Save Status:
or to save your progress. The page will not refresh.
Controls:
SPACEBAR SWITCHES TYPING DIRECTION
Answer Key:
Edit a Copy:
Make Your Own:
Crossword Word Search Worksheet
Rate This Puzzle:
Log in or sign up to rate this puzzle.

Powering the Planet Unit 9

Across
A fuel that comes from living matter
A different form
Energy produced by the force of water
A machine that produces electrical energy
Down
Fuels consisting of decayed plants and animals
To use up
Energy formed from heat within the earth
Molten rock material under the earth's crust
Plant materials and animal waste used as a fuel source
When something can be replenished naturally over time such as wind
A engine that works by water, steam, or air