Stage 6 Science - Checkpoint Revision - October 2025

Oliver eats food containing bacteria.

This gives him food poisoning and makes him feel ill.

(a) Which statements describe ways to stop Oliver getting food poisoning again?

• Always drink water with food

• wash hands before eating food

• eat food that is not cooked

• spray insect repellent on food

• use clean knives

What does Oliver have in his stomach that kills bacteria?

• stomach acid
• digestive enzymes
• probiotics
• bile salts

Bacteria cause disease.

Write down two other types of living things that cause disease.

• Protozoa, algae
• Worms, insects
• Viruses, fungi
• Molds, prions

Blessy measures 60 cm³

of water. Name the equipment Blessy uses to accurately measure 60cm³

of water.

• Beaker
• Pipette
• Measuring cup
• Graduated cylinder

Blessy pours the water into a beaker. She heats the water in the beaker.

Look at the diagram Blessy uses to heat the water.

Write down one safety risk for this experiment.

• Burns or scalds from hot water or equipment.
• Exposure to cold air while heating.
• Inhalation of steam from the heated water.
• Spills from the beaker causing wet surfaces.

Complete the sentence using one word from the list.

particle / product / property / reaction

The temperature at which water changes state is a

of water.

• particle

• product

• property

• reaction

Aiko makes an electrical circuit.

Select the correct statement that describes this circuit.

• a parallel circuit with lamp 1 and lamp 2 of the same brightness

• a parallel circuit with lamp 1 brighter than lamp 2

• a series circuit with lamp 1 and lamp 2 of the same brightness

• a series circuit with lamp 1 brighter than lamp 2

Look at the symbol for a different component.

Describe what happens when this component is added to a complete electrical circuit.

• A light is produced

• A sound is made

Look at the diagrams of a large rock in a desert.

Explain why the rock looks different after wind erosion.

In your answer write about what happens to:

1. 1. the sand on the ground around the rock

2. 2. the rock.

Only the water plant takes in the toxic substance directly from the water.

Look at the food chain.

Suggest how the toxic substance gets into the bird.