Instructions
Read each question carefully and write your answer in the space provided. Try your best to answer all the questions!
A1. Multiple Choice
Circle the best answer for each question.
1. Which of these materials is easy to bend?
a) A glass window
b) A wooden log
c) A paper clip
2. When you stretch a rubber band and let it go, it returns to its original shape. This means the rubber band is:
a) Hard
b) Elastic
c) Melted
3. What happens to an ice cube when you heat it?
a) It freezes
b) It melts
c) It twists
4. Which action is an example of twisting?
a) Squeezing a sponge
b) Wringing out a wet towel
c) Bouncing a ball
5. If you cool liquid water to a very low temperature, it will turn into:
a) Steam
b) Ice
c) A puddle
6. Which of these materials will keep its new shape after you squash it?
a) A spring
b) A tennis ball
c) A lump of play-doh
7. Cooking an egg changes it forever. This change is:
a) Reversible
b) Irreversible
c) Elastic
8. Which of these is NOT a way to change the shape of an object?
a) Bending
b) Looking at it
c) Stretching
9. What happens to chocolate when it gets hot?
a) It gets harder
b) It melts
c) It freezes
10. A metal fork is hard to bend, but a plastic fork is easier. This shows that:
a) All forks are the same
b) Different materials have different properties
c) Plastic is a type of metal
A2. True or False
Circle 'True' or 'False' for each statement.
11. You can change the shape of a rock by squashing it with your hands. True / False
12. A sponge is an elastic material. True / False
13. Heating always makes materials harder. True / False
14. Twisting a piece of paper changes its shape. True / False
15. When water freezes into ice, you can melt it back to water. This is a reversible change. True / False
16. A wooden ruler cannot be bent at all. True / False
17. Cooling melted chocolate will make it solid again. True / False
18. A glass bottle is very elastic. True / False
19. Stretching means to pull something to make it longer. True / False
20. Burning wood is an example of changing a material with heat. True / False
A3. Fill in the Blanks
Choose the correct word from the word bank to complete each sentence.
stretch elastic freezes clay twist
21. When you bend or squash something, you change its _______________.
22. A rubber band is _______________ because it goes back to its original shape.
23. You can _______________ a rope to make it shorter and tighter.
24. To turn liquid water into ice, you must _______________ it.
25. An ice cream _______________ in the sun.
26. We use _______________ to cook food.
27. When liquid wax from a candle cools down, it turns _______________.
28. You can _______________ a spring to make it longer.
29. _______________ is a material that stays in a new shape when you mould it.
30. When water gets very cold, it _______________ into ice.
Write a short answer for each question.
1. Name one object you can easily bend. _________________________
2. Name one object that is hard to bend. _________________________
3. What happens to the shape of a paper towel when you twist it? _________________________
4. Name an object that is elastic. _________________________
5. What does it mean for a material to be 'elastic'? _________________________
6. What do you use to melt butter? _________________________
7. What happens to bread when you toast it? _________________________
8. Is toasting bread a reversible change? Why or why not? _________________________
9. Name one material that freezes when it gets cold. _________________________
10. Name one material that melts when it gets hot. _________________________
11. How can you change the shape of a piece of aluminum foil? Name two ways. _________________________
12. Look at this diagram. What is happening to the straight line?
13. What is one way to change the shape of a sponge? _________________________
14. If you squash a sponge and let go, what happens? _________________________
15. What change happens to cake batter when you bake it in an oven? _________________________
16. Can you change the baked cake back into batter? _________________________
17. Name something you might stretch in a gym class. _________________________
18. What happens if you leave a wax crayon in the hot sun? _________________________
19. How can you turn melted wax back into solid wax? _________________________
20. Look at the diagram. What is happening to the object?
Think about the problem and write your answer.
1. You have a straight piece of wire. You need to make a hook to hang a picture. What do you need to do to the wire?
_________________________________________________________________
2. Your friend says that if you melt a snowman, you can never get the water to be solid again. Is your friend right? Explain why.
_________________________________________________________________
3. You are given a ball of clay. Describe two different shapes you can make with it.
_________________________________________________________________
4. You accidentally leave a chocolate bar in a hot car. What will it look like when you find it? Why did this happen?
_________________________________________________________________
5. You have a new t-shirt that is very wrinkly. How can you use heat to change the t-shirt and remove the wrinkles?
_________________________________________________________________
6. A recipe for jelly says to mix powder with hot water and then put it in the fridge. Why does the jelly need to go in the fridge?
_________________________________________________________________
7. You want to make a small boat out of paper. What can you do to the flat paper to make it float and hold a small toy?
_________________________________________________________________
8. Imagine you have a Slinky toy (a spring). Name two ways you can change its shape while you play with it.
_________________________________________________________________
9. If you mix sugar in warm water, it disappears (dissolves). This is a change. How is this change different from cooking an egg?
_________________________________________________________________
10. You need to get juice out of an orange half without a juicer. What two actions could you use to squeeze the juice out?
_________________________________________________________________
Answer Key
A1. Multiple Choice
- c) A paper clip
- b) Elastic
- b) It melts
- b) Wringing out a wet towel
- b) Ice
- c) A lump of play-doh
- b) Irreversible
- b) Looking at it
- b) It melts
- b) Different materials have different properties
A2. True or False
- False
- True
- False
- True
- True
- False (It can bend a little before snapping)
- True
- False
- True
- True
A3. Fill in the Blanks
- shape
- elastic
- twist
- cool
- melts
- heat
- solid
- stretch
- clay
- freezes
- (Sample answers: paper, straw, wire, cooked noodle)
- (Sample answers: a brick, a metal pole, a thick book)
- It becomes long, thin, and wrinkled.
- (Sample answers: a rubber band, a spring, a hair tie, a sponge)
- It can return to its original shape after being stretched or squashed.
- Heat (from a stove or microwave).
- It becomes brown, hard, and crispy.
- No, because you cannot change the toast back into soft bread.
- Water / Juice
- (Sample answers: ice, chocolate, butter, wax)
- (Sample answers: Crumple it, fold it, tear it)
- It is bending.
- (Sample answers: Squash it, squeeze it, twist it)
- It goes back to its original shape.
- It turns from a liquid batter into a solid cake.
- No.
- (Sample answers: a resistance band, my muscles)
- It will melt.
- Let it cool down.
- It is being squashed or compressed.
- You need to bend the wire into a hook shape.
- No, my friend is not right. You can freeze the water again to make it solid ice.
- (Sample answers: I can roll it into a ball. I can flatten it into a pancake. I can make a long snake.)
- It will be a melted puddle of chocolate. This happened because the heat in the car melted it.
- You can use a hot iron to press the wrinkles out.
- Cooling the liquid jelly mixture makes it turn solid.
- You can fold the paper to make the sides and bottom of a boat.
- (Sample answers: I can stretch it. I can squash it (compress it).)
- You can get the sugar back by evaporating the water (a reversible change), but you cannot un-cook an egg (an irreversible change).
- You could squash it with your hand and twist it at the same time.