WorksheetsRevision
Total questions: 109
Worksheet time: 1hrs 11mins
Which of the following are in the correct order of size from largest to smallest?
galaxy, universe, planet, star
star, planet, comet, galaxy, moon
galaxy, universe, star, planet, moon
universe, galaxy, star, planet, comet
What object is at the centre of our Solar System?
a black hole
a large star
the Earth
a quasar
Stars are classified based on two properties of the star. Which of the following properties are the basis of classification?
brightness and colour
colour and surface temperature
brightness and surface temperature
size and colour
Where do stars form?
They do not form – they have been here since the beginning of the Universe.
They form in a supernova.
They form in stellar nebulae.
They form from dead planets
What causes the nuclear fusion to begin in a star?
lots of dust particles ignite
helium molecules being produced
intense heat and pressure
gravity
When a star is in the main sequence, what can be said about the forces acting inside the star?
The outward pressure is greater than the gravitational pull.
The gravitational pull is greater than the pressure from the fusion reactions.
All the forces acting on the star are unbalanced.
The inward gravitational attraction is equal to the outward pressure from the fusion reactions.
How might it be noticeable that a star is now fusing helium rather than hydrogen atoms?
The star cools and becomes a white dwarf.
The star shrinks then expands to form a red giant.
A black hole is created.
The star stops glowing.
Which of the following describes how a star much greater in mass than the Sun might end its life?
It will cool and collapse, forming a white dwarf.
It will cool and become a neutron star.
It will cool and become a supergiant which will then explode into a supernova, leaving a black hole.
It will remain stable for too long for us to know what might happen.
The brightness of a star depends on two factors. Which of the following shows the two factors?
the luminosity of the star and its distance from the Earth
the size of the star and its colour
the luminosity of the star and its size
the colour of the star and its surface temperature
Which of the following correctly identifies the absolute brightness of a star?
the brightness of the star as seen from the Earth
the amount of light emitted per second by the star
the brightness of the star compared to other stars if all stars were the same distance from the Earth
the colour of the star
Mira is a star found in the giants section of the Hertzsprung–Russell diagram. What is the next step for Mira in its lifecycle?
neutron star
supernova
cools to become a white dwarf
condenses to become a black hole
The Hertzsprung–Russell diagram links which three properties of stars?
luminosity, temperature and colour
luminosity, temperature and classification
colour, age and classification
colour, mass and brightness
Which of the following is the evidence of the expansion of universe?
Blue shift
Red shift
Cosmic microwave background radiation (CMBR)
Supernova
Which of the following equations represents Hubble's law?
v = Hd
v = H/d
d = vH
H = d/v
What is the approximate position of giants in the shown HR diagram?
D
C
A
B
The nuclear reaction that takes place in the core of the stars is
Nuclear disposition
Nuclear fission
Nuclear fusion
Nuclear composition
Our sun in the milky way galaxy belongs to the main sequence stars of HR Diagram
True
False
A large ensemble of stars, all interacting through the gravitational force and orbiting around a common center is called
Constellation
Galaxy
Star cluster
Star show
The brightness of a star as seen in the night sky.
Apparent magnitude
Brightness magnitude
Brightness scale
Star magnitude
which planet is the biggest in the solar system?
uranus
neptun
venus
jupiter
An ant walks a distance of 90cm in a time of 1 minute at a steady speed. What is its speed?
0.011cm/ s
0.67cm/ s
1.5cm/ s
90cm/ s
A shopkeeper places two identical blocks of cheese on a balance. The combined mass of the two blocks of cheese is 240g. Each block measures 2.0cm × 5.0 cm × 10.0cm.
What is the density of the cheese?
0.42g/ cm3
0.83g/ cm3
1.2g/ cm3
2.4g/ cm3
A car is driven on a long journey along a horizontal road. The car stops several times on the journey and its engine becomes hot. Which type of energy remains constant during the journey?
the chemical energy in the fuel tank
the gravitational energy of the car
the kinetic energy of the car
the thermal energy of the engine
Which statement about the evaporation of a liquid is not correct?
Evaporation happens only at one particular temperature.
Evaporation happens only at the surface of the liquid.
Evaporation happens when the more energetic molecules escape from the liquid.
The energy required for evaporation can cause the liquid to cool.
Hot, liquid wax is allowed to cool to room temperature. The graph shows how the temperature of the wax changes with time. At which labelled point on the graph are both liquid wax and solid wax present?
A
B
C
D
Which row is correct?
A
B
C
D
A boat floats on the sea. The boat moves slowly up and down as a wave passes it. The amplitude of the wave is 0.20 m. What is the vertical distance between the highest and lowest positions of the boat as the wave passes it?
0 m
0,20 m
0,40 m
0,80 m
A filament lamp is used in a zoo to keep young animals warm. What are the main types of wave given out by the lamp?
visible light and infra-red
visible light and microwaves
visible light and radio waves
visible light and X-rays
A loudspeaker vibrates with different amplitudes and at different frequencies. Which amplitude and which frequency produces the louder, higher-pitched sound?
large amplitude and high frequency
large amplitude and low frequency
small amplitude and high frequency
small amplitude and high frequency
The current in a lamp is 0.25A. The maximum safe current in the cable to the lamp is 5.0A. Which fuse should be used to protect the lamp circuit?
0.2A
1.0 A
5.0 A
10.0 A
A student connects a battery to a lamp. She wishes to measure the current in the lamp and the potential difference across the lamp. Which circuit is used to do this?
A
B
C
D
In the circuit shown, the switch is open. What happens to the lamp when the switch is closed?
It becomes brighter.
