More cards in this set

Why are pyramids of biomass difficult to construct?

What is some energy used for as it flows along a food chain?

What other ways is the energy transferred?

Why isn't the material lost at each stage wasted?

How would you calculate energy efficiency?

Why does carbon have to be recycled?

How is carbon dioxide removed from the air by plants?

How else is carbon dioxide released into the air?

What absorbs carbon dioxide from the air?

How can the carbon in limestone be returned into the air?