8. Which statement does BEST describe the greenhouse effect?
A. The process of the atmosphere keeping the Earth's surface
dense.
B. The process of the atmosphere keeps us from floating into
space.
C. The process of the atmosphere reflecting all of the Sun's heat
back into space.
D. The process of the atmosphere trapping the sun's radiation,
and making the Earth warm and livable for humans.
9. Which statement does BEST describe global warming?
A. An increase in the earth's atmospheric temperatures due to
an increase in the greenhouse effect.
B. An increase in the earth's atmospheric and oceanic
temperatures caused by stronger greenhouse effect due to
human activities.
C. An increasing temperature phenomenon that affects all
countries due to increased human activity that emit
greenhouse gases.
D. An increasing temperature phenomenon that affects the world
due to an increase of human population that destroys the
atmosphere.
10. Why is human activity a contributor to increased carbon
dioxide concentration in the atmosphere?
1. Burning of fossil fuels, improper waste disposal, and wasting
of resources are some activities humans do that emits carbon
dioxide into the atmosphere.
II. Destruction of earth's natural resources, disregarding the
importance of energy conservation are some activities
humans do that contribute to the increase of carbon dioxide
concentration in the atmosphere,
III. Humans are naturally caring for the environment; humans
take care of the natural resources that we use to survive.
IV. Human activity greatly affects the condition of the
atmosphere. If human activity destroys the atmosphere there
will be problems with the environment.
A. I, II, IV
C. I, II
B. I, II, III
D. I only
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