the upper layer of earth in which plants grow, a black or dark brown material typically consisting of a mixture of organic remains, clay, and rock particles.
What is soil
100
heat energy from inside earth
What is geothermal energy?
100
making new products by reusing materials that would soon be thrown away
What is recycling
200
chemical to light and heat
What is the conversion for a battery
200
harmful addition to the environment
What is pollution?
200
a mixture of gasses formed from marine organisms
What is natural gas
200
a source of energy in a nuclear power plant
What is nuclear fuel
200
collecting energy that is produced by falling or running water and changing it into electricity
What is hydroelectric power
300
electrical to mechanical
What is the energy conversion for an electric fan?
300
a hard black substance formed from plants that lived about 300 million years ago
What is coal?
300
a material made artificially
What is synthetic
300
coal,oil,natural gas
What are some types of energy
400
sunlight to electricity
What is the energy conversion for a solar cell?
400
a thick, black liquid that forms from decaying plants and animals
What is oil?
400
a thick black liquid that forms from decaying plants and animals
What is oil?
400
light, heat, electricity we use comes from a(n) ________
What is energy source
400
the amount of usable energy compared with the total amount of energy used to produce the usable energy
What is efficiency
500
chemical to heat to mechanical
What is the energy conversion for a steam engine?
500
the joining of two nuclei to make a nucleus with a larger mass
What is fusion?
500
a hard black substance formed from plants that lived about 300 million years ago.
What is coal?
500
any form of energy radiated by the sun
What is solar energy
500
any material taken from earth that takes a long time to replace or cannot be replaced