Periodic Phenomena - Grade 9 Science
Explore the fundamental concepts of periodic phenomena, including oscillations, waves, and their properties.
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Periodic Phenomena
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Read each question carefully and answer to the best of your ability. Show all your work for calculation problems.
1. Which of the following best describes a periodic phenomenon?
An event that happens randomly.
An event that repeats at regular intervals.
An event that occurs only once.
An event that always changes its pattern.
2. The time it takes for one complete oscillation of a pendulum is called its:
Frequency
Amplitude
Period
Wavelength
3. The maximum displacement or distance moved by a point on a vibrating body or wave measured from its equilibrium position is called the .
4. The number of cycles or vibrations per unit of time is known as .
5. A pendulum completes 20 oscillations in 10 seconds. Calculate its period and frequency.
6. The period of a simple pendulum depends on the mass of its bob.
True
False
7. A wave transports energy but not matter.
True
False
8. Observe the pendulum below. Label its equilibrium position and amplitude.
Match each term on the left with its definition on the right.
9. Wavelength
a. The number of cycles per second.
10. Crest
b. The highest point of a wave.
11. Trough
c. The distance between two consecutive crests or troughs.
12. Frequency
d. The lowest point of a wave.