YEAR 7 SCIENCE HOMEWORK – 3
 COMPREHENSION: Read and answer the questions below.
Read the passage and answer the questions below.
Solids, liquids and gases are all around us. Steel, concrete, wood and plastic are all
solids. Some liquids are water, oil and petrol. One gas is carbon dioxide. This gas
makes the fizz in soft drinks. Air is a mixture of gases. The smell of perfume or food
being cooked is due to gases which move through the air.
We usually find solids, liquids and gases mixed together. Air contains dissolved
gases. The sand grains on the beach have water and air bubbles between them.
Lemonade contains bubbles of gas in a liquid. If you place ice in the lemonade, all
three states of matter are in the same container.
Solid, liquid and gas are called the states of matter. All substances exist in one of
these three states. All substances can change their state.
1.
2.
3.
4.
Which gas is usually used in fizzy drinks?
What is air made up of?
Write three examples of solids and liquids at home?
What are the three states of matter?
QUIZ
Write True or False
1.
2.
3.
4.
There are 3 states of matter.
Air is not a mixture of gases.
Concrete is an example of solid.
Carbon di oxide is an example of a liquid.
Paste this homework sheet in your science book.