1. Compare the two light waves above. Which wave would produce the brightest light and which wave would have the least energy?
a. wave A; wave A
b. wave A; wave B
c. wave B; wave A
d. wave B; wave B
2. Which waves have the longest wavelength and lowest energy on the electromagnetic spectrum?
a. X-rays
b. infrared
c. radio waves
d. gamma rays
3. What is true about X-rays and microwaves?
a. X-rays have greater speed than microwaves.
b. X-rays have greater amplitude than microwaves.
c. X-rays have greater frequency than microwaves.
d. X-rays have greater wavelength than microwaves.
4. The image above shows the movement of a wave over three seconds. What is the frequency of the wave?
a. 2 Hz
b. 5 Hz
c. 1 Hz
d. 3 Hz
5. The wavelength of a longitudinal wave is the distance from,
a. compression to rarefaction.
b. compression to compression.
c. crest to trough.
d. crest to crest.
6. Three light rays encounter a medium. How can light ray B be described?
a. It is reflected.
b. It is absorbed.
c. It is transmitted.
d. It is refracted.
7. What enables sound waves to travel between the boat and the submarine?
a. water waves
b. water particles
c. water currents
d. water ripples
8. What is one reason sound travels faster in liquid water than in air?
a. Air molecules are less elastic than liquid water molecules because air molecules have weaker attractions.
b. Air molecules are more elastic than liquid water molecules because air molecules have weaker attractions.
c. Air molecules are more elastic than liquid water molecules because air molecules have stronger attractions.
d. Air molecules are less elastic than liquid water molecules because air molecules have stronger attractions.
9. What will happen to the majority of sound waves that encounter the medium shown above?
a. They will be transmitted.
b. They will be reflected.
c. They will be refracted.
d. They will be absorbed.
10. Compare the two waves above. They represent two sound waves. Which wave will produce the highest pitch and which wave will produce the loudest sound?
a. wave A; wave A
b. Wave A; wave B
c. wave B; wave A
d. wave B; wave B
1. ?
2. c
3. c
4. ?
5. b
6. d
7. c
8. a
9. ?
10. b
Grade 8 Electromagnetic Radiation
1. Mechanical waves require a medium to travel in; electromagnetic waves do not.
2. radio waves
3. X-rays have greater frequency then microwaves.
4. 3 Hz
5. Longitudinal, transverse, and surface
6. It is reflected.
7. water particles
8. A 10 liter container that has 5000 molecules.
9. They will be absorbed.
10. wave B; wave A
I assure you that these answers are correct relating to the Unit 3 Lesson 3 Quiz with 10 questions. I got 100% and actually found this quiz easier than I expected. Peace! ~ Jules