KS2 SATs KS2 Science Extended — Questions and Answers
Question 1: What is the difference between a conductor and an insulator in electricity?
- A conductor blocks electricity; an insulator allows it to flow
- A conductor allows electricity to flow through it; an insulator does not (Correct answer)
- Both conduct electricity equally
- Neither conducts electricity
Correct answer: A conductor allows electricity to flow through it; an insulator does not
An electrical conductor (e.g. copper, iron) allows electric current to flow through it easily. An insulator (e.g. plastic, rubber, wood) resists current flow and is used to coat wires for safety.
Question 2: What is the name of the process by which plants lose water through their leaves?
- Condensation
- Transpiration (Correct answer)
- Evaporation
- Absorption
Correct answer: Transpiration
Transpiration is the process by which water moves through a plant and evaporates from the leaves through tiny pores called stomata. It helps draw water up from the roots and cools the plant.
Question 3: What are the main components of blood?
- Only red blood cells
- Red blood cells, white blood cells, platelets, and plasma (Correct answer)
- Water and oxygen
- Glucose and minerals only
Correct answer: Red blood cells, white blood cells, platelets, and plasma
Blood is made up of four main components: red blood cells (carry oxygen), white blood cells (fight infection), platelets (help clotting), and plasma (the liquid that carries everything).
Question 4: What is a food web?
- A single food chain
- Several food chains linked together showing feeding relationships in an ecosystem (Correct answer)
- A list of all the animals in a habitat
- A diagram showing only predators
Correct answer: Several food chains linked together showing feeding relationships in an ecosystem
A food web shows many interconnected food chains within an ecosystem. It illustrates the complex feeding relationships between producers and consumers, showing that most animals eat more than one thing.
Question 5: What is the name for the natural satellite that orbits the Earth?
- A comet
- A star
- The Moon (Correct answer)
- A planet
Correct answer: The Moon
The Moon is Earth's only natural satellite. It orbits the Earth approximately every 27.3 days. We see different phases of the Moon as different portions of its sunlit surface face Earth.
Question 6: What does 'adaptation' mean in biology?
- An animal moving to a new habitat
- A feature that helps an organism survive in its environment (Correct answer)
- A change in the weather
- An animal learning a new skill
Correct answer: A feature that helps an organism survive in its environment
An adaptation is a physical or behavioural feature that has evolved to help an organism survive and reproduce in its particular environment. For example, a polar bear's white fur is an adaptation for camouflage in snow.
KS2 SATs KS2 Science Extended
What is the difference between a conductor and an insulator in electricity?