KS2 SATs KS2 Science 4

Question 1

What is the difference between a habitat and an ecosystem?

Accepted Answer

A habitat is where an organism lives; an ecosystem includes all organisms and their environment

Answer

A habitat is the specific environment where a particular organism lives (e.g., a pond). An ecosystem includes all the living organisms in an area AND their physical environment and interactions.

Question 2

What force opposes the motion of an object moving through air?

Accepted Answer

Air resistance

Answer

Air resistance (also called drag) is the force that opposes the movement of an object through the air. It acts in the opposite direction to motion. Streamlined shapes reduce air resistance.

Question 3

What is the function of chlorophyll in plants?

Accepted Answer

To trap light energy for photosynthesis

Answer

Chlorophyll is the green pigment found in chloroplasts in plant cells. Its function is to absorb light energy (mainly red and blue wavelengths) from the Sun to power photosynthesis.

Question 4

Which of the following is an example of a reversible change?

Accepted Answer

Melting ice

Answer

Melting ice is reversible because liquid water can be refrozen back into ice. Burning, cooking, and rusting are irreversible changes — you cannot return the substance to its original form.

Question 5

What is the geocentric model of the solar system?

Accepted Answer

The Earth is at the centre

Answer

The geocentric model (proposed by ancient astronomers including Ptolemy) placed Earth at the centre of the universe, with the Sun and planets orbiting it. This was replaced by the heliocentric model.

KS2 SATs Practice Test

KS2 SATs Practice Test

KS2 SATs KS2 Science 4