a.固体 - ________ b.液体 - ________
c.气体 - ________
a. ________ :固体 液体
b. ________ :液体 气体（速度慢）
c. ________ :液体 气体（速度快）
d. ________ :气体 液体
e. ________ :液体 固体
3. 酸性物质：红色石蕊试纸 ________
4. 中性物质：红色石蕊试纸 ________
5. 碱性物质：红色石蕊试纸 ________
Unit 7 : Heat
1. Which of the following statements is true
A. It can be seen.
B. It can be measured.
C. It is a form of energy.
D. It makes a substance cooler.
2. A beaker of water is on fire. Which of the
statements is true about the water in the
I. The water in the beaker losses heat.
II. The water in the beaker gains heat.
III. The temperature of water in the beaker
IV. The temperature of water in the beaker
A. I and II C. II and III
B. I and IV D. II and IV
3. Which of the following is not used to
B. Clinical thermometer
C. Laboratory thermometer
D. Electronic thermometer
4. What is the unit for temperature?
A. cm C. C
B. kg D. mm
5. There is a pot of hot coffee on the table.
Why does the hot coffee get cooler after
half an hour?
A. Hot water is added into it.
B. It gains heat to the surroundings.
C. It loses heat to the surroundings
6. What are the effects of heat on matter?
I. Heat makes the matter expands.
II. Heat makes the matter contracts.
III. The size of the matter increases.
IV. Matter becomes lighter.
A. I and II C. I, III and IV
B. I and III D. I, II, III and IV
Unit 8 : States of Matter
1. Which of the following statements is not
correct about matter?
A. It has mass.
B. It has volume.
C. It occupies space.
D. Everything around us is not matter.
2. Which of the following statements is not
true about solid?
A. It has fixed mass.
B. It has fixed volume.
C. It has no fixed volume.
D. It cannot be compressed.
3.Which of the following pairs is correct?
4.What is the melting point of ice?
A. -2 C C. 2 C
B. 0 C D. 100 C
What is the process described in
A. Evaporation C. Condensation
B. Boiling D. Melting
6. What is the change of state of water in the
A. Gas Liquid C. Ice Water
B. Liquid Solid D. Water Ice
7. Cong Wei kept his shoes under the sun.
After few hours he observed that his
shoes has dried. What is the process that
A. Boiling C. Condensation
B. Melting D. Evaporation
8. What is the importance of water cycle?
I. To control the temperature of the Earth.
II. To keep the balance of plants.
III. For the survival of the living things.
IV. To avoid the amount of water on the
Earth from drying up.
A. I, II and III C. I, III and IV
B. II, III and IV D. I, II, III and IV