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WorksheetsGrade 7-Exam Revision Energy and Physics
Total questions: 42
Worksheet time: 22mins
What unit is used to measure moments?
Newtons per meter
Newton meters
Kilograms
Meters per second
How is relative motion defined?
The speed of one object relative to another.
The distance one object moves.
The time taken for an object to stop.
The force applied by an object.
In a distance-time graph, what does a horizontal line represent?
Constant speed
Increasing speed
Decreasing speed
No movement
What is the formula to calculate speed?
distance × time
distance ÷ time
time - distance
distance + time
Why do objects float in water?
Because of the air pressure
Due to gravitational pull
Because of upthrust from liquid pressure
Due to the shape of the object
What happens to gas pressure if the gas is compressed?
It decreases
It remains the same
It increases
It fluctuates
According to the law of moments, when is an object in equilibrium?
When clockwise moments equal anticlockwise moments
When total moments are zero
When force is applied equally
When there is no movement
How does atmospheric pressure change with altitude?
It increases with altitude
It decreases with altitude
It remains constant
It fluctuates randomly
How is pressure in solids measured?
In joules per second
In newtons per meter squared
In meters per second squared
In kilograms per cubic meter
What is the effect of heating a gas on its pressure?
Pressure decreases
Pressure remains the same
Pressure increases
Pressure disappears
What happens to particles when a solid is heated?
They move closer together.
They gain kinetic energy and vibrate more.
They lose energy and vibrate less.
They remain static.
Which process transfers thermal energy in solids?
Radiation
Convection
Conduction
Evaporation
What is the unit of power?
Joules (J)
Kilowatt-hour (kWh)
Newton (N)
Watt (W)
What does a thermometer measure?
Thermal energy
Kinetic energy
Temperature in degrees Celsius
Potential energy
What type of resource is coal considered?
Renewable
Non-renewable
Infinite
Sustainable
What does the law of conservation of energy state?
Energy can be created or destroyed.
Energy can be transferred but not created or destroyed.
Energy can only be stored.
Energy is only destroyed.
What is equilibrium in terms of thermal energy?
When objects have the same mass.
When objects have the same temperature.
When objects have the same thermal energy.
When objects have no energy.
What causes a convection current in liquids or gases?
The density of the particles increasing.
The part in contact with the heat source getting hotter and less dense.
The cooler parts rising.
The particles stopping their movement.
Which of the following is a renewable energy resource?
Coal
Oil
Solar power
Natural gas
How is energy transferred between different stores?
Only through heating
Through light, sound, and electricity
By breaking bonds
Through magnetic fields
What is static electricity caused by?
Movement of protons
Movement of neutrons
Movement of electrons
Movement of atoms
What instrument is used to measure electric current?
Voltmeter
Ammeter
Ohmmeter
Wattmeter
Which of the following materials is not attracted to a magnet?
Iron
Nickel
Copper
Cobalt
The direction of conventional current is:
From positive to negative
From negative to positive
From north to south
From south to north
What is the unit of measurement for electrical resistance?
Ampere
Volt
Ohm
Watt
Which of the following is a good conductor?
Wood
Plastic
Copper
Glass
Potential difference is also known as:
Current
Resistance
Voltage
Power
Where are electromagnets not used?
Electric motors
Loudspeakers
Magnetic Resonance Imaging (MRI)
Wooden toys
The region around a magnet where it can attract or repel other magnets is known as:
Magnetic force
Magnetic field
Magnetic flux
Magnetic induction
Which material is likely to become positively charged when rubbed?
Glass
Rubber
Copper
Iron
Increasing the number of coils in an electromagnet will:
Increase its magnetic field
Decrease its magnetic field
Have no effect on its magnetic field
Reverse its magnetic field
In a series circuit, if one component fails, what happens to the other components?
They continue to work
They also fail
Their performance improves
Their performance decreases
What is an electromagnet?
A magnet that is always on
A magnet that can be turned on and off
A magnet that is naturally occurring
A magnet that repels all metals
What is the total resistance of this circuit?
25 Ω
75 Ω
100 Ω
18.75 Ω
_______circuits use branches to allow current to pass through more than one path.
Parallel
Series
Open
Closed
In a ______ circuit, all components are connected using a single pathway
series
parallel
open
closed
The area of electric force around an electrically charged particle is called an...
Electric Force
Electric Field
Electricity
Attract and Repel
Which lamps will light up? Select all the lamps that will light up.
Which answer describes the pictures correctly?
Both drawings show attraction of magnetic forces.
The left drawing shows repulsion and the right drawing shows attraction of magnetic forces.
Both drawings show repulsion of magnetic forces.
The left drawing shows attraction and the right drawing shows repulsion of magnetic forces.
What conclusion can you draw from this graph?
As current increases, magnetic strength decreases.
As current increases, magnetic strength increases.
As current decreases, magnetic strength increases.
There is no relationship between current and magnetic strength.
When running a current through a wire, what do the blue lines represent?
The wire spinning
A magnetic field that was created
Electrons leaving
Electricity
