chapter 18

Question 1

two strategies to decrease resiliance on fossil fuels

Answer 1

developing alternative energy sources

reducing energy use

Question 2

where does 8 percent of energy consumed in the U>S goes towards ?

Answer 2

heating water

Question 3

what are passive solar heating used for?

Answer 3

distributes collected heat

design heats buildings in the summer and cools it in the winter

Question 4

hydropower

a) definition
b) what drives the hydrologic cycle
c) what does the dam do?

Answer 4

a) form of renewable energy that relies on flowing or falling water to generate electricity
b) sun
c) holds back energy and can be converted into electricity

Question 5

hydropower generates about ___% of the world’s electricity

How about in the U.S alone?

Answer 5

a) 19%

b) 7%

Question 6

what are some problems with wind turbines?

Answer 6

It can cause bird kills

aesthetic issues

Question 7

problems with with hydropower: damns change the natural flow of rivers
a) how?
whats natural disasters may occur?

Answer 7

a) the water floods large lands and destroys plant and animal habitats
b) earthquakes

Question 8

active solar heating

Answer 8

1. We solar panels ->sunlight enters the solar panels +warms liquid flowing through pipes to exchange heat ->each solar panel is a box w/ black metal base and glass covering–>4 in heat exchange, fluid heats the water– then moves into hot water storage tank –> 5 back up heater runs on electricity on natural gas and keeps water hot