are of the same kind, it is called cohesion.The tendency of molecules of the same kind to stick. Water molecules stick to other water molecules because? Wiki User. ∙ 2012-09-03 16:21:42. Best Answer. Copy. They are joined by hydrogen bonds. Wiki User. 2012-09-03 16:21:42. This answer is Water molecules want to cling to each other. At the surface, however, there are fewer water molecules to cling to since there is air above (thus, no water molecules). This results in a stronger bond between those molecules that actually do come in contact with one another, and a layer of strongly bonded water (see diagram) These strong hydrogen bonds allow water molecules to stick together very well and move down the string into the bottom cup. When like molecules grab each other, it's called cohesion. You moistened the string to help the water molecules stick together and stick to the string. Water molecules can stick to other materials, too

Biology Test Chp 2-3 Flashcards Chegg

Water (H 2 O, HOH) is the most abundant molecule on Earth's surface, composing of about 70% of the Earth's surface as liquid and solid state in addition to being found in the atmosphere as a vapor. It is in dynamic equilibrium between the liquid and vapor states at standard temperature and pressure.At room temperature, it is a nearly colorless with a hint of blue, tasteless, and odorless liquid Adding soap lowers the water's surface tension so the drop becomes weaker and breaks apart sooner. Making water molecules stick together less is what helps soaps clean dishes and clothes more. Certain parts of a molecule will be attracted to other parts of different molecules and will cause them to stick together. Since all of the molecules are the same, this attraction will be very strong. A water droplet on a desk, for example, is made of many tiny water molecules that are attracted to each other. This is called cohesion. Molecules. Water has the ability to be a liquid, solid or gas depending on the temperature at which it is found. Each molecule of water is made up of 2 hydrogen molecules and 1 oxygen molecule bonded together. Water is a . polar molecule. because the oxygen molecule has a slightly negative charge and the hydrogen molecules have a slightly negative charge A water molecule has two hydrogen-oxygen bonds. The geometry of a water molecule (the H-O-H bond angle is 104.5°) is nonsymmetrical, hence the vector sum of the dipole moments is not equal to zero and water is a polar molecule. Polar molecules will attract other polar molecules because of their net dipole moments

groundwater_lab_report

  1. water molecules to maintain strong cohesion, adhesion, and surface tension. •Water has a tendency to stick to many other substances, like these spider webs or pine needles. •Is the ability of a liquid to climb against gravity on the surface of something else
  2. dragging other water molecules with them (cohesion). Water level in the tube rises until the downward force of gravity becomes equal to than the adhesion and cohesion of water. Fig. 3-16: Capillarity in different sized glass tubes. In a narrow tube, the molecules at the edges have fewer other water molecules to drag up the tube than in a large.
  3. Water (Figure 1.23) is described as a solvent because of its ability to solvate (dissolve) many, but not all, molecules. Molecules that are ionic or polar dissolve readily in water, but non-polar substances dissolve poorly in water, if at all. Oil, for example, which is non-polar, separates from water when mixed with it

Solvent properties of water (article) Khan Academ

A water molecule is comprised of one oxygen atom with two hydrogen atoms bonded and has the molecular formula H 2 O. The oxygen and hydrogen atoms share electrons, but since oxygen atom is more electronegative, which means it has a stronger pull on the electrons than hydrogen atoms, the electrons spend more time near the oxygen atom.This results in a partial negative charge around the oxygen. Amphipathic molecules accomplish this remarkable feat in a deceptively simple way. Phospholipids - the type of amphipathic molecule that makes up most cell membranes - are able to form a stable membrane because their head is attracted to water molecules, while their tails are repelled by them. That means that phospholipids can form a stable membrane that is impermeable to most.

After exploring possible explanations with students, explain the concept of surface tension: Atoms make up molecules and molecules like to stick together. Water molecules are made of two hydrogen atoms and one oxygen atom (H 2 0). Because the water molecules want to stick together, they make an invisible layer or skin on the surface of the water Because atoms of opposite charges are actively attracted to each other, different parts of water molecules are attracted to both positive and negative ions and molecules. On a large scale, this means that water will stick to many substances. Water molecules also stick to each other for the same reason, because all water molecules are polar Water molecules are constantly on the move. If they are moving fast enough they become a gas. A gas is a physical state of matter where the molecules are far apart and moving very quickly. But, because of the hydrogen bonds, as water molecules come together they stick to one another for a small, but significant amount of time

