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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 Choice
Why does ice float?
As water freezes, the molecules spread out decreasing its density.
As water freezes, it takes up more hydrogen from the atmosphere, causing it to have a greater buoyancy.
As water freezes, air gets trapped making it more dense
As water freezes, it takes up more oxygen from the atmosphere, causing it to be more dense
- 4. Multiple Choice
Water is a universal solvent because it...
It can be found anywhere
It freezes when it gets cold
Floats when frozen
Dissolves more substances than anything else
- 5. Multiple Choice
Which of the following is LEAST likely to dissolve in water?
nonpolar fats and oils
polar sugar molecules
salt made of a positive sodium ion and a negative chloride ion
all of the substances will dissolve easily in water
- 6. Multiple Choice
Why does water move from the roots to the leaves of plants?
Water is pushed by solutes
Capillary action pulls the water molecules up like a chain
Water is pulled by gravity
Water cannot move up roots to leaves
- 7. Multiple ChoiceA(n) ______ is a substance with a pH less than 7AcidAlkalineBaseBuffer
- 8. Multiple ChoiceA(n) _______ is a substance with a pH greater than 7.BaseAcidBufferWater
- 9. Multiple ChoiceWhat is the only substance with a neutral pH of 7?MilkOrange JuiceWaterBlood
- 10. Multiple ChoiceWater is essential for life. Its special properties make water the single most important molecule in plant life. Which of the following properties of water enables it to move from the roots to the leaves of plants?Water expands as it freezes.Water is an excellent solvent.Water exhibits cohesive behavior.Water is able to moderate temperature.
- 11. Multiple ChoiceWhy does ice stay at the top of oceans instead of sinking to the bottom?Ice is colder than liquid water.Ice is less dense than liquid water.Ice is more dense than liquid water.Ice is warmer than liquid water.
- 12. Multiple ChoiceA florist places a bouquet of white carnations in water containing blue dye. After a time, the flowers turn blue. What process helped the carnations to change color?Specific heatSurface tensionCohesion and adhesion of water moleculesFormation of covalent bonds between hydrogen and oxygen molecules
- 13. Multiple ChoiceMany fish and aquatic plants can survive a cold winter because the layer of ice that forms at the top of the lake insulates the water below and prevents the lake from freezing solid. What unique property of water contributes to this effect?Water absorbs heat when it evaporates and forms a gasWater expands and becomes less dense when it freezes.Water molecules completely separate into ions in solutions.Water forms hydrogen bonds with ions and other polar substances.
- 14. Multiple Choice
Which term refers to water having a slightly positive and a slighty negative charge on its ends?
cohesion
surface tension
polar
adhesion
- 15. Multiple ChoiceSurface tension is caused by ...strong cohesion between water moleculesstrong adhesion between the water moleculescondensationwater cycle
- 16. Multiple Choice
The hydrogen atoms in a water molecule are ________________ charged.
not
negatively
neutrally
positively
- 17. Multiple Choice
What molecule is this?
calcium
hydrogen
helium
water
- 18. Multiple Choice
A paperclip floating on water is an example of what property of water?
capillary action
surface tension
universal solvent
specific heat index
- 19. Multiple Choice
Water drops being attracted to each other is an example of ____________.
capillary action
adhesion
specific heat index
cohesion
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