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WorksheetsM2_Science_Revision [Density, Buoyancy,Force,Speed,Velocity]
Total questions: 40
Worksheet time: 20mins
What is the formula for density?
D = m + v
D = m - v
D = m/v
D = v/m
Which of the following describes buoyancy?
the ability of an object to float
the force that causes an object to sink
the density of an object
the mass of an object
If an object has a mass of 20 kg and a volume of 4 m³, what is its density?
5 kg/m³
8 kg/m³
15 kg/m³
20 kg/m³
An object will float in water if:
its density is greater than water
its mass is equal to its volume
its density is less than water
its volume is greater than its mass
Which is easier to lift and why?
A, because buoyant force lifts it upward
B, because the buoyant force pulls it downward
B, because gravity pushes it downward
A, because gravity pushes it upward
Why does the ball float on water?
Because the buoyant force is greater than the weight
Because the weight is greater than the buoyant force
Because the weight and buoyant force are equal
The ball likes to float
Which condition causes an object to float?
lower mass and higher buoyant force
lower buoyant force and higher mass
higher mass and higher buoyant force
None of the above
A material with a density of 7.8 g/cm³ is placed in water. What will happen? [Density of water = 1.00 g/cm3]
it will float
it will sink
it will dissolve
it will boil
Density of an object is affected by ___ and __
mass/volume
mass/gravity
mass/height
volume/height
What is the unit of density?
g/m³
kg/m²
kg/m³
kg/m
Friction is a _____ that opposes _____?
force/movement
force/gravity
force/buoyancy
movement/force
What type of friction acts on a book on the table?
fluid
kinetic
sliding
static
Which type of friction occurs when a solid object moves through a fluid?
static
kinetic
sliding
fluid
Static means
no movement
slow movement
fast movement
flying
Friction acts in the _______ direction with the push or pull
same
opposite
both a and b are correct
None of the above
This is an example of ________ friction?
sliding
static
fluid
buoyant force
How does friction affect the motion of an object?
it speeds up motion
it opposes motion
it has no effect on motion
it changes direction of motion
Which of the following is not a type of friction?
fluid
static
sliding
potential
One of the following is kinetic friction
a book on a table
a car parked on a hill
a ball sliding down a hill
a man lifting a heavy object
The principle of friction states ________
the smoother the surface, the more friction
friction only occurs in liquids
friction opposes motion between surfaces in contact
friction does not occur in solids
What is an electric field?
a region where a magnetic force is felt
a region where an electric force is felt
a region where a gravitational force is felt
a region with no force
Picture A shows a _______
positive field line
negative field line
neutral field line
gravitational field line
Picture B shows a _______
negative field line
positive field line
Static force
friction force
Which picture shows that 'positive charge repels'?
A
B
Both
None
Which of the following describes the electric field around a negative charge?
B
A
Both
None
What is the unit of the electric field?
Newton
Joule
Coulomb
Newton per Coulomb
When two positive terminals are connected, ___________
no charge is produced
low charge is produced
charge is produced
options a-c are correct
Connecting a positive and a negative terminal produces _________
an electric charge
a friction force
no force, no charge
no electric charge
What causes an electric field?
electric charges
moving magnets
neutral particles
sound waves
Which diagram will produce an electric charge?
A
B
Both
None
What is a magnetic field?
a region where a gravitational force is felt
a region where an electric force is felt
a region where a magnetic force is felt
a region with no force
Which of the following describes magnetic field lines?
they start from the south pole
they start from the north pole
they form closed loops
they do not exist
What happens to the magnetic field as the distance from a magnet increases?
it increases
it decreases
it remains constant
it disappears
Which of the following materials is strongly attracted to a magnet?
copper
wood
iron
plastic
The picture shows ______
the direction of a magnetic field
the direction of an electric field
the direction of an electromagnetic field
the movement of the earth
Which statement is not true
Earth North pole = magnetic South pole
Earth South pole = magnetic North pole
F magnetic = qvB
Magnetic charge moves from south to north
What is the unit of the magnetic field?
Newton
Coulomb
Tesla
Joule
Magnetism in iron is called ________
paramagnetism
diamagnetism
ferromagnetism
antiferromagnetism
This picture is an example of ________
magnetism around a conductor
field lines parallel to a conductor
random lines around a conductor
water ripples
Which principle does the magnetic field around a current-carrying wire follow?
The right-hand rule
The left-hand rule
Newton's law
Friction law
