Natural Resources Grade 9

________________________________ materials or substances occurring in nature which can be exploited for economic gain.

• NATURAL

• MAN MADE

• HUMAN MADE

• RESOURCES

Which one of the following are not natural resources

• WATER

• AIR

• SOIL

• PLASTIC

_________________ cells and_________________ cells need oxygen to break down glucose molecules and get energy for their activities.

• Eukaryotic and prokaryotic

• carbon dioxide and oxygen

• meristematic cells and parenchyma cells

• OZONE

BIOTIC means

• Living things

• non-living

______________ is an important resource that decides the diversity of life in an area

• Soil

• WATER

• SUN

• AIR

formula of OZONE

• O3

• O2

• O

• CO2

_________________prevents those harmful radiations from reaching the surface of the Earth where they may damage many forms of life.

• OZONE

• CO

• OXYGEN

• BIOCHEMICALS

The outermost layer of our Earth is called the

• CRUST

• CORE

• INNER CORE

• OUTER CORE

carbon dioxide constitutes up to ________________ of the atmosphere on Venus and Mars.