Direction: Read the questions carefully. Choose the letter of the correct answer.
1. Some materials allow the flow of electricity. What do you call materials that allow
electrons to flow more freely.
A. Electricity B. conductor C. insulator D. electrons
2. Some materials do not conduct the flow of electricity, they are called insulators. An
example of an insulator is
A Gold
B. rubber
C. bronze
D. copper wire
3. When light bounces off a smooth and shiny surface, the process that occurs is
a. Reflection b. refraction c. transmission de polarization
4. Objects that allow light to pass through them are
a. Glass
b. transparent c. translucent
d. opaque
5. The surface of a wooden boat does not reflect light like the surface of the water
because
a. the boat surface is rough and absorbs more light
b. because the surface of the boat is red not blue
c. the boat is not a natural object like the water
d. the boat is on top of the water's surface
6. Sound can travel in all except
a. water
b. space
c. metals
d. rubber
7. A tone that is higher in pitch is higher in what characteristics?
a frequency b. loudness
d. wavelength
8. Which one will be affected if the frequency increases?
a. frequency b. loudness
C. resonance d. wavelength
9. Tightening the string in a violin will make the pitch
a. higher
b. lower
c. quieter
d. louder
10. If the temperature of air becomes higher, what happens to the speed of the sound?
a. it increases b. it decreases c. it does not change d. it varies
11. Objects that reflect some light and transmit some light are called
a. Colored
b. opaque
c. translucent d. transparent
12. Objects appear fuzzy through a material that is
a. Colored
b. opaque
c. translucent d. transparent
C. resonance​