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Vocab. activity #2

Across
A method for changing plant and animal material into high quality fuel
Something that allows an object to stay afloat in water or another fluid
Fuel from organic matter
Something that you can not renew that's a resource
The transfer of heat by circulation
A substance that takes part in and undergoes change during a reaction
A resource you can reuse
A substance produced during a natural process
Down
When something rubs against something it is called
The heat required to raise the unit mass of a substance by unit interval
A current that results from convection
What happens in chemistry
A gas made up of carbon and hydrogen
The process by which sound waves travel through a medium
The compactness of a substance
A manufactured fuel that can be mixed with gasoline to run cars
The use of force to move an object through distance