PSLE Science Physics Topics 1

Question 1

What form of energy does a moving car have?

Accepted Answer

Kinetic energy

Answer

A moving car has kinetic energy — the energy of motion. The faster it moves, the more kinetic energy it has.

Question 2

Which material is a good conductor of electricity?

Accepted Answer

Copper

Answer

Copper is an excellent conductor of electricity because it allows electric charges to flow through it easily. That is why wires are often made of copper.

Question 3

What is the SI unit of force?

Accepted Answer

Newton

Answer

The Newton (N) is the SI unit of force, named after Sir Isaac Newton. 1 N is the force needed to accelerate 1 kg by 1 m/s².

Question 4

Which of the following is a source of light?

Accepted Answer

Sun

Answer

The Sun produces its own light through nuclear fusion. The Moon and mirrors only reflect light from other sources.

Question 5

What happens to the shadow of an object when the light source moves closer to it?

Accepted Answer

The shadow gets larger

Answer

When the light source moves closer to an object, the shadow becomes larger because the object blocks a greater proportion of the light.

PSLE Practice Test

PSLE Practice Test

PSLE Science Physics Topics 1