Read each question carefully then encircle the letter of the correct answer. 1. It is a part of the air that surrounds us. It is used by the body to continue life. It also has effects on different materials.
a Oxygen
b. Carbon
c. Nitrogen
d. Carbon Dioxide
2. How does a physical change differ from a chemical change?
a New properties of the matter are observed.
b. New materials are produced.
c. The change always involves heat or light
d. The composition of the matter is unchanged.
3. Which of the following signs does NOT indicate that a chemical change has happened?
a. only a change in state
b. change in color or odor
c. foaming or bubbling
d production of heat or light
4. When the matchstick was burned, what will happen?
a. there was a change in color, smell and substance
b. It remains the same
c. there was no change physically and chemically
d. None of the above
5. Matter could be changed chemically due to
a. Application of heat
b. Application of change
c. cold resistance
d. Absence of heat
6. When matchstick is bumed, it turns to a. Charcoal
b. wood
c. plastic
d. wax
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Answer:
1.A
2.C
3.A
4.A
5.B
6.B
Explanation:
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