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Rocks contain metals such as gold and silver. Clay is a soft rock that is used for

making bricks and pottery. Glass is also made from rocks.

Gold Silver Clay

Glass

Fossil Fuels

Plants and animals that died millions of years ago were buried deep under

the soil. The hardened remains of these plants and animals are called fossils.

Fossils of plants and animals both on land and in water have been found. The

dead remains of plants and animals lying on the ground were covered with

sand, mud and water to form a hard substance. After a long time, minerals

from the earth’s surface seeped into these hard substances and slowly turned
them into rocks.

Coal, petroleum, and natural gas are called fossil fuels as they form from the

buried remains of dead plants and animals.

Did You Petroleum is also known as crude oil. Crude oil is taken out of the ground and sent to
Know? a refinery, where various components are processed to create petroleum products that
can be used. These petroleum products include fuel (gasoline), lubricating oils, waxes,
jet fuel, synthetic rubber, plastics, heating oil and diesel.

Conservation of Natural Resources

Natural resources should be used very carefully as we

cannot replace them. Preserving and taking care of

natural resources for the benefit of all living things is

called conservation of natural resources.

Natural resources provide all of the needs we need to

survive, including food, water, air, and shelter.

Some resources, like small plants, can be regenerated

quickly after being used.

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