Font size
WorksheetsYear End Revision Part 2/2
Total questions: 25
Worksheet time: 16mins
All forms of light that we can see with our eyes is termed: .............. ...........
(a)
The image alongside shows..
A. light travelling in straight lines
B. an inverted image
C. a demonstration of the movement of light
All of the options A, B & C
Blue has a longer wavelength than red
Red has a longer wavelength than blue
Blue has a shorter wavelength than indigo.
Select the INCORRECT statement / description
the speed of light is 300 000 km
One light year is 10 trillion km
One light year is 10 000 000 000 000 km
A light year is the distance light travels in one year
An asteroid is 3000 million km away from Mars.
This distance can be written as ..
3 billion
(3 000 000 000 )
30 billion
(30 000 000 000)
3 trillion
(3 000 000 000 000)
An effect of electric current can be breaking down substances. The diagram alongside shows..
Thermal decomposition
Electrolysis
Chemical decomposition
The weaker magnetic field will be in ...
electromagnet A
electromagnet B
Name the type of reflection that can be observed in the picture
(a)
.
When all light is absorbed by an object, it will appear ..
Black
White
Translucent
Transparent
Provide the correct term for the following definition: When a light ray approaches a smooth polished surface and the light ray bounces back. (a)
Calculate the angle of incidence
90 degrees
30 degrees
60 degrees
Name the phenomenon represented by the straw
(a)
The glass allows light to bend because ..
it is more dense than air
less dense than air
the same density as air
Match examples of the different telescopes types.
A. Hubble
B. SALT
C. SKA
A -Space telescope
B - Radio telescope
C-Optical.telescope
A -Space telescope
B-Optical.telescope
C- Radio telescope
A - X ray telescope
B-Optical.telescope
C- Radio telescope
Like lenses in our eye, lenses in telescopes also help to focus light
True
False
Which of the following conditions would limit the use of a radio telescope ?
A
B
C
D
The lens at Y is ..
An eyepiece lens
an objective lens
a light collecting lens
An ellipse refers to a/an __________ shape
oval
irregular
barred spiral
spiral
The third largest member of our local group is ..
Andromeda Galaxy
Triangulum Galaxy
Milky Way Galaxy
A collection of stars held together by their mutual gravity is a
Galaxy
Constellation
Calculate the distance of a light minute. Include 'km' at the end of your value
(a)
Jupiter is approximately 43 light minutes from the sun. How many km is this ?
418 604 km
774 000 000 km
(774 million km)
774 000 000 km/s
(774 million km/s)
Calculate the distance of the moon from earth in light seconds.
0.78 light seconds
1.28 light seconds
1.15 light seconds
Use the ray diagram alongside to determine the colour of the object being looked at. Write down the colour only.
(a)
The glass bricks alongside are ..
opaque
transparent
translucent
