Question

Test yourself
2 What does combustion mean?
4 What does non-renewable mean?
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rivers
move
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b) Name one other greenhouse gas.
8 a) What is global warming?
out running out
1 Where does most of the world's energy come from?
3 List five common fuels that could be used in the home.
5 We are running out of fossil fuels. Suggest three ways we can deal with this problem
6 What happens to the heat energy that reaches Earth from the Sun?
7 a) Explain why carbon dioxide is called a greenhouse gas.
enewable energy resources
Cause fossil fuels will eventually run out, scientists are developing other ways olgen
rgy. Energy sources that do not use fuels taken from the Earth are called all
gy sources. They use natural sources such as the Sun, tides, and wind. These
b) Explain how global warming can lead to the flooding of low-lying areas.
wable energy sources because they will be able to supply energy for million​

Answer 1

Answer:

1. Combustion, a chemical reaction between substances, usually including oxygen and usually accompanied by the generation of heat and light in the form of flame.
2. A nonrenewable resource is a natural substance that is not replenished with the speed at which it is consumed. It is a finite resource. Fossil fuels such as oil, natural gas, and coal are examples of nonrenewable resources. ... Renewable resources are the opposite: Their supply replenishes naturally or can be sustained.
3. The main greenhouse gases are: Water vapor. Carbon dioxide. Methane.
4. Of late, global emission of methane has been rising, and scientists have not figured out all the reasons. ... Many scientists fear that rising temperatures can cause methane to escape from sources where it is buried at the moment, causing runaway global warming.
5. Currently, 84% of the world's energy comes from fossil fuel sources. Coal is one of the main sources of fossil fuel energy. Roughly 146 quadrillion BTUs of coal were consumed worldwide in 2012. That means about 30% of the world's energy comes from coal.
6. Natural Gas-Heating and cooking, Coal- Electric power, Alcohol-Gasonline Helper, Uranium-Carbon FreePower, water
7. Alternative, renewable energy sources, such as wind and solar power, eliminate the pollution that accompanies fossil fuel energy. Alternative energy also reduces the reliance on limited fossil fuels. Consider installing solar panels in your home to reduce the amount of fossil fuel needed to power your home.