Mixed Deck — All PSLE Topics Flashcards

How many faces does a triangular prism have?

Answer: 5

A triangular prism has 5 faces: 2 triangular faces and 3 rectangular faces.

What does a thermometer measure?

Answer: Temperature

A thermometer measures temperature, which indicates how hot or cold something is.

Which material is a good insulator of heat?

Answer: Wood

Wood is a poor conductor of heat (good insulator), which is why pot handles are often made of wood to prevent burns.

A man is 4 times as old as his son. In 10 years, the man will be 3 times as old as his son. How old is the son now?

Answer: 20

Let son's age = x. Man's age = 4x. In 10 years: 4x + 10 = 3(x + 10). 4x + 10 = 3x + 30. x = 20.

Which word is an adjective in: 'The tall boy climbed the tree'?

Answer: Tall

'Tall' is an adjective because it describes the noun 'boy', telling us about his height.

What form of energy does a moving car have?

Answer: Kinetic energy

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

What is the function of white blood cells?

Answer: To fight germs and diseases

White blood cells are part of the immune system. They fight bacteria, viruses, and other pathogens that enter the body.

In a passage, supporting details serve to:

Answer: Provide evidence or examples for the main idea

Supporting details give evidence, examples, or reasons that back up and develop the main idea of a paragraph.

Ahmad has 248 stickers. He gives 59 stickers to each of his 3 friends. How many stickers does Ahmad have left?

Answer: 71

Ahmad gives away 59 × 3 = 177 stickers. 248 − 177 = 71 stickers remaining.

What is a summary?

Answer: A brief statement of the main points

A summary is a brief, concise retelling that captures only the main points and key ideas without unnecessary details.

What is the purpose of dialogue in a story?

Answer: To reveal characters' thoughts, feelings, and advance the plot

Dialogue reveals what characters think and feel, shows relationships between characters, and helps move the story forward.

A shop sold 1,256 bottles of water on Monday and 2,387 bottles on Tuesday. How many bottles were sold in total?

Answer: 3,643

1,256 + 2,387 = 3,643 bottles in total.

What is the process by which seeds are spread to new locations?

Answer: Seed dispersal

Seed dispersal is how seeds are spread away from the parent plant by wind, water, animals, or explosive mechanisms.

What is an adaptation?

Answer: A feature that helps an organism survive in its environment

An adaptation is a physical feature or behaviour that helps an organism survive and reproduce in its specific environment.

Convert 0.75 to a fraction in simplest form.

Answer: 3/4

0.75 = 75/100 = 3/4 after dividing both numerator and denominator by 25.

Which of the following is NOT a physical change?

Answer: Iron rusting when exposed to water

Iron rusting is a chemical change because a new substance — iron oxide (rust) — is formed.

Which statement best describes particles in a liquid?

Answer: Particles are close together but can flow and move past each other

In a liquid, particles are close together but have enough energy to flow and move past one another, giving liquids a definite volume but no fixed shape.

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

Answer: The shadow gets larger

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

The ratio of boys to girls in a class is 3:5. If there are 24 boys, how many students are there in total?

Answer: 64

3 parts = 24, so 1 part = 8. Girls = 5 × 8 = 40. Total = 24 + 40 = 64.

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

Answer: Melting ice

Melting ice is reversible — ice can melt to water and water can freeze back to ice. Burning and cooking cannot be reversed.