Year 4 States of Matter Worksheet - Intermediate

Year 4 States of Matter worksheet for Year 4 (Key Stage 2 / Year 3-6 (Ages 7-11)). Intermediate level science practice, aligned to the UK National Curriculum. Print-ready with answer key included.

Science•Key Stage 2 / Year 3-6 (Ages 7-11)•Materialsintermediate

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States of Matter: From Ice to Water Vapour

Year 4 • Ages 8–9 • Intermediate

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Instructions: Explore how materials behave as solids, liquids and gases, and how heating and cooling can change their state. Read each question carefully and write your answers in the boxes. Use the water-cycle clues to connect these changes to the world around you.

Solid, Liquid or Gas?

Decide which state of matter best describes each substance at room temperature. Think about whether it keeps its shape, flows, or spreads out to fill its container.

1. An ice cube:

2. Milk in a glass:

3. Air inside a balloon:

4. A wooden ruler:

5. Water vapour in the air:

What Happens When Matter Changes?

Choose the best answer for each question. Think about what happens to a material when it is heated or cooled.

1. What happens to ice as it warms and becomes liquid water?

2. What happens to liquid water when it cools enough to become ice?

3. Which change happens when liquid water gains heat and becomes water vapour?

4. What is condensation?

5. At what temperature does pure water freeze and ice melt?

Heating and Cooling Clues

Use each clue to name the change of state. The word bank contains the four changes you need; use each word where it fits best.

Word bank: melting, freezing, evaporation, condensation

1. A puddle slowly changes into water vapour on a warm day.

2. Water vapour cools and forms tiny liquid droplets on a cold window.

3. Chocolate warms and changes from a solid into a liquid.

4. Liquid water cools and becomes solid ice.

Water-Cycle Data Detectives

Read the table, then answer the questions below it. The temperatures show how the water changed state during a classroom demonstration.

Stage	What was observed	Temperature	State change
Ice warming	Ice became liquid	0°C	Melting
Water heating	Water became vapour	100°C	Evaporation
Water vapour cooling	Droplets formed	18°C	Condensation
Water cooling	Water became ice	0°C	Freezing

1. At what temperature did the ice become liquid?

2. Which stage showed condensation?

3. What state change happened when the water became ice?

4. Which observation showed water changing into a gas?

Follow a Drop Around the Water Cycle

Complete each sentence with the correct water-cycle process. Use the word bank, and remember that the Sun provides heat that helps water evaporate.

Word bank: evaporation, condensation, precipitation, collection

1. The Sun heats water in seas and lakes, and liquid water changes into water vapour by ___.

2. Water vapour cools high in the air and forms clouds by ___.

3. Water falls from clouds as rain, snow or hail; this is called ___.

4. Water gathers in rivers, lakes and seas during ___.

Explain the Changes

Answer in a short sentence or phrase. Use the ideas from the activities to explain what happens to water in each situation.

1. Why can a liquid take the shape of its container but a solid usually cannot?

2. A cold drink can develop water droplets on the outside. Where do the droplets come from, and what change of state forms them?

3. How does the Sun help water move from a lake into the air as part of the water cycle?

4. Name one example of melting and one example of freezing in everyday life.

Answer Key

Activity 1: solid ; liquid ; gas ; solid ; gas

Activity 2: It melts ; It freezes ; Evaporation ; A gas changing to a liquid ; 0°C

Activity 3: evaporation ; condensation ; melting ; freezing

Activity 4: 0°C ; Water vapour cooling ; Freezing ; Water became vapour

Activity 5: evaporation ; condensation ; precipitation ; collection

Activity 6: 1. A liquid flows and takes the shape of its container; a solid keeps its own shape. 2. The droplets come from water vapour in the air; condensation changes the gas into liquid droplets. 3. The Sun heats liquid water, causing evaporation into water vapour. 4. Examples: ice cream melting; water freezing into ice.