PSLE Science Chemistry Topics 3

Question 1

Which property of a material describes how well it transfers heat?

Accepted Answer

Thermal conductivity

Answer

Hardness

Answer

Flexibility

Answer

Transparency

Question 2

Which of the following materials is the best conductor of electricity?

Accepted Answer

Copper

Answer

Rubber

Answer

Wood

Answer

Plastic

Question 3

What does it mean when a material is described as 'magnetic'?

Accepted Answer

It is attracted to a magnet

Answer

It allows light to pass through it

Answer

It dissolves easily in water

Answer

It is a good conductor of electricity

Question 4

Which material is most suitable for making a waterproof raincoat?

Accepted Answer

Rubber

Answer

Cotton

Answer

Wool

Answer

Paper

Question 5

A material that allows light to pass through it so that objects behind it can be seen clearly is called:

Accepted Answer

Transparent

Answer

Opaque

Answer

Translucent

Answer

Reflective

Question 6

Why is rubber used as the coating on electrical wires?

Accepted Answer

Rubber is an insulator that prevents electric shocks

Answer

Rubber is a good conductor that helps electricity flow faster

Answer

Rubber is transparent so you can see the wire inside

Answer

Rubber is magnetic so it holds the wire in place

Question 7

A material that does NOT allow any light to pass through it is described as:

Accepted Answer

Opaque

Answer

Transparent

Answer

Translucent

Answer

Luminous