AQA GCSE COMBINED SCIENCE
Updated
Questions with Complete Answers,
Quiz_________________?
3 things that could happen when a wave meets a boundary between two materials : -
Answer✅
- The wave is *transmitted* through the material - carries on travelling
- The wave is *absorbed* by the material
- The wave is *reflected* - 'sent back' - this is how echoes are produced
Quiz_________________?
3 ways to increase the magnetic field produced by a solenoid -
Answer✅
- Increase the current
- Increase the number of coils in the wire
- Place a piece of Iron inside the solenoid (iron core)
Quiz_________________?
A force is -
Answer✅
1
, a push or pull on an object that is caused by it interacting with something
Quiz_________________?
A solenoid with an iron core is called an ? -
Answer✅
electromagnet
Quiz_________________?
Acceleration -
Answer✅
change in velocity in a certain amount of time
Quiz_________________?
amplitude -
Answer✅
The amplitude of a wave is the greatest distance a point on the wave moves from its
undisturbed postion
Quiz_________________?
At one time in the investigation, the cyclist was distracted.
The distraction increased the stopping distance of the bike but did not affect the braking
distance
Explain why the stopping distance increased -
Answer✅
The cyclist's reaction time increased (1)
The thinking distance increased (1)
Stopping distance is thinking distance plus braking distance (1)
2
, Quiz_________________?
Compression -
Answer✅
regions where the air particles are very close together
Quiz_________________?
Dangers of EM waves -
Answer✅
Low frequency e.g radio waves = not harmful - pass through soft tissue without being
absorbed
High frequency e.g gamma rays transfer lots of energy = lots of damage
X- rays + Gamma rays = ionising radiation = gene mutation/cell destruction, and cancer
- Radiation Dose = measured in *Sieverts* = measure risk of harm from body being exposed
to radiation
Quiz_________________?
DC Commnicators -
Answer✅
Forces act on the two side arms of a coil of wire that's carrying a current - the usual forces
which act on any current in a magnetic field
Since one coil is on a spindle, it rotates as the forces act one up & one down
The split-ring commutator swaps the contacts every half turn to keep the motor rotating in
the same direction
The direction of the motor can be reversed by swapping the polarity of the dc supply
(reversing the current) or swapping the magnetic poles over (reversing the field)
Quiz_________________?
Describe how Newtons third law applies to the forces between the bike and the trailer -
Answer✅
3
, The forces of the bike on the trailer and the trailer on the bike are equal in size and opposite
in direction
Quiz_________________?
Describe how radio waves can be produced -
Answer✅
Produced by alternating currents/oscillations of charged particles in electrical circuits
Quiz_________________?
Distance-Time Graphs - Features -
Answer✅
1) Gradient = speed
2) Flat sections = object is stationary
3) Straight uphill sections = object is travelling at a steady speed
4) Curves = object is accelerating or decelerating
5) Steepening curve = object is speeding up
6) Levelling off curve = object is slowing down
Quiz_________________?
Electromagnets are extremely useful as ? -
Answer✅
you can change the strength of the magnetic field by changing the size of current and you
can turn the electromagnet on or off
Quiz_________________?
EM continuous spectrum -
Answer✅
1) Radio waves
4
Updated
Questions with Complete Answers,
Quiz_________________?
3 things that could happen when a wave meets a boundary between two materials : -
Answer✅
- The wave is *transmitted* through the material - carries on travelling
- The wave is *absorbed* by the material
- The wave is *reflected* - 'sent back' - this is how echoes are produced
Quiz_________________?
3 ways to increase the magnetic field produced by a solenoid -
Answer✅
- Increase the current
- Increase the number of coils in the wire
- Place a piece of Iron inside the solenoid (iron core)
Quiz_________________?
A force is -
Answer✅
1
, a push or pull on an object that is caused by it interacting with something
Quiz_________________?
A solenoid with an iron core is called an ? -
Answer✅
electromagnet
Quiz_________________?
Acceleration -
Answer✅
change in velocity in a certain amount of time
Quiz_________________?
amplitude -
Answer✅
The amplitude of a wave is the greatest distance a point on the wave moves from its
undisturbed postion
Quiz_________________?
At one time in the investigation, the cyclist was distracted.
The distraction increased the stopping distance of the bike but did not affect the braking
distance
Explain why the stopping distance increased -
Answer✅
The cyclist's reaction time increased (1)
The thinking distance increased (1)
Stopping distance is thinking distance plus braking distance (1)
2
, Quiz_________________?
Compression -
Answer✅
regions where the air particles are very close together
Quiz_________________?
Dangers of EM waves -
Answer✅
Low frequency e.g radio waves = not harmful - pass through soft tissue without being
absorbed
High frequency e.g gamma rays transfer lots of energy = lots of damage
X- rays + Gamma rays = ionising radiation = gene mutation/cell destruction, and cancer
- Radiation Dose = measured in *Sieverts* = measure risk of harm from body being exposed
to radiation
Quiz_________________?
DC Commnicators -
Answer✅
Forces act on the two side arms of a coil of wire that's carrying a current - the usual forces
which act on any current in a magnetic field
Since one coil is on a spindle, it rotates as the forces act one up & one down
The split-ring commutator swaps the contacts every half turn to keep the motor rotating in
the same direction
The direction of the motor can be reversed by swapping the polarity of the dc supply
(reversing the current) or swapping the magnetic poles over (reversing the field)
Quiz_________________?
Describe how Newtons third law applies to the forces between the bike and the trailer -
Answer✅
3
, The forces of the bike on the trailer and the trailer on the bike are equal in size and opposite
in direction
Quiz_________________?
Describe how radio waves can be produced -
Answer✅
Produced by alternating currents/oscillations of charged particles in electrical circuits
Quiz_________________?
Distance-Time Graphs - Features -
Answer✅
1) Gradient = speed
2) Flat sections = object is stationary
3) Straight uphill sections = object is travelling at a steady speed
4) Curves = object is accelerating or decelerating
5) Steepening curve = object is speeding up
6) Levelling off curve = object is slowing down
Quiz_________________?
Electromagnets are extremely useful as ? -
Answer✅
you can change the strength of the magnetic field by changing the size of current and you
can turn the electromagnet on or off
Quiz_________________?
EM continuous spectrum -
Answer✅
1) Radio waves
4
