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- 1. Multiple Choice
A insect like a water strider can skate along the top of a pond because:
covalent bonds result in water cohesion
hydrogen bonds result in water cohesion (surface tension)
low surface tension of water
- 2. Multiple ChoiceWhat word describes when water is attracted to other substances?cohesionadhesioncapillary actionsurface tension
- 3. Multiple Choicemolecule in which opposite ends have opposite electric chargescohesionpolar moleculehydrogen bondsolution
- 4. Multiple ChoiceWhy does ice float?As water freezes, it expands and its density decreases.As water freezes, it takes up more hydrogen from the atmosphere, causing it to have a greater buoyancy.As water freezes, air becomes trapped between the hydrogen bonds of water molecules.As water freezes, it takes up more oxygen from the atmosphere, causing it to have a greater buoyancy.
- 5. Multiple ChoiceWater is a universal solvent because it...It can be found anywhereIt freezes when it gets coldfloats when frozenDissolves most substances
- 6. Multiple ChoiceWater striders can walk across the surface of calm water. Their feet push the surface of the water down slightly, but they do not break the surface. Why?The insects are light enough so they do not break the hydrogen bonds holding the water molecules togetherThe insects actually use their wings to hover slightly above the water’s surface and they only skim it with their feet.The insect’s feet are non-polar, so they are repelled by the polar water molecules and are pushed away from the water’s surface.The insects are small enough to see the individual water molecules, so they are able to step carefully from one molecule to the next
- 7. Multiple ChoiceA general definition of cohesion is the attraction of:particles of the same substanceparticles of a different substanceparticles of both the same and different substancesparticles of neither the same or different substances
- 8. Multiple ChoiceWhich term refers to water having partial positive and a partial negative charge?cohesionsurface tensionpolarityadhesion
- 9. Multiple Choice
Capillary Action
The property of water that allows ice to float on the surface of liquid water
The property of water that allows it to dissolve polar substances
When water molecules stick to other surfaces
The property of water that allows water to move up a thin tube (or the stem of a plant) by itself
- 10. Multiple Choice
As you add drops of water to the surface of a coin, each drop sticks to the other water droplet because of ________________, and sticks to the penny because of ______________.
adhesion, cohesion
cohesion, adhesion
capillary action, specific heat
specific heat, capillary action
- 11. Multiple ChoiceWhich end of the water molecule has a slightly positive charge?the oxygen endthe hydrogen endboth ends are slightly positiveneither end is positive
- 12. Multiple ChoiceWhich of the following is LEAST likely to dissolve in water?nonpolar fats and oilspolar sugar moleculessalt made of a positive sodium ion and a negative chloride ionall of the substances will dissolve easily in water
- 13. Multiple ChoiceLarge bodies of water, such as lakes and oceans, do not quickly fluctuate in temperature. What is the reason for this phenomenon?Water is an acid.Water is a versatile solvent.Water has a high heat capacity.Water acts as a buffer.
- 14. Multiple Choice
The hydrogen atoms in a water molecule are ________________ charged.
not
negatively
neutrally
positively
- 15. Multiple Choice
When water molecules stick to each other because of the polar attraction between hydrogen and oxygen atoms, it is called ______________.
adhesion
cohesion
specific heat index
properties of water
- 16. Multiple ChoiceWhen water molecules stick together and create a trampoline like surface, it is called ___________________.surface tensioncapillary actionadhesioncohesion
- 17. Multiple Choice
The ability of water to move upward, against gravity, through small openings.
specific heat index
properties of water
capillary action
surface tension
- 18. Multiple ChoiceThe charge of oxygen in a water molecule is ______________.negativeneutralpositivebalanced
- 19. Multiple ChoiceA hydrogen atom in a water molecule will be attracted to the _____________ atom of another water molecule.oxygenhydrogennitrogenpositive
- 20. Multiple Choice
What molecule is this?
calcium
hydrogen
helium
water
- 21. Multiple Choice
What substance can water dissolve?
wax
butter
oil
salt
- Answer choicesTagsAnswer choicesTags