9. Which process involves a physical change?

a. Frying an egg b. Photosynthesis c. Digestion d. Water cycle


10. Burning a match is an example of a _____________.

a. chemical change b. physical change c. physical property d. chemical property


11. An example of a physical change.

a. Foam and bubbles form after mixing baking soda and vinegar.
b. A glass cup falls from the counter and shatters on the ground.
c. Paper burns up and leaves ashes.
d. A plant uses sunlight and makes food.


12. Which is true about chemical change?

a. It is reversible.
b. It produces new materials.
c. It changes only a material’s color and odor.
d. It does not change a material’s size and shape.


13.An example of a chemical change is

a. an old car rusting
b. cutting a piece of paper
c. throwing a rock
d. crushing a can


14. Which shows a chemical change?

a. Burning candle
b. Chewing a piece of bread
c. Burning a piece or paper
d. Melting a piece of chocolate


15. It is the primary cause of rust because it contains oxygen.

a. carbon dioxide
b. water
c. air
d. hydrogen

16. Rusting of iron made materials is commonly caused by the _____________________.

a. presence of heat
b. absence of heat
c. presence of oxygen
d. absence of oxygen

17. What change takes place when a fruit starts to rot?

a. chemical
b. no change
c. physical
d. absolute


18. Which is NOT TRUE in the statements below?

a. Burning a paper involves a presence of heat.
b. Cutting a banana in half is an example of physical change.
c. Melted candle is a form of chemical change.
d. Freezing a water is a form of physical change.

19. What change will happen if you slice an apple and expose it to oxygen in the air?

a. Color will change from brown to white
b. Color will change from white to brown
c. The color will not change
d. No changes in color

Answer it correctly pls​