Florida Science Grade 8

Chapter 20: Resources

Resources

1
What is the process where large quantities of soil and rock are moved to get to a material called?
A)clearing
B)panning
C)erosion
D)mining
2
What element is used a solar cell?
A)silicon
B)carbon
C)calcium
D)iron
3
A __________ is an area where a large number of windmills are placed to generate electricity.
A)wind tunnel
B)windmill city
C)hilltop
D)wind farm
4
Fossil fuels cannot be replaced by natural processes in less than 100 years. They are classified as __________.
A)renewable
B)expensive
C)nonrenewable
D)precious
5
How long can some radioactive waste remain active?
A)10,000 years
B)10 years
C)1 year
D)100 years
6
How much of Earth's water supply is freshwater?
A)5 percent
B)10 percent
C)3 percent
D)97 percent
7
Water pollution that cannot be traced to an exact location is called a __________.
A)wetland
B)runoff
C)nonpoint source
D)spill
8
Why do oil and natural gas move upward toward the surface of Earth?
A)They are less dense than the surrounding rock and pore water contained within small spaces in the rock.
B)Oil and natural gas do not move toward the surface.
C)Oil and natural gas are more dense than the surrounding rock and therefore rise to the surface.
D)Geothermal activity forces oil and natural gas toward the surface.
9
What is the main source of energy for homes and factories in the United States?
A)solar collectors
B)peat
C)wood
D)electrical power plants
10
What is one drawback of using solar cells to make electric?
A)They are expensive.
B)They are hard to use.
C)They cause pollution.
D)They are not reliable.
11
Water that soaks into the ground and collects in small spaces between bits of soil and rock is called __________.
A)surface water
B)groundwater
C)freshwater
D)drinking water
12
__________ uses water to produce electricity.
A)Hydrothermal power
B)Wind power
C)Hydroelectric power
D)Solar power
13
Sun, wind, and water are all examples of __________ because they can be replaced by natural processes in less than 100 years.
A)alternative energy resources
B)clean energy sources
C)renewable resources
D)inexpensive resources
14
Today's cars have __________ that reduce the amount of pollutants released in car exhaust.
A)filters
B)catalytic converters
C)exhaust converters
D)mufflers
15
What forms fossil fuels?
A)the decayed remains of ancient plants and other organisms
B)the compression of ash from a volcanic eruption
C)a chemical reaction between water and the soil
D)acid rain
16
Solar energy is obtain from __________.
A)rivers
B)wind
C)the Sun
D)stars
17
How many years of oil reserves do scientists estimate are left?
A)100
B)60
C)200 to 300
D)between 30 and 40
18
Harmful waste produce by burning fossil fuels is called __________.
A)radioactive waste
B)pollution
C)mud
D)smudge
19
Before vegetation is converted to coal, a dark, organic material called __________ is formed.
A)peat
B)anthracite
C)oil
D)lignite
20
Which of the following is a form of conservation?
A)Using only fossil fuels to produce electricity
B)Clear-cutting a forest without replanting new trees
C)Letting the water run the entire time you are brushing your teeth
D)Select-cutting certain trees in a forest