lesson 11- energy applications

Question 1

wind energy

Answer 1

-uneven heating of the earth’s surface by sun causes convection currents of air

Question 2

what are some solar energy sources?

Answer 2

wind energy, water energy, biomass, fossil fuels

Question 3

water energy

Answer 3

-energy from evaporated water, driving the hydrologic cycle

Question 4

biomass

Answer 4

all living organisms obtain energy originated from the sun

Question 5

fossil fuels

Answer 5

• formed from ancient plants and animals
• non- renewable source of energy

Question 6

non solar energy sources

Answer 6

• nuclear energy
• geothermal energy
• tidal energy

Question 7

nuclear energy

Answer 7

-energy contained in the nucleus of atoms

Question 8

geothermal energy

Answer 8

-thermal energy from the earth’s interior (radioactive decay)

Question 9

tidal energy

Answer 9

caused by gravitational pull of the moon

Question 10

how much energy have humans consumed per day in regard to our ancestors

Answer 10

ancestors- 10 mega joules
today- 180 and 1000 mega joules

Question 11

why are fossil fuels used so much?

Answer 11

they are cheaper and convenient, except it is horrible for the environment

Question 12

cogeneration

Answer 12

waste energy from one process used to power a second process

Question 13

an example of cogeneration

Answer 13

in thermal power stations, steam used to turn turbines could be also used to heat up buildings