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Human Uses of Energy

Across
The generation of electrical energy by use of flowing rivers
Made from a limited amount of mined rock known as uranium
Cannot be replaced
Heat energy obtained from beneath the Earth's surface
Down
Is created as the sun heats the atmosphere and causes the air to move around
Can be replaced
Resources that were formed as ancient plants and animals decayed underground
Energy from the sun that is converted into thermal energy or electrical energy
A harmful substance released into the environment
Chemical energy from the sun that is stored in the cells of plants