Energy Crossword

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ACROSS
3   Power from water.
6   Heat inside the earth.
9   Power from the Sun.
10   Where solar heat is produced.
11   A living, renewable energy source.
12   Used for nuclear fuels.
15   Used for hydropower, drinking & irrogation.
 
DOWN
1   Moving air used to create energy.
2   Plant materials and animal waste used as fuel.
4   Colorless gas found in natural gas and petroleum; used as a fuel.
5   Energy made available by the flow of a charge through a conductor.
7   Fossil fuel consisting of carbonized vegetable matter burned to generate energy.
8   The planet we all share.
13   You breathe this every day.
14   It's not a solid, not a liquid so it must be a...