Unit 3.2 7-2 science

__________ is a type of black, crumbly rock. But unlike most rocks, coal is made of material from prehistoric plants that has been compressed and chemically altered over a long period of time.

• Coal

• copper

When the coal-forming plants were alive, they carried out the process of photosynthesis, just like plants do today. They captured radiant energy from the sun and used it to convert carbon dioxide and water into sugars, which they stored for use when needed. When these plants died, their remains sank, accumulated in the basins, and were gradually converted to a substance called _______

• peat

• moss

______is a brown material that is made of partially decomposed plants. Over time, the peat became covered with sediments that were carried into the basins from the nearby mountains.

• coal

• Peat

___________are raw materials like forests or fresh water. They are necessary for our survival or make our lives better, that are obtained from the earth

• Non-renewable resources

• Natural resources

• coal

• Coal, which forms over millions of years, is a source of energy. Once it is used, it cannot be made again. Energy from the Sun is never used up. This is an example of?

• renewable resource.

• non-renewable resource.

_____Fossil fuels such as natural gas, crude oil, and coal are formed over a span of millions of years. There is a limited supply of these resources and people are using them faster than they can be replaced.

• nonrenewable resource

• renewable resource

________coal, oil and gas are examples of?

These are resources of unlimited supply

• nonrenewable

• renewable

.Different types of mineral resources formed under different geological condition is defined as?

• uneven distribution

• equal distribution

• Past geologic  processes like plate tectonics determine where many of the natural resources are found today _____________________________________________

• (such as minerals as well as water in the ground, soil, oil, natural gas and coal deposits)

• (such as minerals as well as peat in the ground, soil, oil, natural gas and coal deposits)

_______is a liquid fossil fuel, formed from decomposed organic matter over millions of years.

• oil

• gas