atmosphere

Which of the following gasses is the main part of the greenhouse effect?

• oxygen

• nitrogen

• carbon dixodie

• argon

What is the atmosphere?

• a layer of gases which surround the Earth

• a layer above the Earth which contains the ozone layer

• a layer above the Earth in which weather happens

• a layer above the Earth responsible for gravity

Which gas is most abundant in the atmosphere?

• oxygen

• nitrogen

• argon

• carbon dioxide

Why is it harder to breath at higher altitudes?

• the air is very cold

• the air pressure is lower

• the air contains more nitrogen

• the air contains more carbon dioxide

Which of the following explains why cloudy nights tend to be warmer than clear nights?

• clouds cause wind

• clouds reflect energy from the sun

• clouds store and release heat from the Earth

• clouds trap heat energy

Which of the following is a human activity that may make climate change worse?

• increasing dust from volcanic eruptions

• removing green house gasses

• using alternative energy sources

• burning fossil fuels

The Earth ozone layer

• is getting thicker

• filters harmful UV rays from the sun

• exists only over Antarctica

• traps carbon dioxide in the atmosphere

Why does the atmosphere have pressure?

• Earth gravity pulls air molecules toward the Earth

• pull from electromagnetic radiation

• ozone layer adds pressure

• greenhouse gasses have pressure

Which of these processes are responsible for heating the atmosphere?

• radiation from the clouds and convection from the ocean

• radiation from the land surface and convection from the sun

• radiation from the sun and conduction from the land surface

• radiation from the clouds and conduction from the ocean surface

Which of the following is the main source of the energy in the Earths system?

• explosive volcanic eruptions

• kinetic energy from global winds

• convection current in the mantle

• electromagnetic radiation from the sun