2. Hosted by Ms. D!

3. 100 200 400 300 400 Water 1 MC Water 2 MC Water 3Water 4 300 200 400 200 100 500 100

4. The cohesive forces in water are also called a. Covalent bonds b. Hydrogen bonds c. Ionic bonds d. Adhesion B

5. 100 In a water molecule… a. The oxygen has a partial positive charge b. The hydrogens have a partial negative charge c. The oxygen has a full negative charge d. The hydrogens have a partial positive charge D

6. 100 The kind of covalent bond where the electrons are not shared equally because one of the atoms “hogs” the electrons. What is a POLAR covalent bond?

7. 100 In a water molecule, the atom that gets a partial negative charge. What is oxygen?

8. 200 TRUE or FALSE: Hydrogen bonds are attractive forces that hold water molecules close to each other. TRUE

9. 200 TRUE or FALSE: Non-polar substances are generally hydrophobic. TRUE

10. 200 The property of water responsible for creating a meniscus in a cylinder of water. What is adhesion?

11. 200 The property of water that allows fish to stay alive at the bottom of a pond in the winter. What is water expands when frozen?

12. 300 In the following image of a cellular protein, the area indicated by the arrow is most likely … (Remember! Cells are comprised mainly of water!) a. Hydrophilic b. Hydrophobic c. Non-polar d. Metallic A

13. 300 What property of water allows trees to transport water from the roots all the way up to the leaves? a. Cohesion b. Adhesion c. Evaporation d. All of the above D

14. 300 TRUE or FALSE: Hydrogen bonds are stronger than covalent bonds. FALSE

15. 300 The charge of the ion dissolved by water below What is positive?

16. 400 A paper clip can float on water because of a. Surface tension b. Cohesion c. Hydrogen bonds d. All of the above D

17. 400 When water is heated, most of the energy that the water initially absorbs is used to… a. Break the covalent bonds between the hydrogen and oxygen atoms in water b. Make the water evaporate c. Break the hydrogen bonds between the water molecules d. Raise the temperature of the water C

18. 400 The name for the sphere of water molecules surrounding the ion below. What is a hydration sphere?

19. 400 When you make Kool-Aid, the Kool-Aid mix is the… What is Solute?

20. 500 In humans, one of the ways that we maintain homeostasis is by keeping our temperature at about 98.6 degrees Fahrenheit. Water helps us to keep our temperature constant because it has a. Ionization b. Cohesion c. High specific heat d. Adhesion C

21. 500 Water is a very lightweight molecule. It’s so light, in fact, that we would expect it to be a gas at room temperature. The only reason that water exists as a liquid at room temperature is because of a. Adhesion b. Cohesion c. Ionization d. Thermal capacity B

22. 500 Classify EACH of the following as either hydrophobic or hydrophilic: Glass: Wax: Oil: Cotton: Glass: philic; Wax: phobic; Oil: phobic; Cotton: philic

23. 500 The reason why water forms large round droplets as it falls from a leaky sink. What is cohesion?