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If a pane of glass is broken it won't put itself back together again. The change is permanent!

# Materials - Changing Things

This Science quiz is called 'Materials - Changing Things' and it has been written by teachers to help you if you are studying the subject at elementary school. Playing educational quizzes is a fun way to learn if you are in the 1st or 2nd grade - aged 6 to 8.

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Materials don’t always stay the same. If you stretch a rubber band, it will bounce back again. But if you chop up a carrot, you can’t put the carrot back together again. When you are baking a cake, the ingredients all look different. But when you mix them together and cook them, they change and become a new material. The cooked cake doesn’t look like any of the ingredients. Let’s find out a bit more about how materials change.

Click on the pictures for a closer look.

1.
Which one of these will go back to how it was?
A broken egg
A mashed potato
A stretched rubber band
A squashed banana
The rubber band can go back to how it was. The other changes are permanent
2.
Joe is blowing up a red balloon. The balloon is getting very big. Joe does not tie the balloon. He lets go of the balloon. It shoots off and all the air comes out. What happens to the size of the balloon?
The balloon goes back to its original size
The balloon gets even bigger
The balloon stays really big
The balloon disappears
Balloons are like springs and rubber bands. They can go back to their original size
3.
Carla is making ice cubes in the freezer. She pours water into the trays. She puts the trays into the freezer. The water freezes into ice.

Later, Carla takes the ice cubes out of the freezer. She leaves them in a warm room. What happens to the ice cubes?
The ice cubes melt back to water
The ice cubes stay frozen
The ice cubes turn into snow
The ice cubes get much bigger
Water can freeze, and then it can melt again
4.
Karen is making a cup of tea. She pours milk into the tea and stirs it. The milky tea is a mixture. What is mixed together?
Milk and coffee
Tea and coffee
Tea and milk
Milk and sugar
Do you like drinking tea or coffee?
5.
Lucy and her dad are making a pizza. What must they do before the pizza is ready to eat?
Put it in the freezer
Put it in the dishwasher
Bake it in the oven
Bake it in the fridge
Do you like pizza? What is your favorite pizza topping?
6.
This candle has been burning for a long time. Some of the wax has melted and run down the sides of the candle. Then the wax has cooled and turned back into a _____.
Solid
Gas
Liquid
Fluid
Do you have candles on your birthday cake?
7.
If you stretch a spring - not too much - the spring gets longer. If you then let go of the spring, what happens?
The spring gets even longer
The spring straightens out
The spring gets shorter again
The spring loses its shape
The spring can go back to its original shape and size
8.
Li cuts a piece of card in two. When she lets go of the two pieces of card, what happens?
The two pieces of card go back together again
The two pieces of card stay separate
The two pieces of card get much bigger
The two pieces of card disappear
Li can stick the pieces back together, but they don’t go back like a spring or a rubber band
9.
The candle is made of wax. The candle is:
Freezing
Boiling
Burning
Getting bigger
As the candle burns, there is less and less candle wax
10.
Danny and Alex are making a cake. The ingredients are flour, butter and eggs. What must they do with the ingredients?
Put the flour in the oven and fry the eggs
Mix the flour, butter and eggs together
Only use the flour
Only use the eggs
Have you ever baked a cake?
Author:  David Bland