KS2 SATs KS2 Science 3

Question 1

What is the food chain called where it starts with dead or decaying matter?

Accepted Answer

Decomposer food chain

Answer

A decomposer food chain begins with dead organic matter (detritus), which is broken down by decomposers such as bacteria and fungi. This returns nutrients to the soil for plants to use.

Question 2

Which planet is closest to the Sun in our solar system?

Accepted Answer

Mercury

Answer

Mercury is the closest planet to the Sun. The order of planets from the Sun is: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune.

Question 3

What does a thermometer measure?

Accepted Answer

Temperature

Answer

A thermometer measures temperature, usually in degrees Celsius (°C) in the UK. Digital and mercury/alcohol thermometers work by sensing heat energy. They are used in weather, cooking, and medicine.

Question 4

What type of skeleton do insects have?

Accepted Answer

An exoskeleton (external skeleton)

Answer

Insects have an exoskeleton — a hard outer shell (made of chitin) that supports and protects their body. Unlike vertebrates, the skeleton is on the outside. They must moult (shed) as they grow.

Question 5

Which organ removes waste products from the blood in the form of urine?

Accepted Answer

Kidneys

Answer

The kidneys filter waste products (particularly urea) and excess water from the blood. The resulting liquid (urine) passes to the bladder and is excreted. Humans have two kidneys.

KS2 SATs Practice Test

KS2 SATs Practice Test

KS2 SATs KS2 Science 3