 A.
water
 B. wind
 C. heat
 D. coal
 A.
oil
 B. petroleum gasoline
 C. natural gas
 D. water
 A.
Renewable energy is better for the
environment.
 B. Renewable energy is not going to run out
anytime soon.
 C. Renewable energy is easier to use.
 D. both A and B
 A.
running
 B. jumping
 C. eating
 D. throwing a ball
 A.
light energy
 B. solar energy
 C. chemical energy
 D. geothermal energy
 A.
windmill energy
 B. biomass energy
 C. conduction
 D. solar energy
 A.
convection
 B. conduction
 C. radiation
 D. hydroelectric
 A.
heat
 B. work
 C. force
 D. eat
 A.
solar energy
 B. potential energy
 C. geothermal energy
 D. biomass energy
 A.
fire
 B. water
 C. wind
 D. chemicals
 A.
kinetic energy
 B. conduction
 C. potential energy
 D. chemical energy
 A.
radiation
 B. conduction
 C. convection
 D. fossil fuels
 A.
light energy
 B. heat energy
 C. geothermal energy
 D. solar energy
 A.
wind; airplane
 B. sun; solar
 C. water; hydroelectric
 D. wind; windmill
 A.
solar
 B. light
 C. heat
 D. chemical
 A.
energy
 B. work
 C. power
 D. radiation
 A.
potential energy
 B. chemical energy
 C. biomass energy
 D. kinetic energy
 A.
hydroelectric energy
 B. mechanical energy
 C. light energy
 D. heat energy
 A.
convection
 B. conduction
 C. radiation
 D. kinetic
 A.
wood
 B. coal
 C. oil
 D. natural gas