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. 

Grades 1 and 2 - Science - Elementary School - Materials - Changing Things

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10 Questions

1. 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 turn into snowThe ice cubes get much biggerThe ice cubes stay frozenThe ice cubes melt back to water

2. 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 _____.

GasFluidLiquidSolid

3. Lucy and her dad are making a pizza. What must they do before the pizza is ready to eat?

Put it in the dishwasherBake it in the ovenBake it in the fridgePut it in the freezer

4. The candle is made of wax. The candle is:

Getting biggerFreezingBoilingBurning

5. 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 gets even biggerThe balloon disappearsThe balloon stays really bigThe balloon goes back to its original size

6. 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?

Tea and milkMilk and sugarMilk and coffeeTea and coffee

7. Which one of these will go back to how it was?

A mashed potatoA broken eggA stretched rubber bandA squashed banana

8. 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 eggsOnly use the flourOnly use the eggsMix the flour, butter and eggs together

9. 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 stay separateThe two pieces of card go back together againThe two pieces of card disappearThe two pieces of card get much bigger

10. 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 shorter againThe spring gets even longerThe spring straightens outThe spring loses its shape