Part 3

Question 1

Wood, plant materials, or animals feces that are burned directly

Answer 1

solid biomass

Question 2

A place within the earth’s crust that has concentrated areas of heat

Answer 2

hydrothermal reservoir

Question 3

A system that uses temperature differences between the ground and the air to heat or cool houses

Answer 3

geothermal heat pump

Question 4

heat stored in soil, underground rocks, and the fluid in the earth’s mantle

Answer 4

geothermal energy

Question 5

plant materials or animal wastes that can be burned for energy

Answer 5

biomass energy

Question 6

plant materials or solid wastes that have been converted to a gaseous or liquid form

Answer 6

biofuel

Question 7

A very clean fuel that could replace gasoline but at present has a negative net energy

Answer 7

hydrogen

Question 8

Still in the experimental stage

Answer 8

ocean thermal energy

Question 9

Renewable, inexpensive, reliable source of electricity that has little to no carbon dioxide emissions, but may cause geological damage, methane emissions, and habitat loss

Answer 9

hydroelectricity

Question 10

Reliable, but not many places in the world suitable for generating this type of power

Answer 10

tidal

Question 11

The radioactive material that is left over from the process of generating electricity

Answer 11

nuclear waste

Question 12

A structure where electricity is made through controlled nuclear fission chain reactions

Answer 12

nuclear reactor

Question 13

A reaction where an atoms nucleus is split apart to form smaller nuclei

Answer 13

nuclear fission

Question 14

A reaction where two atoms join together to make a new atom

Answer 14

nuclear fusion