Unit 2 Review

What is the role of the atmosphere?

• Regulate temperatures on earth

• Heat up the planet

• Block the sun's heat

• to block UV rays

What is the heat trapping mechanism inside of the atmosphere?

• Air

• carbon dioxide

• Oxygen

• Nitrogen

What happens where there is too much carbon in our atmosphere?

• the earth will get too cold

• Oceans will freeze

• the earth will get too hot

• Nothing, the earth will stay the same

Select all that apply. What increases carbon dioxide in our atmosphere?

• Forest fires

• Volcanoes

• Cars

• Photosynthesis

What would happen to CO2 levels in our atmosphere if we planted 20 million trees?

• Carbon dioxide levels would stay the same

• carbon dioxide levels would go down

• carbon dioxide levels would go up

What time of year has the lowest levels of carbon dioxide?

• Spring

• Falll

• Winter

• Summer

Why we we call the Ocean a "Carbon Sink"?

• It has a lot of water

• It has a lot of animals

• It stores large amounts of carbon dioxide

• We have polluted the water and it has changed color

Where does a tree get its mass?

• Air

• Soil

• Water

• Sun

What are the inputs into photosynthesis?

• Carbohydrates

• Oxygen

• Carbon dioxide

• Water

What are the outputs (products) of photosynthesis?

• Carbohydrates

• Nitrous oxide

• Water

• Carbon dioxide