1. Which of the following terms best describes air?

Question

1. Which of the following terms best describes air? (1 point)
element
compound
mixture
none of the above
2. What is the lowest layer of the atmosphere? (1 point)
thermosphere
troposphere
stratosphere
mesosphere
3. The tropopause is ____. (1 point)
the boundary between tropical and polar air masses
the boundary between the troposphere and the stratosphere
the layer of high ozone concentration
the boundary between Earth’s surface and atmosphere
4. When does the summer solstice occur in the Northern Hemisphere? (1 point)
June 21
March 21
September 21
December 21
5. All matter is composed of atoms or molecules that have energy of motion, also known as ____. (1 point)
potential energy
solar energy
kinetic energy
radiation
6. When air transfers energy to a cooler object, what happens to the air temperature? (1 point)
It increases.
It decreases.
It stays the same.
It fluctuates.
7. Which process involves mass movement within a substance? (1 point)
conduction
convection
radiation
reflection
8. On average, how much of the sun’s energy that reaches Earth’s outer atmosphere is reflected back into space? (1 point)
10 percent
20 percent
30 percent
50 percent

Answer 1

1. Which of the following terms best describes air? (1 point)

(0 pts) element

(0 pts) compound

(1 pt) mixture

(0 pts) none of the above

0 /1 point

2. What is the lowest layer of the atmosphere? (1 point)

(0 pts) thermosphere

(1 pt) troposphere

(0 pts) stratosphere

(0 pts) mesosphere

0 /1 point

3. The tropopause is ____. (1 point)

(0 pts) the boundary between tropical and polar air masses

(1 pt) the boundary between the troposphere and the stratosphere

(0 pts) the layer of high ozone concentration

(0 pts) the boundary between Earth’s surface and atmosphere

0 /1 point

4. When does the summer solstice occur in the Northern Hemisphere? (1 point)

(1 pt) June 21

(0 pts) March 21

(0 pts) September 21

(0 pts) December 21

1 /1 point

5. All matter is composed of atoms or molecules that have energy of motion, also known as ____. (1 point)

(0 pts) potential energy

(0 pts) solar energy

(1 pt) kinetic energy

(0 pts) radiation

0 /1 point

6. When air transfers energy to a cooler object, what happens to the air temperature? (1 point)

(0 pts) It increases.

(1 pt) It decreases.

(0 pts) It stays the same.

(0 pts) It fluctuates.

1 /1 point

7. Which process involves mass movement within a substance? (1 point)

(0 pts) conduction

(1 pt) convection

(0 pts) radiation

(0 pts) reflection

1 /1 point

8. On average, how much of the sun’s energy that reaches Earth’s outer atmosphere is reflected back into space? (1 point)

(0 pts) 10 percent

(0 pts) 20 percent

(1 pt) 30 percent

(0 pts) 50 percent

0 /1 point

Answer 2

1.mixture

2.troposphere

3.the boundary between the troposphere and the stratosphere

4. June 21

5.kinetic energy

6.it decreases

7.convection

8. 30 percent

Answer 3

Crossman makes several nice pump air rifles that would do well. Places like Wal-mart, Gander Mountain, and Bass Pro have good selections of air rifles starting at about $40. CO2 air guns are mostly best for semi-auto firing. Many pneumatic pumps are sold with a 4x30 scope included. No pellet rifle I've ever used has had any recoil whatsoever.

Answer 4

1. compound

2. stratosphere?

3. ?

4. June 21

5. potential

6. ?

7. convection?

8. 20





Take it as you will!