Natural Resources

123456789
Across
  1. 2. energy from moving water
  2. 3. gas, formed deep beneath the Earth's surface
  3. 6. fuels, cheapest source of energy
  4. 8. most essential resource on Earth
  5. 9. a non renewable resource
Down
  1. 1. resource, substance found naturally on Earth
  2. 3. renewable, used up more quickly than replaced
  3. 4. does not run out
  4. 5. energy from the sun
  5. 7. thermal, energy produced from heat within the Earth