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Earth Sciences 20 Online
OpenStudy (swagster23780):

Which fuel is used for nuclear power? A. coal B. oil C. natural gas D. uranium

OpenStudy (anonymous):

what do you think?

OpenStudy (swagster23780):

D

OpenStudy (anonymous):

i agree, since uranium is how we generate nuclear power

OpenStudy (swagster23780):

got few more can you help me

OpenStudy (anonymous):

sure

OpenStudy (swagster23780):

Which is related to air pollution in Mexico City? A. using biofuels B. using hydropower C. burning fossil fuels D. collecting natural gas

OpenStudy (anonymous):

what do you think

OpenStudy (swagster23780):

C

OpenStudy (anonymous):

i agree, since Mexico uses alot of fossil fuel because it is cheap and easy to produce, and it contributes to pollution

OpenStudy (swagster23780):

C

OpenStudy (swagster23780):

Which is a cost that comes with using coal as an energy source? A. Coal produces less energy than most other energy resources. B. When burned, coal produces pollutants that are released into the air. C. Mining coal improves the environment. D. Coal will stay plentiful in the United States.

OpenStudy (barreraa):

i believe @ the correct answer is B @SWAGSTER23780

OpenStudy (swagster23780):

im here

OpenStudy (swagster23780):

Which alternative energy source is used in Iceland? A. coal B. nuclear power C. geothermal energy D. wind power

OpenStudy (barreraa):

geothermal energy

OpenStudy (swagster23780):

In which tool is mechanical energy converted to electrical energy? A. turbine B. generator C. reactor D. condenser

OpenStudy (barreraa):

A. A generator is a good choice, but it uses chemical energy (gas powered).

OpenStudy (barreraa):

so it would be a turbine

OpenStudy (swagster23780):

Which best describes how solar power is used for heating? A. Special cells store energy from the sun for later use. B. The sun warms the ground from which heat flows into a home. C. The sun heats water stored within panels containing copper tubes, and then the water flows into a home. D. Heat from the sun causes a turbine to spin.

OpenStudy (barreraa):

C. The sun heats water stored within panels containing copper tubes, and then the water flows into a home.

OpenStudy (swagster23780):

Which practice fits the definition of conservation? A. throwing away a paper towel after cleaning a countertop B. cleaning a countertop with a sponge and rinsing it out C. throwing away an aluminum can after drinking the beverage inside D. using a disposable plastic bag to carry groceries

OpenStudy (barreraa):

It is "B. Cleaning a countertop with a sponge and rinsing it out to reuse" that represents and example of conservation. Re-using items is better than throwing them away if possible.

OpenStudy (swagster23780):

Which statement comparing examples of renewable and nonrenewable resources is true? A. Wind is a renewable resource because it can't be used up, but coal is a nonrenewable resource because it will eventually run out. B. Wind is a nonrenewable resource because it can't be used up, but coal is a renewable resource because it will eventually run out. C. Both wind and coal are renewable resources because they will never run out. D. Both wind and coal are nonrenewable resources because they will eventually run out.

OpenStudy (barreraa):

Both geothermal energy and natural gas are renewable resources because they will never run out.

OpenStudy (swagster23780):

which one

OpenStudy (barreraa):

B

OpenStudy (swagster23780):

almost done and thank you for helping

OpenStudy (swagster23780):

Why is natural gas referred to as a fossil fuel? A. Natural gas formed from dead marine organisms that fell to the ocean floor, were covered by ocean sediments, and broken down by bacteria into natural gas over millions of years. B. Natural gas was formed from the breakdown of igneous rocks over millions of years. C. Natural gas was formed from decaying layers of plants in swamps millions of years ago. They fossilized into natural gas. D. Natural gas was formed from black shales that were heated underneath by magma, thereby causing the release of natural gas.

OpenStudy (swagster23780):

Which correctly compares how coal and natural gas are formed? A. Coal results from the compressed remains of plant matter, while natural gas is the compressed remains of marine organisms. Coal was made due to pressure and heat under buried layers of rock over millions of years, while natural gas was made by heating the compressed remains from magma underneath. B. Coal results from the compressed remains of marine organisms, while natural gas is the compressed remains of plants. Both are made due to pressure and heat under buried layers of rock over millions of years. C. Coal results from the compressed remains of plant matter, while natural gas is the compressed remains of marine organisms. Natural gas was made due to pressure and heat under buried layers of rock over millions of years, while coal was made by heating the compressed remains from magma underneath. D. Coal results from the compressed remains of plant matter, while natural gas is the compressed remains of marine organisms. Both are made due to pressure and heat under buried layers of rock over millions of years.

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