WorksheetsLight and Sound
Total questions: 27
Worksheet time: 19mins
We perceive light with our
eyes
ears
nose
skin
The lack (ausencia) of light is called...
darknes
darkness
sources
Light travels at...
3.000 kilometres per second
300.000 kilometres per minute
300.000 kilometres per second
300.000 metres per second
There are two different type of light sources:
natural and man-made
natural and artifitial
man-made and nature-made
Some examples of man-made light sources are...
fire
bulbs
sun
torches
Some examples of natural light sources are...
fire
bulbs
sun
torches
Objects can be classified in...
translucent and opaque objects
transparent, translucent and opaque objects
opaque, translucent and invisible
In opaque objects...
The light can perfectly pass through so we can see the other side clearly.
The light can't pass through so we can't see anything of the other side.
Only a part of light pass through so we can't see the other side clearly.
In translucent objects...
The light can perfectly pass through so we can see the other side clearly.
The light can't pass through so we can't see anything of the other side.
Only a part of light pass through so we can't see the other side clearly.
In transparent objects...
The light can perfectly pass through so we can see the other side clearly.
The light can't pass through so we can't see anything of the other side.
Only a part of light pass through so we can't see the other side clearly.
The light rays travel in all directions, following an straight line
TRUE
FALSE
Light reflection occurs when ...
a ray of light hits a translucent object, bounces back and changes its direction.
a ray of light hits a transparent object, bounces back and changes its direction.
a ray of light hits an opaque object, bounces back and changes its direction.
Light refraction occurs when the rays change their direction because there is a change of...
material
medium
state
When there is refraction, the image seems to be...
bigger
smaller
the same
This experiment is an example of
Refraction
Reflection
The sound arrives to our ear because there are vibrations
True
False
These vibrations are called...
sound wawes
sound waves
sound vibrations
The sound travels in the air at...
340 kilometres per minute
34 metres per second
340 kilometres per second
340 metres per second
The four characteristics of sound are...
intensity, echo, timbre and pitch
intensity, direction, pitch and timbre
intensity, duration, pitch and timbre
duration, pitch, timbre and echo
The volume of the sound is called...
duration
intensity
timbre
pitch
How short or long a sound is, is called...
duration
intensity
timbre
pitch
How high or low a sound is, is called...
duration
intensity
timbre
pitch
The timbre of a sound allows us to differenciate sounds....
with the same duration and intensity but different pitch
with the same duration, pitch and intensity
with the same intensity but different pitch and duration
This is an example of ...
Echo
Reverberation
Echo occurs....
when there is more than 17 metres between the source and the object
when there is less than 17 metres between the source and the object
in open spaces
in close spaces
Light is formed by....
only white colour
5 colours
7 colours
We can see the red t-shirt and blue jeans because...
red and blue colours are absorved and the rest are reflected
red and blue colours are reflected and the rest are absorbed
there only exist red and blue colours
The sun only send red and blue light rays