These opposite charges make water a polar molecule. The negative oxygen of one water molecule is attracted to the positive hydrogen of another molecule forming a hydrogen bond. In other words water likes to stick to itself. Water sticking to water is called cohesion. Water sticking to something else is called adhesion. 5 As an example of the processes depicted in this figure, consider a sample of water. When gaseous water is cooled sufficiently, the attractions between H 2 O molecules will be capable of holding them together when they come into contact with each other; the gas condenses, forming liquid H 2 O. For example, liquid water forms on the outside of a cold glass as the water vapor in the air is cooled. Carbon has the ability to make virtually endless strings of atoms. If one could look at a molecule of almost any plastic, for example, a long chain of carbon atoms attached to each other (and to other atoms as well) would be evident. Carbon chains can be even more complicated. Some chains have side chains hanging off them Water will move upwards inside a very narrow glass tube (capillary tube) for a short distance. Water does this because it is sticky. Water molecules are electrically charged and dipolar (one end or pole of the molecule is negatively charged, the other pole positively charged)

2.2E: Water's Cohesive and Adhesive Properties - Biology ..

ADVERTISEMENTS: 1. Water is highly cohesive and adhesive: Because of hydrogen bonds, water molecules develop strong intermolecular attraction between them. This is called cohesion. When water form hydrogen bonds with other substance, the attraction is called adhesion. Due to cohesion and adhesion, seeds swell and germinate; ascent of sap and capillary movement of water takes [ Water consists of two hydrogen atoms and one oxygen molecule connected by a covalent bond to form a charged H20 molecule. The biggest similarity between these two substances is that their molecules are charged, making them reactive. This is why salt dissolves in water Water, a polar molecule Ethane. a non ar molecu The negative oxygen of one water molecule is attracted to the positive hydrogen Of another molecule forming a hydrogen bond. In other words water likes to stick to itself. water sticking to water is called cohesion. Water sticking to something else is called adhesion. Cohesion — intermolecular.

Water quiz 2 States of Matter Quiz - Quiziz

Describe the mechanisms that organisms use to maintain solute and water balance. ENE-2.E.1 Passive transport is the net movement of molecules from high concentration to low concentration without the direct input of metabolic energy. ENE-2.E.2 Passive transport plays a primary role in the import of materials and the export of wastes. ENE-2.E. The integrity of tissues is also dependent on the adhesion, by CAMs, of cells to cells and cells to the Extracellular Matrix. Extracellular matrix (ECM) All cells in solid tissue are surrounded by extracellular matrix. Both plants and animals have ECM. The cell wall of plant cells is a type of extracellular matrix

Sticky Water: Surface Tension Exploratoriu

A. Incorrect - Water expands when it freezes, and this answer has nothing to do with density. B. Incorrect - water in a lake freezes from the top down. It would have to be more dense than liquid water to freeze at the bottom first. C. Correct - water on the top of the lake freezes first, due to the low density of frozen water. This allows. In this respect, silver has a coefficient of heat conduction of 100, whereas other materials are ranked lower. These include copper (92), iron (11), water (0.12), and wood (0.03) The force of cohesion causes the water molecules to hold on to one another and the force of adhesion causes the water molecules to stick to the passageways in the coffee filter. Because the passageways the water will travel through in the coffee filter are so small, the adhesion forces are strong enough to overcome gravity and cause. In scientific notation, the charge on an electron is -1.6 10 -19 C and the charge on a proton is +1.6 10 -19 C. To determine the number of excess electrons or unbalanced protons, given the charge on an object, use the equations below. Exercises using these relationships are provided on the Charge It! Math Worksheet On the other hand, the central oxygen atom in H2O has a single bond with each of the hydrogen atoms, but it also has 2 lone pairs. These push the hydrogen atoms away from their opposite sides of the atom. That's why the three atoms in each water molecule don't make a straight line

Since water molecules are polar molecules, meaning they have a positive side and a negative side, the charges of one molecule attract the opposite charges of other molecules, which is called cohesion (the attraction of one molecule to another). Adhesion is the attraction of the molecules to molecules of other substances Molecule, a group of two or more atoms that form the smallest identifiable unit into which a pure substance can be divided and still retain the composition and chemical properties of that substance. Learn more about the properties and structures of molecules in this article The molecules in liquid water are closer together than they are in ice. Compared to other substances, water is unusual in this way. The molecules in the liquid are moving past one another. The hydrogen end of one water molecule is attracted to the oxygen end of another but only for a short time because they are moving