Question

question 6 of 10
which best explains how greenhouse gases affect earth?
a. they decrease wind currents, cooling off the planet.
b. they trap heat in the atmosphere, warming the planet.
c. they cause volcanoes to release warmth into the atmosphere.
d. they cool the planet by reflecting heat from the sun.

Explanation:

Greenhouse gases (like carbon dioxide) allow sunlight to enter Earth's atmosphere. But they prevent some of the heat (infra - red radiation) from escaping back into space. This is known as the greenhouse effect. Option A is incorrect as greenhouse gases do not decrease wind currents to cool the planet. Option C is wrong because greenhouse gases do not cause volcanoes to release warmth. Option D is incorrect as greenhouse gases do not reflect heat from the sun to cool the planet.

Answer:

B. They trap heat in the atmosphere, warming the planet.