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  1. Science
  2. Year 4
  3. States of Matter
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Heating Materials 1

In this worksheet students are asked to consider the effects of heating different materials and how they change.

'Heating Materials 1' worksheet

Key stage:  KS 2

Curriculum topic:  States of Matter

Curriculum subtopic:  Heating and Cooling

Difficulty level:  

down

Worksheet Overview

QUESTION 1 of 10

You use lots of materials every day. What happens when some of them are heated? Do they change? How? What's left?

 

In this worksheet, there are several materials for you to think about; for example, what happens when you heat a piece of bread? You get toast - yum!

 

Let's find out....

 

What happens when CLAY is heated?

it melts

it stays the same

it becomes hard

 

What happens when WATER is heated?

it melts

it stays the same

it boils

 

What happens when CHOCOLATE is heated?

it melts

it stays the same

it freezes

 

What happens when A POTATO is heated?

it melts

it stays the same

it goes soft

 

What happens when A CANDLE is heated?

it melts

it stays the same

it boils

 

What happens when A SPONGE-CAKE MIXTURE is heated?

it melts

it stays the same

it rises

 

What happens when A MUG is heated?

it melts

it stays the same

it catches fire

Here is an egg before it's been cooked:

 

 

Here's the egg after it's been cooked:

 

 

What do you think will happen to the egg when it cools down after cooking?

it goes back to being runny

it stays the same as when it was cooked

it turns brown and smells

  • ANSWERS
  • Question 1

 

What happens when CLAY is heated?

CORRECT ANSWER
it becomes hard
EDDIE SAYS
Clay is what china and pottery is made from, so when it is heated (called "firing") it becomes hard. Pots are made on a wheel and put in a special oven called a kiln which heats them up and hardens them.
  • ANSWERS
  • Question 2

 

What happens when WATER is heated?

CORRECT ANSWER
it boils
EDDIE SAYS
Put water in a saucepan on a hob and watch - or try the kettle, if it's see-through. As the water gets hot it produces bubbles from the bottom. More and more bubbles, hotter and hotter, till all the water's jumping around - that's boiling hot!
  • ANSWERS
  • Question 3

 

What happens when CHOCOLATE is heated?

CORRECT ANSWER
it melts
EDDIE SAYS
Take a square of chocolate (DON'T EAT IT!) and hold it in your hand. As it warms up what happens? It starts to go all runny - that's melting, because it's turning into a liquid. Now you can lick it off your hand!
  • ANSWERS
  • Question 4

 

What happens when A POTATO is heated?

CORRECT ANSWER
it goes soft
EDDIE SAYS
When potatoes are boiled in water, or heated in the oven, the heat changes them into a soft material. That makes potatoes nice to eat - they're hard to eat raw!
  • ANSWERS
  • Question 5

 

What happens when A CANDLE is heated?

CORRECT ANSWER
it melts
EDDIE SAYS
Candles are made of a material called wax. When wax is heated it starts to go runny - that means it is melting into a liquid. Next time you see a candle burning, look for the molten wax being made next to the flame.
  • ANSWERS
  • Question 6

 

What happens when A SPONGE-CAKE MIXTURE is heated?

CORRECT ANSWER
it rises
EDDIE SAYS
Sponge-cake mixture is made from ingredients like flour, butter and eggs. When the mixture is heated in the oven something amazing happens: it rises up and bakes into a lovely fluffy sponge (well, it does if you get it right!).
  • ANSWERS
  • Question 7

 

What happens when A MUG is heated?

CORRECT ANSWER
it stays the same
EDDIE SAYS
A mug is what you put drinks into, both hot and cold. It's made from china which is pretty heatproof, so the mug shouldn't change - it's designed to get hot without breaking or changing.
  • ANSWERS
  • Question 8

Here is an egg before it's been cooked:

 

 

Here's the egg after it's been cooked:

 

 

What do you think will happen to the egg when it cools down after cooking?

CORRECT ANSWER
it stays the same as when it was cooked
EDDIE SAYS
Raw egg is very runny but when it's heated it goes much harder. When the egg is cooked, if it's left to go cold, it just stays the same. After all, that's what hard-boiled eggs are - eggs that have been boiled and have cooled down.
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