Question
3. What will happen if the earth is bigger than its current size?
A. It will not be able to sustain life
B. It will not have a moon on its orbit
C. It will move farther away from the sun
D. It will attract materials more strongly towards its center
4. Which of the following statements is true about the earth's subsystem?
A. Most of the liquid water found in earth's surface is potable
B. If the earth had been bigger than its current size, it would have less gravity
C. It takes 500 seconds from light from the sun to reach the surface of the earth
D. Earth is the only planet in the solar system having water in three phases: solid, liquid
and gas.
5. Unlike other planets in the solar system, earth holds an atmosphere which has an
essential function to life. What substance in the stratosphere is responsible for
absorbing high-energy radiation from the sun?
A. Ozone
B. Methane
C. Carbon dioxide
D. Diatomic oxygen
6. One of the four subsystems of the earth is the atmosphere. Which of these is the
correct sequence of atmospheric layer from the bottom up?
A. stratosphere-mesosphere-troposphere-themmosphere
B. troposphere-themosphere- stratosphere-mesosphere
C. stratosphere- troposphere-thermosphere-mesosphere
D. troposphere-stratosphere-mesosphere-thermosphere
Answer
3. A. It will not be able to sustain life.
4. D. Earth is the only planet in the solar system having water in three phases: solid, liquid and gas.
5. A. Ozone.
6. B. troposphere-themosphere- stratosphere-mesosphere.