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Physical Changes

Students test their knowledge of physical, reversible changes and check their understanding of the key vocabulary.

'Physical Changes' worksheet

Key stage:  KS 2

Curriculum topic:  Properties and Changes of Materials

Curriculum subtopic:  Reversible Changes

Difficulty level:  

down

Worksheet Overview

QUESTION 1 of 10

   

 

Materials change between, solids, liquids and gases:

 

  melting   evaporation  
     
SOLID   LIQUID   GAS
     
  freezing   condensation  

 

 

These are physical changes which can be reversed. When materials change in this way, it is called changing state. To be able to talk about and describe these changes, we must understand the science vocabulary associated with each of the physical changes.

A solid changing to a liquid is called...

runny

frozen

melting

evaporating

Liquids at room temperature are melted solids. Which THREE of these materials are liquids?

butter

olive oil

gravy

toffee

mercury

When a liquid changes to a gas we say it is....

becoming invisible

condensing

stretching

evaporating

getting smaller

 

Some liquids evaporate into gases much quicker than others. This quick-drying property can be observed in which THREE of these liquids?

perfume

nail varnish

engine oil

roll-on deoderant

treacle

FREEZING describes which of these reversible changes?

gas to liquid

liquid to solid

solid to liquid

liquid to gas

THREE of these materials, which are solid at room temperature, are frozen liquids.

 

Which are they?

wax

concrete

copper

ceramic

butter

Which TWO physical changes of state occur as a result of losing heat / energy?

condensing

goose pimples

freezing

Condensing describes which physical change?

making soup

liquid to gas

gas to liquid

Which TWO of these contain condensed gas? 

helium balloon

blow torch

lighter

bicycle tyres

Which TWO physical changes of state occur as a result of gaining heat / energy?

evaporating

sweating

melting

  • Question 1

A solid changing to a liquid is called...

CORRECT ANSWER
melting
  • Question 2

Liquids at room temperature are melted solids. Which THREE of these materials are liquids?

CORRECT ANSWER
olive oil
gravy
mercury
EDDIE SAYS
Mercury is the ony METAL which is liquid at room temperature. As it gets cooler, olive oil becomes cloudy and eventually solid!
  • Question 3

When a liquid changes to a gas we say it is....

CORRECT ANSWER
evaporating
  • Question 4

 

Some liquids evaporate into gases much quicker than others. This quick-drying property can be observed in which THREE of these liquids?

CORRECT ANSWER
perfume
nail varnish
roll-on deoderant
EDDIE SAYS
Designers and manufacturers use this property when they make their products. See if you can find some more examples at home!
  • Question 5

FREEZING describes which of these reversible changes?

CORRECT ANSWER
liquid to solid
  • Question 6

THREE of these materials, which are solid at room temperature, are frozen liquids.

 

Which are they?

CORRECT ANSWER
wax
copper
butter
EDDIE SAYS
Wax candle melts to liquid wax. Metals melt at very high temperatures. Fats, such as butter, melt to become oils.
  • Question 7

Which TWO physical changes of state occur as a result of losing heat / energy?

CORRECT ANSWER
condensing
freezing
  • Question 8

Condensing describes which physical change?

CORRECT ANSWER
gas to liquid
  • Question 9

Which TWO of these contain condensed gas? 

CORRECT ANSWER
blow torch
lighter
EDDIE SAYS
Air in bicycle tyres is compressed.
  • Question 10

Which TWO physical changes of state occur as a result of gaining heat / energy?

CORRECT ANSWER
evaporating
melting
---- OR ----

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