Question

match the terms with their definition.

1. cohesion
2. capillary action
3. adhesion
4. polarity
5. hydrogen bond
6. surface tension
7. specific heat

a. tendency to stick to other substances
b. tightness caused by the pulling of water molecules on each other
c. the amount of heat needed to raise the temp of a substance
d. weak bonds formed between water molecules
e. tendency to stick to other water molecules
f. uneven distribution of charges in a molecule
g. tendency to climb up due to cohesion & adhesion

1. circle the letter of each sentence that is not true about waters structure.

a. water is made up of atoms bonded to form molecules.
b. water contains half as many hydrogen atoms as oxygen atoms.
c. water molecules tend to push away from each other.
d. the chemical formula for water is h₂o.

1. draw and label a molecule of water.
2. one side of the water molecule has a positive charge, while the other side has a negative charge. what do the charges say about the molecule?

a. water is a polar molecule.
b. water is a nonpolar molecule.

1. what kind of bonds form between 2 molecules of water?

a. close bonds
b. hydrogen bonds

1. how does capillary action help animals and plants?

in animals, water in the ____________ helps in the transport of nutrients against/with gravity. (circle one)
in plants, capillary action helps the plant transport ____________ from the roots to the leaves.

Explanation:

1. Cohesion is the tendency to stick to other water molecules, so 1 - e.
2. Capillary action is the tendency to climb up due to cohesion & adhesion, so 2 - g.
3. Adhesion is the tendency to stick to other substances, so 3 - a.
4. Polarity is uneven distribution of charges in a molecule, so 4 - f.
5. Hydrogen bond are weak bonds formed between water molecules, so 5 - d.
6. Surface tension is tightness caused by the pulling of water molecules on each other, so 6 - b.
7. Specific heat is the amount of heat needed to raise the temp of a substance, so 7 - c.
8. Water contains twice as many hydrogen atoms as oxygen atoms. So the false statement is b.
9. A molecule with opposite - charged sides is polar, so a.
10. Hydrogen bonds form between water molecules, so b.
11. In animals, water in the blood vessels helps in the transport of nutrients against gravity. In plants, capillary action helps the plant transport water from the roots to the leaves.

Answer:

1. e
2. g
3. a
4. f
5. d
6. b
7. c
8. b
9. a
10. b
11. blood vessels; against; water