B. gas
4. It is the number of charges passing through a wire per unit time.
A. resistance B. power C. current D. voltage
5. Which of the following is NOT a unit of temperature?
A. Calorie B. Celsius C. Fahrenheit D. Kelvin
6. Which of the following concepts on heat transfer is true
A. Heat is transfer from an object of lower temperature to higher
temperature
B. Heat is transfer from an object of higher temperature to lower
temperature
C. Heat travels in any direction of an object
D. Heat transfers to a less dense objects.
7. The type of battery that you use in a flashlight or toy car is called
A. Charged cell B. Dry cell C. Voltaic cell D. Plant cell
8. Which expands the greatest when heated at the same temperature?
A. solid
C. liquid D. all expand equally
9. Which of the following factors affect the speed of sound in alr?
A. Air temperature
C. Frequency of the sound
B. Loudness of the sound
D. Wavelength of the
sound
10. It supplies energy in an electric circuit.
A. load B. switch C. conducting wire D. voltage source
11. Which of the following statement is true about the relationships between
frequency and wavelength of light?
A. The greater the frequency of light, the greater the wavelength
B. The frequency of light is inversely proportional to its wavelength
C. The frequency of light is directly proportional to its wavelength
D. Light of higher frequency has longer wavelength
12. Among the following colors in a rainbow, which has the least energy?
A. green
B, violet C, red D. yellow
13. Which color has the shortest wavelength?
A. Green B. Red C. vlolet D. yellow​