Communication Year 9 Science

20 Questions | By Laura_rose | Last updated: Mar 21, 2022 | Total Attempts: 430

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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?