Question

Which statement explains why greenhouse gases are needed for the survival of life on Earth?

A.
Greenhouse gases are clean sources of energy.
B.
Without greenhouse gases, Earth would be too cold for life to exist.
C.
Inhaling greenhouse gases is essential for proper lung function.
D.
Greenhouse gases prevent celestial objects from entering Earth’s atmosphere.

Answer 1

B

Step-by-step explanation:

Greenhouse gases keep our planet livable by holding onto some of Earth's heat energy so that it doesn't all escape into space. This heat trapping is known as the greenhouse effect. Just as too little greenhouse gas makes Earth too cold, too much greenhouse gas makes Earth too warm.

Answer 2

B. Without greenhouse gases, Earth would be too cold for life to exist.

Step-by-step explanation:

Greenhouse gas (carbon dioxide) can reflect sunlight back to earth so it keeps the energy and make the planet warmer. Too many greenhouse gases make the planet too hot and cause global warming, but if its too little then the planet will be colder.

Colder temperature can also be dangerous as it will kill many organisms that can't resist it. The ideal condition should be in between, not too hot and not too cold.