Part I: Multiple Choice
Directions: Choose the letter of the best answer. Write the letter of your answer
on your Science activity notebook.
1. Which of the following is NOT a major component of the atmosphere?
A. Argon
B. Nitrogen
C. Oxygen
D. Ozone

2. Why does atmospheric temperature increase with altitude in the stratosphere?
Because
A. it is closer to the sun.
B. it is under a lot of pressure.
C. of the presence of the ozone layer.
D. it is less dense than the troposphere.

3. In the troposphere, temperature
with altitude.
A increase
B. decreases
C. stays the same
D. changes randomly

4. What is the correct sequence of the layers of the atmosphere from the ground
up to the space?
A. Troposphere - Stratosphere - Mesosphere - Thermosphere - Exosphere
B. Exosphere - Thermosphere - Mesosphere - Stratosphere - Troposphere
C. Troposphere - Stratosphere - Thermosphere - Mesosphere - Exosphere
D. Exosphere - Mesosphere - Thermosphere – Stratosphere - Troposphere

5. An Ozone (O3) becomes a "bad ozone"? When it
A becomes unstable.
C. absorbs Ultraviolet (UV) rays.
B. stays at the stratosphere
D. moves down to the ground level.
6. How are the layers of the atmosphere separated? By its
A. altitude.
B. temperature.
C. elevation.
D. distance from the Sun.

7. The two most common gases in the atmosphere are
A nitrogen and oxygen
C. nitrogen and trace gases
B. oxygen and trace gases
D. carbon dioxide and nitrogen

8. It is a blanket of air that protects the Earth from ultraviolet radiation and
meteors.
A. Atmosphere
B. Clouds
C. Water vapor
D. Wind

9. How does ionosphere influence human activities?
A. This is the region where most of the cloud formations occur and weather
conditions happened.
B. It is responsible for the formation of wind which allow humans do paragliding
and sailing
C. This is responsible for the ozone layer formation which is helpful in
maintaining the appropriate temperature on Earth.
D. It reflects radio waves back to Earth which are useful in televisions, radio,
cellphone signals and other satellite related equipment making.communication possible.

10. Which of the following help improve the amount of "good" ozone in the
Atmosphere?
A. Burning of wood
C. Use of fluorocarbons
B. Planting of trees
D. Rampant usage of plastics​