Year 7 Semester 2 Revision
PHYSICS:
1. Define Force and what unit is it measured in
__________________________________________________________________________________
__________________________________________________________________________________
2. Define and give examples of:
Balanced force:______________________________________________________________
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___________________________________________________________________________
Unbalanced force:____________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
3. Calculate net force for the following, indicating which direction the object will move
4. Explain what friction is using a real world
example:______________________________________________________________
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_____________________________________________________________________
_____________________________________________________________________
5. How could you reduce the amount of friction between two surfaces?
_____________________________________________________________________
_____________________________________________________________________
_____________________________________________________________________
6. Simple machines makes doing work easier by reducing the amount of force needed.
Give an example where using a simple machine would be beneficial.
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_____________________________________________________________________
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7. Use the word bank below to name the simple machine in each picture
EARTH AND SPACE:
8. In the table below explain what a natural and synthetic resource is and give at least 1
example
Natural Resources
Explanation
Synthetic Resources
Explanation
Examples
Examples
9. Identify what kind of eclipse is occurring below:
a. Name:____________________________________
b. What we see: _______________________________
c. Name:__________________________________
d. What we see:____________________________
10. When is the Earth tilted towards the sun what season do we experience?
___________________________________________________________
11. Fill in the gaps using the missing words:
Earth
seasons
high
equator
degree
two
tilt
Tides
winter
towards
hours
hotter
rays
gravitational
a. The ___________ interaction between the ________ and Moon causes__________.
In 24 ________we experience 2 _______tides and _____ low tides.
b. The Earth is on a 23.5_________tilt. This ____ is the reason why we experience
________, when the Earth is tilted _________ the Sun we experience Summer and
when the Earth is tilted away, we experience _________.
c. The ___________ is an imaginary line running horizontally through the center of the
Earth. It is _________ at the equator because it is always facing the suns _________.
12. Complete the table below explaining what renewable energy and nonrenewable
energy is then list three examples for each.
Renewable
NonRenewable
Examples
Examples
13. Label the different moon phases below using the words in the box. Some words
you may need to use more than once.
Year 7 Semester 2 Revision
PHYSICS:
14. Define Force and what unit is it measured in
force is a push or pull that is measured in newtons
15. Define and give examples of:
Balanced force:
balanced force is when two forces are the same, e.g. a ball sitting on a
desk or a car moving at constant speed
Unbalanced force:
Unbalanced force is when two forces are acting with different amounts
e.g. one person pulls on a string harder than another person, a ball
slowing down
16. Calculate net force for the following, indicating which direction the object will move
6 + 3 = 9N Right
5 – 4 = 1N Left
2 + 4 – 5 = 1N Right
17. Explain what friction is using a real world example:
Friction is the force that opposes motion, it works in the opposite direction to
the movement of an object. When a car drives along the road, the road and
air supply friction which can stop the car from moving
18. How could you reduce the amount of friction between two surfaces?
To reduce friction you can add oil, water or a layer or air between the
surfaces, use balls or rollers
19. Simple machines makes doing work easier by reducing the amount of force needed.
Give an example where using a simple machine would be beneficial.
Lifting a fridge onto a truck, moving a heavy object, chopping wood
etc.
20. Use the word bank below to name the simple machine in each picture
Pulley
Wheel and axel
lever
inclined plane
screw
wedge
EARTH AND SPACE:
21. In the table below explain what a natural and synthetic resource is and give at least 1
example
Natural Resources
Explanation
Natural resources are found in nature
Synthetic Resources
Explanation
Synthetic resources are man made
Examples
Wind, water, biomass, sun
Examples
Plastic
22. Identify what kind of eclipse is occurring below:
e. Name: lunar eclipse
f. What we see: no moon or a dark reddish moon
g. Name: solar eclipse
h. What we see: no sun, ring of light around the moon
23. When is the Earth tilted towards the sun what season do we experience?
summer
24. Fill in the gaps using the missing words:
Earth
seasons
high
equator
degree
two
tilt
Tides
winter
towards
hours
hotter
rays
gravitational
d. The gravitational interaction between the Earth and Moon causes tides. In 24
hours we experience 2 high tides and two low tides.
e. The Earth is on a 23.5 degree tilt. This tilt is the reason why we experience
seasons, when the Earth is tilted towards the Sun we experience Summer and
when the Earth is tilted away, we experience winter.
f. The equator is an imaginary line running horizontally through the center of the
Earth. It is hotter at the equator because it is always facing the suns rays.
25. Complete the table below explaining what renewable energy and nonrenewable
energy is then list three examples for each.
Renewable
Renewable energy sources are sources
that have unlimited amount of supply and
are derived from natural resources
Examples
Wind, water, solar, geothermal
NonRenewable
Non-renewable resources are resources
that only have limited supply and will
eventually run out
Examples
Oil, coal, nuclear
26. Label the different moon phases below using the words in the box. Some words
you may need to use more than once.
Half moon
crescent moon
gibbous moon
full moon
New moon
crescent moon
gibbous moon
Half moon
*Take note
1. Disadvantages of wind power
a. Needs to be located somewhere with constant wind
b. Can be noisy
c. Threat to wildlife
2. Gases in the atmosphere that can absorb heat are called greenhouse gases
3. The relationship between seasons in the southern hemisphere and the northern
hemisphere is that they will be opposite. When the south experiences summer the
north will experience winter
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