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year 8 Science Homework Week 4
By Naomi Arthur
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Last updated over 4 years ago
15 questions
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Question 1
1.
The change of speed and direction of light as it passes through a medium is called….
Dispersion
Reflection
Refraction
Speculation
Question 2
2.
When light passes through a more dense medium, what happens to the speed?
It speeds up
It slows down
It stays at a constant speed
Question 3
3.
When light passes through a less dense medium, what happens to the direction?
It bends away from the normal
It bends towards the normal
It continues in the same direction
Question 4
4.
Which colour light does a green object
absorb
green
blue
all of them
all of them expect green
Question 5
5.
Which colour light does a red object
reflect
red
green
blue
all of them
Question 6
6.
Which colour light does a blue object
reflect
red
green
blue
all of them
Question 7
7.
Which colour light does a blue object
absorb
:
red
blue
green
all of them except blue
Question 8
8.
Which of the following is the correct definition of hydraulics?
Systems where liquids are used to multiply and transfer forces
Systems where solids are used to multiply and transfer forces
Systems where liquids are used to multiply and transfer pressure
Question 9
9.
The equation that links force, pressure and are is…
force = pressure/area
area = pressure/force
pressure = force/area
Question 10
10.
What happens to pressure with increasing depth of a liquid?
Decreases
Increases
Stays the same
Question 11
11.
Light can.............. when it enters a new medium
Change direction
Denser
Normal
stay the same
Question 12
12.
The change in direction of light when it enters a new medium is called..........
bending
refraction
normal
bends towards the normal
Question 13
13.
Light travels............... in substances that are denser
faster
slower
changes direction
stops
Question 14
14.
light................. when it enters and leaves glass
changes direction
bends
less dense
refracts
Question 15
15.
as light enters the glass it slows down because the glass is ....... than air
more dense
less dense
refracts