It becomes dimmer.
It becomes dimmer at first, then brighter.
Its brightness does not change.
A
B
C
D
What is the purpose of a fuse in an electric circuit?
to disconnect the circuit if the current becomes too large
to increase the voltage if the current becomes too small
to prevent someone cutting the insulation of the wiring
to stop water getting into the circuit
A tank is full of water. The water at the bottom of the tank is heated. Eventually all the water in the tank becomes hot. What is the main method of energy transfer in the water?
conduction
convection
evaporation
radiation
Two balloons X and Y are suspended by insulating threads. They are each held near a negatively charged balloon. The balloons hang as shown.
A
B
C
D
A
B
C
D
Which statement about sound is not correct?
A sound wave of frequency 2000 Hz can be heard by a healthy human ear.
Sound waves can travel through a vacuum.
The loudness of a sound depends on the amplitude of the sound wave
The pitch of a sound depends on the frequency of the sound wave.
The reading on ammeter 1 is greater than the reading on ammeter 3.
The reading on ammeter 1 is greater than the reading on ammeter 3.
The reading on ammeter 3 is greater than the reading on ammeter 2.
The reading on ammeter 2 is greater than the reading on ammeter 4
In which situation is potential energy increasing?
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
The places where a magnetic forces of a magnet are strongest are called ...
Two like poles always .....
A magnetic material that becomes a magnet when placed in a magnetic field is known as ...
an inducted magnet.
an induced magnet.
a temporary magnet.
an electromagnet.
Which of these metals is not magnetic?
Copper
Steel
The Earth's magnetic field is thought to be due to ...
Magnetic materials in the Earth's crust.
Molten iron and nickel in the Earth's outer core.
Solid iron and copper in the Earth's inner core.
A giant bar magnet in the inner core.
What is the pole under the green box?
north pole
south pole
Which statement about magnetic field patterns is INCORRECT?
Magnetic field lines touch at the poles.
The further apart field lines are the weaker the field's strength.
Field lines always point into a south pole from a north.
The greater the distance from a magnet the weaker the field's strength.
What pole is hidden beneath the green box?
north pole
south pole
How do iron filings indicate where the strongest part of a magnetic field is?
They don't.
They are more concentrated.
They are less concentrated.
An insulated coil of wire with a current passing through it is known as ...
an induced magnet.
an electromagnet.
a solenoid.
a transformer.
What is the direction of the magnetic field lines produced by the current in this diagram?
up
down
clockwise
anti-clockwise
What is the direction of the magnetic field lines produced by the current in this diagram?
up
down
clockwise
anti-clockwise
Which reason for using an iron core in an electromagnet instead of steel is INCORRECT?
Iron is more easily magnetized.
Iron is less easily demagnetized.
Steel is less easily demagnetized.
Iron creates a stronger magnetic field.
Which of the following changes would NOT increase the strength of an electromagnet.
Increasing the current.
Increasing the number of turns of the coil.
Increasing the thickness of the wire.
Increasing the diameter of the coil.
A type of magnet that has temporary magnetic effect when electric current flows through it.
This refer to
Electric
Electronic
Electrostatic
Electromagnet
What is an electromagnet?
a permanent magnet with a north and south pole
a temporary magnet made from current carrying wire around a magnetic metal core
This is a picture of a simple electromagnet. How can the electromagnet be made stronger?
Remove all the coils and the nail.
Use a smaller battery.
Reverse the poles of the magnet.
Add more coils of wire to the nail.
Which of the following is NOT part of an electromagnet?
Toothpick
battery
Iron nail
wire
How are electromagnets different from magnets?
magnets have a North and South pole
you can turn an electromagnet on/off
magnets are more powerful
Surrounding every magnet is a __________ __________.
another magnet
electrical current
magnetic field
What would increase the strength of an electromagnet?
Changing the direction of the current
Increased the amount of electricity that flows through the wire.
Inserting a wooden core inside the coil
Decreasing the number of coils of wire
You can make an electromagnet stronger by: having a __________________core inside the wire.
smaller core
larger core
greener core
water core
What is a permanent magnet?
Can be turned off
Can not be turned off
Can turned on and off
The components of an electromagnet are?
a power source
wire
iron core
all of these
This picture best illustrates the construction of a(n)
magnet
electromagnet
series circuit
parallel circuit
What is magnetic force?
A force exerted by electrically charged particles
A force exerted by magnets that can be felt by objects near a magnet
A force exerted by magnets that makes an object become electrically charged
A force exerted by a magnet only when it physically touches an object
The picture above is an example of what?
Magnetic field
Electric field
Repulsion
Attraction
What would happen with the magnets in the picture above?
They would repel
Nothing
They would attract
They would repel and then attract
If the north pole of a magnet is brought close to the south pole of another magnet, what will happen?
They will atrract each other
They will repel each other
They will demagnitize
The south pole will turn around so the north pole is facing the other magnet.
What does this image show?
Parallel circuit
Series circuit
Magnet
Electromagnet
The area of magnetic force around a magnet is known as its ____________.
magnetism
magnetic current
magnetic field
electric current
A _______________ is a current-carrying coil of wire with many loops.
magnet
electromagnet
solenoid
compass
Increasing the number of coils in an electromagnet will _________ the power of the magnet.
decrease
increase
not affect
What happens to the strength of a magnetic field as you move away from the magnet?
The strength of the magnetic field increases.
The strength of the magnetic field doesn't change.
The strength of the magnetic field is doubled.
The strength of the magnetic field decreases.
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.
As the strength of a magnetic field increases, the ability to attract metal objects ____________.
increases
decreases
stays the same
