Greenhouse effect

What happens first in the called greenhouse effect?

• Heat radiates from Earth towards space

• An amount of sun's energy is absorbed by the land and the oceans, heating the Earth

• Solar radiation reaches the Earth's atmosphere

• Some of solar radiation is reflected back to space

Sun's energy, that isn't reflected back to the space, is absorbed by the land and the ..........., heating the Earth.

The absorbed energy warms the ..................... and the ........... of the Earth.

• atmosphere

• surface

• lower atmosphere

Greenhouse gases trap the heat.

• Wrong

• Right

Heat that is trapped by greenhouse gases in the atmosphere is an amount of the heat which ........... from Earth towards space

Human activities lead on trapping extra heat, and causing the Earth's temperature to ........

• rise

• downfall

This process of greenhouse effect maintains the Earth’s temperature at around 33 degrees Celsius warmer than it would otherwise be, allowing life on Earth to exist.

• Right

• Wrong