Q: Fact: biofuel releases carbon dioxide into the atmosphere
Question: As Ethanol burns it expels what into the ozone

A: CO2

Q: Fact: a doorbell converts electrical energy into sound
Question: The doorbell was pushed, but sound failed to emit. What might cause this?

A: Batteries dead

Q: Fact: recyclable means a material can be recycled
Question: Which can go in the recycled bin

A: Sprite container

Q: Fact: Matter in the gas phase has variable volume
Question: Matter in the gas phase has

A:
fluctuating volume