1. Which will result in a physical change in an egg?
a. frying
b. beating
c. putting it in vinegar

2. Which is not a chemical change?
a. freezing juice to make ice candies
b. bleaching clothes to remove stains
c. using gasoline to make a lawnmower run

3. Which is not a physical change?
a. melting cheese
b. fermenting cheese
c. mixing two kinds of cheese

4. Which activity shows a chemical change in hair?
a. having it cut short
b. having it dyed blonde
c. putting conditioner on it

5. What will most likely happen to the spokes of your bike if you leave them outside in the rain?
a. They will rust.
b. They will break.
c. They will become longer.

6. What physical change is indicated by drops of water that form underneath the lid of a hot pot?
a. boiling
b. melting
c. condensation

7. What chemical change is indicated by a centuries-old copper statue turning into a darker shade?
a. oxidation
b. tarnishing
c. sublimation

8. What chemical change is indicated by methane gas in a stove reacting with oxygen to form flames when you use the stove?
a. evaporation
b. condensation
c. combustion

9. Which will result in a chemical change on a piece of paper?
a. folding the piece of paper
b. burning the piece of paper
c. painting the piece of paper brown

10. At what temperature does water freeze?
a. 0°C
b. 1°C
c. 100°C

II. Read and analyze the statement below. Tell whether each statement show or use any of the 5Rs of waste management. Tick the letter of the best answer.

11. Aizel found her old hair clips and gave them to her little cousins.
a. Recycle
b. Reduce
c. Repair

12. Andrew, instead of buying new shoes for the upcoming competition, washed and fixed his old ones.
a. Repair
b. Recover
c. Reduce

13. Kenneth used paper bags in the grocery instead of plastic bags.
a. Reduce
b. Recycle
c. Recover

14. Mrs. Aquino collected the chicken manure in her poultry farm and gave it to a shop that can convert biodegradable materials into LPG.
a. Reuse
b. Reduce
c. Recover

15. Geraldine’s school always collects old papers to be used as scratch papers.
1 point
a. Repair
b. Recover
c. Recycle

16. During Christmas, Sophia and her friends made a Christmas lantern made purely of mussel shells and candy wrappers.
a. Recycle
b. Repair
c. Reduce

17. Leila bought good vegetables only enough for her one-day meal.
a. Reduce
b. Reuse
c. Recover

18. Shania opens a garage sale in her place to sell her old furniture.
a. Recycle
b. Recover
c. Repair

19. Andy always brings his water tumbler every time he buys juice from the canteen.
a. Reuse
b. Reduce
c. Recover

20. Instead of throwing away all the soft drink cans he bought, Xian used them as pots for his plants.
a. Repair
b. Reduce
c. Recycle

III. Identify which product these materials can be transformed. Tick the letter with your best answer.

21. old newspaper
a. flower pot
b. trash bin
c. paper bag

22. glass jar
a. spice container
b. trash bin
c. flower pot

23. plastic bottle
a. flower pot
b. trash bin
c. spice container

24. biscuit tin can
a. spice container
b. trash bin
c. paper bag

25. small milk can
a. trash bin
b. paper bag
c. pencil holder