About this changing states practice

Changing states is taught in KS2 Year 4 (ages 8-9) as part of the England national curriculum. This free practice set covers understanding melting, freezing, evaporation and condensation, and the water cycle through 30 interactive questions, working up from easy warm-ups to harder problems.

What you'll practise

Each session gives you 30 questions in mixed difficulty: a few simple ones to start, some two-step questions next, then word problems at the end. If you get stuck, tap for a hint. After every answer you get a short explanation, right or wrong, so you can see why.

Question types in this set: drag-to-order, multiple choice, fill the blank, true or false, word matching.

Example question

What is it called when a solid turns into a liquid?

Curriculum coverage

This is on the KS2 Science programme of study for Year 4. The questions follow the same order schools use, starting with concrete examples and moving on to more abstract reasoning, so practice here lines up with what your child is doing in lessons. British English throughout, with British units, currency and spelling.

Frequently asked questions

What is changing states in KS2 science?

Understanding melting, freezing, evaporation and condensation, and the water cycle. It is on the KS2 science curriculum for Year 4 and gets revisited in later years too.

What year group is changing states taught in?

Changing states is first introduced in Year 4. Children usually meet it again in later years as the work gets harder.

Is the changing states practice really free?

Yes. All 30 questions are free, with no signup, no payment and no time limit. Your progress is saved in your browser.

How does the practice work?

Each session gives you 10 questions of mixed difficulty. Correct answers add 8 to 12 points to your SmartScore; wrong answers take some off. Get to 80 to mark the concept as complete. Hints are there if you need them, and every answer comes with a short explanation.

Related science concepts

• 💧States of matter
• 🔊Sound
• ⚡Electricity & circuits
• 🌿Living things & habitats

More practice by year

• Year 4 practice
• All Science concepts

Practice content matched to the England national curriculum for KS2 (Year 4). Questions use British English throughout.