Question

1. the tendency for water molecules to be attracted and stick to other substances is called
2. circle the letter of each sentence that is true about waters surface tension.

a. it helps some insects \skate\ across the surface of the water.
b. it refers to the tightness across the surface of the water.
c. it is caused by polar molecules repelling each other.
d. it causes raindrops to form round beads.

1. what is a curved surface in a graduated cylinder called? a
2. circle the letter of each sentence that is true about capillary action.

a. it explains how water moves against the force of gravity.
b. it is due to the attraction among molecules of water and surrounding materials.
c. it prevents water from moving through materials with pores.
d. it causes clothing to stay dry.

1. how does capillary action allow water to climb up the sides of a straw?
2. a mixture that forms when one substance dissolves another is called a(n)

the substance that does the dissolving is called a(n)

1. why can water dissolve many substances?
2. circle the letter of each substance that dissolves in water.

a. salt b. oil c. oxygen d. wax

1. a substance that hates, or \fears\ water is called
2. the amount of heat needed to increase the temperature of a certain mass of a substance by 1°c is its

18 true or false? compared with other substances, water requires a lot of heat to increase its temperature.

1. circle the letter of each sentence that is true about waters specific heat.

a. it is due to the many attractions among water molecules.
b. it makes large bodies of water heat up more quickly than nearby land.
c. it makes large bodies of water cool off more slowly than nearby land.
d. it leads to warmer air over land than over water on summer days.

1. how does the high specific heat of water affect your body?

Explanation:

1. Adhesion is the property of water molecules being attracted to other substances.
2. a. Surface - tension allows some insects to skate on water. b. It is the tight - ness across water's surface. d. It causes raindrops to form round beads. c is false as it is due to attraction, not repulsion of polar molecules.
3. A curved surface in a graduated cylinder is called a meniscus.
4. a. Capillary action enables water to move against gravity. b. It is due to attraction between water and surrounding materials. c and d are false as it helps water move through porous materials and doesn't keep clothing dry.
5. Capillary action occurs because of the adhesive forces between water and the straw material and cohesive forces within water molecules, allowing water to climb up the straw.
6. A mixture formed when one substance dissolves another is a solution. The substance that does the dissolving is a solvent.
7. Water can dissolve many substances because it is a polar molecule, and its partial charges can attract and surround ions and polar molecules of other substances.
8. a. Salt and c. Oxygen dissolve in water. Oil and wax are non - polar and do not dissolve in water.
9. A substance that hates water is called hydrophobic.
10. The amount of heat needed to increase the temperature of a certain mass of a substance by 1°C is its specific heat.
11. True. Water has a high specific heat compared to many substances.
12. a. Water's high specific heat is due to hydrogen bonding (attractions) among water molecules. c. It makes large bodies of water cool off more slowly than nearby land. b is false as water heats up more slowly, and d is false as it leads to cooler air over water on summer days.
13. The high specific heat of water helps regulate body temperature. It can absorb or release a large amount of heat without a large change in its own temperature, thus maintaining a stable internal body temperature.

Answer:

1. Adhesion
2. a. It helps some insects "skate" across the surface of the water. b. It refers to the tightness across the surface of the water. d. It causes raindrops to form round beads.
3. Meniscus
4. a. It explains how water moves against the force of gravity. b. It is due to the attraction among molecules of water and surrounding materials.
5. Due to adhesive forces between water and straw and cohesive forces within water.
6. Solution; Solvent
7. Because it is a polar molecule.
8. a. salt; c. oxygen
9. Hydrophobic
10. Specific heat
11. True
12. a. It is due to the many attractions among water molecules. c. It makes large bodies of water cool off more slowly than nearby land.
13. Helps regulate body temperature.