4. It is the characteristics of a material that can be observed WITHOUT changing its chemical composition.

a. physical property

b. chemical property

c. appearance

d. phases of matter

5. Which among the physical properties of materials refers to the ability to reflect light?

a. brittleness

b. hardness

c. conductivity

d. luster

6. It is the ability to catch fire easily.

a. combustibility

b. flammability

c. biodegradability

d. nonbiodegradability

7. The ability to allow heat and electricity pass through it.

a. conductivity

b. oxidation

c. elasticity

d. rusting

8. The ability of the material to decompose.

a. compost

b. conductivity

c. non-biodegradability

d. biodegradabiltiy

9. The characteristics of the materials can be observed when the composition of the material CHANGES.

a. physical property

b. chemical property

c. biodegradability

d. combustibility

10. It is the ability of the material to return to its original size and shape without breaking.

a. brittleness

b. ductility

c. flexibility

d. elasticity​