B4.1.7 Flashcards
1
Q
How is CO2 removed from the environment
A
It’s removed from the environment during photosynthesis
2
Q
How is CO2 released into the environment
A
Respiration
Decomposition
Burning fossil fuels
3
Q
Why do CO2 levels vary throughout the day
A
Photosynthesis can only happen during the day as light is needed
Respiration is carried out all the time by living organisms
4
Q
What does carbon in decaying waste matter become
A
Over millions of years plants and animals become fossil fuels
