Waves and Its Parts, Characteristics and structure. Science 7-3rd quarter

1. waves
Science 7

2. Activity 1

3. Things to bring
• Balloon (1)
• Salt
• Ribbon (group color)
• Rope
• Can

4. Draw the movement of the rope
Draw the movement of the sling

14. WAVE is describes as periodic disturbance that moves away from a
source that travels through a medium.
ENERGY being transferred by the wave from one point to another
TRANSVERSE WAVE is produced by the rope when individual segments of
the rope vibrate perpendicularly to the direction in which the waves
travel
LONGITUDINAL WAVE is produced when each portion of a coil spring is
alternatively compressed and extended
MEDIUM is the materials where wave travels through?

15. A.Energy E. Particle
B.Longitudinal Wave F. Source of Disturbance
C.Medium G. Transverse Wave
D.Motion H. Wave
Read each question carefully; Choose the correct answer from the given choices below
1. Which is describes as periodic disturbance that moves away from a
source that travels through a medium?
2. What is being transferred by the wave from one point to another?
3. Which type of wave is produced by the rope when individual segments of
the rope vibrate perpendicularly to the direction in which the waves travel?
4. Which type of wave is produced when each portion of a coil spring is
alternatively compressed and extended?
5. What do you call the materials where wave travels through?

29. Draw waves to represent each electromagnetic wave. Your illustrations must
represent the wavelength of a wave relative to the others. For instance, gamma rays
have a very small wavelength compared to the other waves in the spectrum.

32. Choose the letter of the correct answer.
1. What type of wave is an ocean wave?
A. electromagnetic wave C. standing wave
B. mechanical wave D. water wave
2. What happens to the frequency of the electromagnetic wave if its wavelength increases?
A. decreases
B. increases as well
C. remains the same
D. can not tell; frequency and wavelength are two different concepts.
3. What happens to the frequency of the electromagnetic wave if its wavelength decreases?
A. decreases
B. increases
C. remains the same
D. can not tell; frequency and wavelength are two different concepts.
4. Which of the following about mechanical waves and electromagnetic waves is correct?
A. Both mechanical wave and electromagnetic waves requires medium in order to travel.
B. Mechanical wave requires medium in order to travel while electromagnetic waves does not requires medium in order to
travel.
C. Mechanical wave does not require medium in order to travel while electromagnetic waves requires medium in order to travel.
D. Both mechanical wave and electromagnetic waves does requires medium in order to travel.
5. Which of the following cannot produce electromagnetic wave?
A. light bulb B. radio transmitter
C. rope D. microwave oven

33. parts of a waves
Science 7