Communication Year 9 Science
20 Questions
| Total Attempts: 376
This test is designed to test all the outcomes for the science topic.
Questions and Answers
- 1.Name the two types of waves
- 2.Electromagnetic waves require matter. true or false
- A.
True
- B.
False
- 3.Longitudinal waves require matter. True or false
- A.
True
- B.
False
- 4.What is Frequency?
- A.
The length of a complete wave
- B.
The number of complete waves / sec
- C.
The speed of the waves
- 5.Complete the velocity formulavelocity=_______ x_________
- 6.The amplitude of a wave is
- A.
Its length
- B.
Its height
- C.
Its speed
- 7.What is frequency of waves measured in?
- 8.When an AM radio signal is sent a long a carrier wave it creates an a______ m_______ wave
- 9.What sort of waves are radio and tv audio signals sent along?
- 10.A digital TV sends its signals in bits. True or False
- A.
True
- B.
False
- 11.BEcause a digital tv sends its signals in bits the sound and picture are worse quality. True or False
- A.
True
- B.
False
- 12.Optic fibers use ________ to carry high frequency light impulses
- A.
Refraction
- B.
Reflection
- 13.On a flat reflective surface the angle of incidence does not equal the angle of reflection. True or false
- A.
True
- B.
False
- 14.Reflected light rays diverge from a convex mirror. True or False
- A.
True
- B.
False
- 15.Reflected rays diverge from a concave mirror true or false?
- A.
True
- B.
False
- 16.What is it called when light bounces off an object?
- 17.What is it called when light bends?
- 18.What is an example of a transverse matter wave?
- A.
Light wave
- B.
Sound wave
- C.
Heat wave
- 19.What is an example of an electromagnetic wave?
- A.
Heat
- B.
Sound
- C.
Water wave
- 20.What is the speed a wave travels in a straight line is called?
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