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may science alexis
science ch.9 lesson 1,2,
Question | Answer |
---|---|
what is a fossil fuel? | a energy source formed from the decayed remains of ancient plants and other organisms. |
what are some examples of fossil fuels? | coal, oil and natural gas |
where did coal come from? | millions of years ago in swampy regions where fern like plants grew |
how did coal form? | the remains of ancient swamp vegitation over time. |
where does oil & natural gas come from? | it is formed from algae and other organisms that have died - over millions of years ago. |
the decayed material eventually forms ___ and ___. | liquid and gas |
why does oil and natural gas move up wards after they formed? | oil and natural gas once formed move upward because they are less dence then the rock surronding them. they became trapped by rock that is too thick to pass through. |
where is fossil fuels burned? | in cars, power plants, homes, and factories |
what is pollution? | harmful waste products, chemicals, and substances found in the enviroment. |
how many people died because of air pollution? | 60,000 |
what is acid rain? | a product when gases released by burning oil and coal mix with water in the air to form acidic rain or snow. |
what is a nonrenewable source? | resources that cannot be replaced by natural processes in less then 100 years. |
are fossil fuels nonrenewable? | yes, that means humans can run out of these important resources of energy someday. |
what is a renewable resource? | energy that can be recycled or replaced. |
what uses energy from the sun? | solar energy |
what changes light into electicity? | solar cells |
one hour of energy reaches earth can last for how long? | one year |
what uses windmills? | wind energy |
what is a wind farm? | many windmills in one area |
what is hydroelectric power? | using moving water |
what are two sources of moving water? | natural waterfalls and concrete dams |
what are some disadvantages of hydroelectric power? | it increases eroison downstream, wildlife habitats disturbed, and some places not near flowing water |
what is geothermal energy? | it is when you use the magma and hot rock beneath Earth's surface. |
when magma close to Earth's surface what happens? | geysers erupt |
what is nuclear energy? | produced by splitting nuclei of certain elements |
what is another name for the splitting procces? | fission |
how long can coal last? | 200-300 years |
how many years does oil last? | 30-40 years |
what are the 4 renewable resources? | sun, wind, water, and geohtermal energy |
does energy from the sun cause pollution? | NO |
are many alternative sources of energy renewable or nonrenewable? | renewable |
how do we use wind? | by sailing, flying kites, and when we use windmills. |
who uses niagra falls fro hydrolelecrtic power? | Canada and eastern North America |
what are some disadvantages of dams? | it starts sediment, erosion, land is flooded, and habitats disturbed |
what are some disadvantages of geothermal energy? | it releases salty water at earth's surface which causes plants and animals to get hurt, only a few places have magma, it is hard and expensive to drill for magma. |
what is the most recent found fuel in nuclear power plants? | uranium |
what can nuclear energy cause? | cancer, or have other harmfull effects on living things |
how many years will the nuclear waste remain radioactive? | for more than 10,000 |
worldwide how many countries use nuclear energy to generate electricity? | 30 years |
what percent of the world's energy is supplied by fossil fuels? | 90 percent |
what percent of Earth is covered by water? | 70 percent |
all living things need what kind of water to survive? | clean water |
what two things help shape Earth's surface? | erosion and deposition |
what continually moves water? | the water cycle |
how much of Earth's water is salt water? | 97 percent |
what is groundwater? | water that soaks into the ground and collects in small spaces inbetween bits of soil and rock |
in the U.S. how much groundwater provides us public water supply? | 40 percent |
where does surface water come from? | fishing, swimming, cooking, and bathing |
what is water pollution? | harmful debris, chemicals, or biological materials added to water |
what is a point source pollution? | some pollution comes from a single, identifiable source |
what is a nonpoitn source of pollution? | a source of pollution that can't be traced back to an exect location |
is land a renewable resource? | YES |
before building, what do the people have to look for? | indangered plants or animals, the soil is right, and if it will effect the water |
what affect do trees have on us? | they make oxygen and carbonyhrates |
what can carbon dioxide? | global worming |
what is global worming? | a rise in tempurture around the world |
what is conservation? | the careful use of resources with the goal of resucing damage to the enviroment |
is a tree a nonrenewable resource or a renewable resource? | renewable resource |
why are forests a nonrenewable resource? | they are a complex ecosystem that supports countries living things |
what is another source that is obtained by land? | minerals |
hwta is an ore? | a mineral resource that can be mined at a profit |
This is vital to earth | Water |
The earth is cover by what amount of water | 70% |
What percentage of the earth is land | 30% |
What are the two major sources of water used for the public water supply? | Ground water and water found on the earth's surface |
How many laws are there to reduce water pollution? | 2 |
What are the two laws that help reduce water pollution? | Safe Drinking Water Act and The Clean Water Act |
What does the Safe Drinking Water Act do? | ensures safe drinking water |
What does the Clean Water Act do? | gives states money to build water treatment plants |
Is land a renewable resource? | YES |
The amount of land is ____________? | limited |
What are things that people must do use the land wisely? | (1) preserve natural habitats and reduce soil erosion. |
what are the three uses of land? | Land, forests, minerals |
What a re some things people must do when they use land? | Preserve natural habitat and reduce soil |
What is an important product from the forest? | wood |
What is it called when there is a careful use of resource to reduce environmental damage? | conservation |
What is it called when you limit the number of trees in one area are cut down and replaced? | Select cutting |
What is it called when all the trees in one area are cut down and replaced? | clear cutting |
This is a renewable resource that can be replenished by planting a tree? | Tree |
This is a renewable resource of a complex ecosystem? | Forest |
These are land resources found in rocks? | minerals |
This is a mineral at a profit? | ore |
Where is ore founded? | under the earth surface |
What is an example of a metal? | Iron |
What is iron? | a type of metal |
What is the process used to reach ore? | Mining |
What does mining do? | It moves large qualities of soil and rock |
What negative effects does mining have? | It affects the enviroment |