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- 1. Multiple Choice
What two elements make up water?Helium and oxygenHydrogen and oxygenhelium and carbonoxygen and carbon - 2. Multiple ChoiceWhat word describes when water is attracted to other substances?cohesionadhesioncapillary actionsurface tension
- 3. Multiple ChoiceAttractions between the negative Oxygen atom of one water molecule and the positive Hydrogen atom of another water molecule are calledCovalent bondsIonic bondsPolar bondsHydrogen bonds
- 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 ChoiceWhich end of the water molecule has a slightly positive charge?the oxygen endthe hydrogen endboth ends are slightly positiveneither end is positive
- 6. Multiple ChoiceWater is a universal solvent because it...It can be found anywhereIt freezes when it gets coldfloats when frozenDissolves most substances
- 7. 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
- 8. 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.
- 9. Multiple ChoiceSmall insects can walk across the surface of calm water. Their feet push the surface of the water down slightly, somewhat like a person walking across a trampoline, but they do not break the surface. What is the best explanation for why this happens?The insects are light enough so that 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 feetThe insects' feet are non-polar, so they are repelled by the polar water molecules and are pushed away from the water's surfaceThe insects are small enough to see the individual water molecules, so they are able to step carefully from one molecule to the next
- 10. Multiple ChoiceThe fact that ice floats on liquid water is due to the fact that water's solid is ___________ than it's liquid formless polarmore polarless densemore dense
- 11. Multiple ChoiceHow much of Earth's water is salt water?50%66%75%97%
- 12. Multiple ChoiceThe tightness across the surface of water that enables paper clips to float is ____________.adhesioncapillary actionsurface tensionpolarity
- 13. Multiple ChoiceWhich statement explains why water molecules stick together?both sides are negativeone side has a positive charge and the other side has a negative chargeone side has a negative charge adn the other side has a neutral chargeboth sides are positive
- 14. Multiple ChoiceWhat is the most powerful agent in weathering and erosion?watersoilgrasswind
- 15. Multiple ChoiceWhen a molecule has an opposite electrical charge on each end, it is known as what?cohesionpolar moleculehydrogen bondsolution
- 16. Multiple ChoiceWhen water molecules stick easily to other water molecules, this is called what?cohesionadhesionsolutionpolar molecule
- 17. Multiple ChoiceWater beads up on the surface of a penny because of what property?AdhesionHigh Surface TensionUniversal SolventChanges in Density
- 18. Multiple Choice
The ability of water molecules to stick to each other, creating surface tension is called:
Cohesion
Adhesion
Insulation
Ph
- 19. Multiple Choice
The fact that water can stick to other substances is called:
Ph
Adhesion
Cohesion
Insulation
- Answer choicesTagsAnswer choicesTags