• Choose the correct answer!
1. The followings are the SI units in CGS, except…
a. Centimeter c. Gram
b. Meter d. Second
2. Which of the followings is the unit of derived quantities?
a. Kilogram c. Meter per second
b. Candela d. Ampere
3. The instrument for measuring mass is…
a. Spring balance
b. Ampere meter
c. Double-beam balance
d. Micrometer screw
4. Pay attention to the following statements!
(1) The unit of length is decimeter
(2) The unit of electric current is ampere
(3) The unit of speed is meter per hour
(4) The unit of density is kilogram per meter cubic
The correct statements are…
a. (1) and (2)
b. (2) and (4)
c. (1) and (4)
d. (3) and (4)
5. Force is derived from the base quantities of…
a. Length, mass, and time
b. Length, mass, and path
c. Time, mass, and force
d. Time and acceleration
6. The instrument for measuring the outside diameter of an object is…
a. Micrometer screw gauge
b. Microwave
c. Vernier caliper
d. Ruler
7. Look at the following statements!
(1) There are no spaces between particles
(2) There are attractive forces between particles
(3) Particles are idle, they move and vibrate only at a certain time
(4) Particles are not idle, they always vibrate
The true statements about the properties of particles are…
a. (1) and (2) c. (1) and (4)
b. (2) and (4) d. (3) and (4)
8. Mercury does not wet the container’s wall because…
a. The cohesion of mercury is smaller than the adhesion between mercury and its container
b. The cohesion of mercury is bigger than the adhesion between mercury and its container
c. The cohesion of mercury is equal to the adhesion between mercury and its container
d. Cohesion and adhesion do not affect the ability of a matter to wet its container
9. On a rainy season, the part of a wall which is near to the ground looks wet, due to…
a. Diffusion c. osmosis
b. Capillarity d. surface tension
10. The density of an object os 0.8 g/cm3. The density of the object expressed in the SI unit is…
a. 800 kg/m³ c. 8 kg/m³
b. 80 kg/ m³ d. 0.8 kg/m³
11. An object has a volume of 20 cm³. If the density of the object is 2.4 g/cm³, then its mass is…
a. 0.48 gram c. 48 grams
b. 4.8 gram d. 480 grams
12. The reason why we cannot use water as a thermometric material is…
a. The temperature range of water is too high
b. The scale reading is fluctuated
c. The water does not wet the thermometer tube’s wall
d. The volume of water changes slightly due to temperature alteration
13. The absolute zero is…
a. The temperature when a gas transforms into liquid
b. The temperature of a melting ice
c. The temperature of a freezing brine
d. The temperature when particles stop moving
14. 20° Celsius is equal to …°R
a. 10° c. 20°
b. 16° d. 30°
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