Question

reading evaluation

1. which definition best matches the meaning of elevation in paragraph 3?

a. increasing the amount of something
b. a particular side of a building
c. the action of being elevated
d. height above sea level

1. atmospheric pressure is measured with a-

a. sphygmomanometer.
b. weather vane.
c. barometer.
d. hygrometer.

1. air has weight because it has-

a. molecules.
b. pressure.
c. thinness.
d. mass.

1. which sentence from the text helps explain why water molecules move around easier at higher elevations?

a. “in airplanes, artificial air pressure is created so people can breathe normally.” (paragraph 4)
b. “at higher elevations, decreased atmospheric pressure is being exerted on the surface of the water, and the molecules move more freely.” (paragraph 5)
c. “anything with mass has weight.” (paragraph 1)
d. “low - pressure systems lead to wind, cloudiness, and precipitation while high - pressure systems lead to calm, fair weather.” (paragraph 2)

1. air pressure on the surface of water keeps water molecules-

a. happy.
b. moving.
c. missing electrons.
d. contained.
writing evaluation

1. water boils at a lower temperature at higher altitudes. because of this, experts say that food must be cooked longer when using boiling water in an area with a higher altitude. discuss why you think this might be.

Explanation:

1. The word "elevation" commonly refers to the action of being elevated.
2. A barometer is the instrument used to measure atmospheric pressure.
3. Air has weight because it has mass; mass is what gives an object weight according to the laws of physics.
4. The sentence about decreased atmospheric pressure at higher elevations explains why water molecules move more freely there.
5. Air pressure on water surface keeps water molecules contained. For the writing - evaluation question, at higher altitudes, the lower boiling point of water means it has less heat energy. So, food takes longer to cook as it needs more time to reach the necessary temperature for proper cooking.
6. At higher altitudes, the atmospheric pressure is lower. This causes water to boil at a lower temperature. Since the boiling water has less heat energy (because of the lower temperature), food cooked in it needs more time to absorb enough heat to be fully cooked.

Answer:

1. C. The action of being elevated
2. C. barometer
3. D. mass
4. B. "At higher elevations, decreased atmospheric pressure is being exerted on the surface of the water, and the molecules move more freely."
5. D. contained
6. At higher altitudes, lower atmospheric pressure leads to a lower boiling - point of water. Since the boiling water has less heat energy, food cooked in it requires more time to reach the proper cooking state.