Across
- 4. Organic matter produced by plants that can be burned in either solid or gaseous form to produce energy
- 6. a condition in which they do not get enough protein and other key nutrients
- 10. Chemical element or inorganic compound that exists as a solid with a regularly repeating internal structure
- 11. Measure of how much useful work can be extracted from each unit of energy used
- 13. when the land above an aquifer subsides, or sinks
- 14. Heat stored in soil, underground rocks, and fluids in the Earth’s mantle. It is used to heat and cool buildings and water and to produce electricity.
Down
- 1. a collection of canals, dams, and pumps used to transfer fresh water to farms and heavily populated cities
- 2. Earth’s outermost and thinnest layer of solid materials
- 3. lack of access to nutritious food
- 4. Fuel, such as ethyl alcohol or biodiesel, made from biomass
- 5. forms of government support intended to help businesses, like farms, survive
- 7. a layer of permeable rock below ground where ground water is stored
- 8. the process of eroding topsoil due to human activities, drought, and climate change
- 9. Water used water from showers, sinks, dishwaters, and clothes washers
- 12. Amount of high-quality energy available from a given quantity of an energy resource minus the high-quality energy needed to make the energy available.