Assessment
Directions: Choose the letter of the correct answer. Write your answer on a separate sheet
of paper.
. Which of the following gas is the major contributor of global warming?
C. Oxygen
A. Carbon dioxide
D. Argon
B. Nitrogen
2. Which of the following correctly described the Thermosphere?
A. It is an atmospheric ozone layer.
B. It has high concentration of ionized particles.
C. It is a layer extending to a height of about 8 meters.
D. It is the coldest layer.​