1. The transfer of heat in solid materials is called
A convection
B. insulator C. conduction
2. A heat transfer across an empty space or vacuum is called
A conduction
B. connection
C. radiation
D. conductor
3. A heat that travels through air and water is called
A conductor
B. radiation C. convection
D. conduction
4. It serves as good conductor.
A wood
B. plastic
C. metal
D. water
5. What is the direction of heat transfer?
A from hot to cold B. from cold to hot C. from side to side D. from bottom to top
6. What may happen to a solid when it is continuously exposed to beat?
A. it may melt
C. it may become heavier
B. it may expand
D. it may decrease in volume
7. Light always travels in
when going through a single medium.
A. curve line
B. straight line
C. diagonal line D. wavy line
8. A narrow but powerful beam of light that can travel long distances and still focus on a
small area.
A. flashlight B. laser
C. light bulb
D. study table lamp
9. A transparent material that transmits visible, ultraviolet, and infrared light.
A flashlight B. laser
C. optical fiber D. fluorescent light
10. Which of the following is NOT the use of light?
A. Light is use to hear different sounds.
B. Light helps people to see things around.
C. Laser light is use in printers and scanners.
D. Light is use in communication, medicine and industry.​