Directions: After reading the selection above, answer the following by writing the letter
of the correct answer on the space provided before each item.
1. Which of the following statements is correct?
A. Waves carry energy.
B. Waves carry nothing.
C. Waves carry both energy and matter.
D. Waves transfer matter from one place to another.
2. Electromagnetic waves
travel through space.
A. can
B. never
C. cannot
D. wish they could
3. Why do you think sunlight can reach the Earth passing through space?
A. because sunlight is a sinusoidal wave
B. because sunlight is a mechanical wave
C. because sunlight is a longitudinal wave
D. because sunlight is an electromagnetic wave
4. Which of the following natural phenomena will help you compare
electromagnetic waves and mechanical waves?
1. flood
II. thunder
III. lightning
IV. earthquake
A. I and II
B. I and III
C. ll and lll
D. lll and Vll
5. You have a slinky stretched on the floor. You move the slinky from side to side while holding one end, and you notice that it swirls from left to right. What does it show
A. surface wave
B. transverse wave
C. electromagnetic wave
D. longitudinal wave
6. If you slightly push and pull a streched slinky in one end, it demonstrates a ___________.
A. surface wave
B. transverse wave
C. electromagnetic wave
D. longitudinal wave
7. Which of the following statements supports that wave is important in our daily lives.
A. Photosynthesis occurs because sunlight can travel in space.
B. We are updated with current events from news throught a televition set.
C. Sound waves allows us to wake up early by making a sound from alarm clocks
D. All of the above
8. When you throw a small rock in the water, ripples of water waves move outwardly without carying the rock. What can you infer in this situation
A. Water is liquid, but rock is solid
B. Water is light, but the rock is heavy
C. Waves transfer energy but do not carry matter
D. None of the above
of the correct answer on the space provided before each item.
1. Which of the following statements is correct?
A. Waves carry energy.
B. Waves carry nothing.
C. Waves carry both energy and matter.
D. Waves transfer matter from one place to another.
2. Electromagnetic waves
travel through space.
A. can
B. never
C. cannot
D. wish they could
3. Why do you think sunlight can reach the Earth passing through space?
A. because sunlight is a sinusoidal wave
B. because sunlight is a mechanical wave
C. because sunlight is a longitudinal wave
D. because sunlight is an electromagnetic wave
4. Which of the following natural phenomena will help you compare
electromagnetic waves and mechanical waves?
1. flood
II. thunder
III. lightning
IV. earthquake
A. I and II
B. I and III
C. ll and lll
D. lll and Vll
5. You have a slinky stretched on the floor. You move the slinky from side to side while holding one end, and you notice that it swirls from left to right. What does it show
A. surface wave
B. transverse wave
C. electromagnetic wave
D. longitudinal wave
6. If you slightly push and pull a streched slinky in one end, it demonstrates a ___________.
A. surface wave
B. transverse wave
C. electromagnetic wave
D. longitudinal wave
7. Which of the following statements supports that wave is important in our daily lives.
A. Photosynthesis occurs because sunlight can travel in space.
B. We are updated with current events from news throught a televition set.
C. Sound waves allows us to wake up early by making a sound from alarm clocks
D. All of the above
8. When you throw a small rock in the water, ripples of water waves move outwardly without carying the rock. What can you infer in this situation
A. Water is liquid, but rock is solid
B. Water is light, but the rock is heavy
C. Waves transfer energy but do not carry matter
D. None of the above
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Answers & Comments
Answer:
1. Which of the following statements are TRUE of sound waves? Identify all that apply.
A sound wave is a mechanical wave.
A sound wave is a means of transporting energy without transporting matter.
Sound can travel through a vacuum.
A sound wave is a pressure wave; they can be thought of as fluctuations in pressure with respect to time.
A sound wave is a transverse wave.
To hear the sound of a tuning fork, the tines of the fork must move air from the fork to one's ear.
Most (but not all) sound waves are created by a vibrating object of some type.
To be heard, a sound wave must cause a relatively large displacement of air (for instance, at least a cm or more) around an observer's ear.
Answer: ABD
a. TRUE - A sound wave transports its energy by means of particle interaction. A sound wave cannot travel through a vacuum. This makes sound a mechanical wave.
b. TRUE - Absolutely! Particles do not move from the source to the ear. Particles vibrate about a position; one particle impinges on its neighboring particle, setting it in vibrational motion about its own equilibrium position.
c. FALSE - Only electromagnetic waves can travel through a vacuum; mechanical waves such as sound waves require a particle-interaction to transport their energy. There are no particles in a vacuum.
d. TRUE - As particles move back and forth longitudinally, there are times when they are very close within a given region and other times that they are far apart within that same region. The close proximity of particles produces a high pressure region known as a compression; the distancing of particles within a region produces a low pressure region known as a rarefaction. Over time, a given region undergoes oscillations in pressure from a high to a low pressure and finally back to a high pressure.
e. FALSE - Never! Waves are either longitudinal or transverse. Longitudinal waves are those in which particles of the medium move in a direction parallel to the energy transport. And that is exactly how particles of the medium move as sound passes through it.
f. FALSE - It is the disturbance that moves from the tuning fork to one's ear. the particles of the medium merely vibrate back and forth about the same location, never really moving from that location to another location. This is true of all waves - they transport energy without actually transporting matter.
g. FALSE - All sound waves are created by vibrating objects of some sort.
h. FALSE - Quite surprisingly to many, most sounds which we are accustomed to hearing are characterized by particle motion with an amplitude on the order of 1 mm or less.
Explanation: