Short Question

Matter and its characteristics : Short Question

1 What is matter?

Everything in the world that has some mass and occupies space is called matter.

2 What is difference between a solid and a liquid?

1. Solid: Solids have definite shape, mass and volume. For example, a brick , iron rod etc. 2. Liquid: Liquids have definite mass and volume but they do not have a fixed shape. For example, water, milk oil etc.

3 Why it is not very good idea to use aerosol sprays?

These contain chemicals that could harm the environment when released into the atmosphere.

4 What are some of the properties of aluminium?

Aluminium is a silvery-white, soft, non-magnetic and easily shaped metal.

5 Do liquids have a fixed shape? Explain your answer.

Liquids have a definite mass and a definite volume but they do not have a fixed shape. They take the shape of container in which they are present.

6 Do the particles in a liquid stay in one place?

No, the particles in a liquid are not packed together so closely. The force of attraction between the particles is not so strong. The particles move about more freely.

7 Why is it not very good idea to dispose of oil down drains or into lakes and rivers?

Oils do not dissolve in water. They can block drains. They form a film on water and can harm wildlife and plants. Never pour oil down a drain.

8 Differentiate between conductors and insulators?

1. Conductors: The materials through which electricity and heat can flow are called conductors. Examples: Silver, copper, aluminium, mercury, steel, iron etc. 2. Insulators: The materials through which electricity and heat cannot flow are called insulators. Examples: Plastic, rubber, wood, air, glass, paper, fabric etc.

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