OCR GCSE (9-1) Physics A – Gateway Science (J249)

Pressure and water depth | Short Circuit

Spec references J249: P1.3c, P1.3d, P1.3f. Effect of water depth on an enclosed volume of air - scuba diver.

Dissolved gases under pressure | Short Circuit

. Spec references: J249: P1.3c, P1.3d, P1.3f Analogy between dissolved gases in the blood and fizzy drinks.

Atmospheric pressure | Short Circuit

. Atmospheric pressure is related to the weight of the air above you.

The effect of pressure on gases | Short Circuit

Spec references J249: P1.3c, P1.3d, P1.3f. The effect of pressure on bubble size - animation.

The decompression chamber | Short Circuit

Spec references J249: P1.3c, P1.3d, P1.3f. How a decompression chamber works - animation and analogy with diving context .

Height and pressure | Short Circuit

Effect of height above the surface of the Earth on pressure - diving patient on a helicopter flight.

What is the bends? | Short Circuit

. How bubbles in the blood cause the bends.

Distance-time graphs | Additional Science 1

Spec references J249: P2.1b J250: P2.1b. Description and animation. Distance time graphs.

Speed time graph - unbalanced forces | Curriculum Bites

Spec references J249: P2.1e J250: P2.1e. Speed time graph for a rocket related to unbalanced forces.

Velocity-time graphs | Additional Science 1

Spec references J249: P2.1e J250: P2.1e. Description and animation. Velocity time graphs.

Speed | Additional Science 1

Spec references J249: P2.1h J250: P2.1h. Calculating speed and units of speed - description and animation.

Acceleration | Additional Science 1

Spec references J249: P2.1h J250: P2.1h. Calculating acceleration and what the units mean - description and animation.

Balanced and unbalanced forces | Curriculum Bites

Spec references J249: P2.2b J250: P2.2b. Addresses misconception that objects with a force acting on them must move. Refram...

Unbalanced forces | Curriculum Bites

Spec references J249: P2.2d J250: P2.2d. Unbalanced forces cause acceleration.

Forces on a sky diver and terminal velocity | Curriculum Bites

Spec references J249: P2.2f J250: P2.2f. Speed time graph for a parachutist and terminal velocity (no parachu...

Force arrows and balanced forces | Additional Science 2

Spec references J249: P2.2c, P2.2d, P2.2f J250: P2.2c, P2.2d, P2.2f. Force arrows and balanced forces - animation and...

Force, mass and acceleration | Additional Science 2

Spec references J249: P2.2i, P2.2l J250: P2.2i. Effect of force and mass on acceleration. F = m a. Worked example. Animat...

Forces and moving objects | Additional Science 2

Spec references J249: P2.2a, P2.2b, P2.3h J250: P2.2a, P2.2b, P2.3h. Clear description and explanation of types of force aff...

Forces when falling and terminal velocity | Additional Science 2

Spec references J249: P2.2f, P2.2h J250: P2.2f, P2.2h. Falling, air resistance, balanced forces and terminal...

Work done | Additional Science 1

Spec references J249: P2.2m, P7.1c, P7.1d J250: P2.2l, P5.1c, P5.1d. Animation, description and worked example. Work done = force × distance.

Momentum | Additional Science 1

Spec references J249: P2.2k J250: P2.2k. Animation, description and worked example, p = m v. Description of force = rate of change of momentu...

Current as a flow of charge | GCSE Bitesize Revision

Spec references J249: P3.1e, P3.1g, P3.2m J250: P3.1d, P3.1f, P3.2m. Explanation and worked example Q = I t. Narrated sl...

Why do some materials become charged? | Additional Science 2

Spec references J249: P3.1a, P3.1b J250: P3.1a, P3.1b. Why insulating materials can be charged but conducting ma...

Attraction and repulsion | Additional Science 2

Spec references J249: P3.1b J250: P3.1b. Attraction and repulsion between objects ( charging by induction not addressed) - an...

Dangers and nuisance of electrostatics | Additional Science 2

Spec references J249: P3.1c J250: P3.1c. Discharging charged objects and dangers nuisance of static electricity...

Uses of electrostatics - the electrostatic dust precipitator | Additional Science 2

Spec references J249: P3.1b, P3.1c, P3.1d. Uses of electrostatics - the electrostatic dus...

Uses of electrostatics - the photocopier | Additional Science 2

Spec references J249: P3.1b, P3.1c, P3.1d. Uses of electrostatics - photocopier - animation and description.

Parallel and series circuits | GCSE Bitesize Revision

Spec references J249: P3.1e, P3.1f, P3.2a, P3.2b J250: P3.1d, P3.1e, P3.2a, P3.2b. Circuit symbols, differences between...

Potential difference | Curriculum Bites

Spec references J249: P3.2c J250: P3.2c. What is voltage (potential difference) and how is it measured? Animation and description.

Current in series and parallel circuits | Curriculum Bites

Spec references J249: P3.2a, P3.1f J250: P3.2a, P3.1e . Animated explanation of a current in series and parallel c...

Potential difference in series and parallel circuits | Curriculum Bites

Spec references J249: P3.2a J250: P3.2a. Voltage (potential difference) in series and parallel circuits.

Circuit symbols | GCSE Bitesize Revision

Spec references J249: P3.2b J250: P3.2b. Circuit symbols - narrated slides.

Ohm's law | GCSE Bitesize Revision

. Ohm's law V = IR with worked example narrated slides.

The filament lamp | GCSE Bitesize Revision

. Non-ohmic conductors - filament lamp. Circuit symbol, electrical characteristic and description. Narrated slides.

The thermistor | GCSE Bitesize Revision

. Non-ohmic conductors - thermistor. Circuit symbol, electrical characteristic and description. Narrated slides.

Light dependent resistor (LDR) | GCSE Bitesize Revision

Spec references J249: P3.2g, P3.2h J250: P3.2g, P3.2h. Non-ohmic conductors - LDR. Circuit symbol, electrical charact...

The Diode | GCSE Bitesize Revision

Spec references J249: P3.2g, P3.2h J250: P3.2g, P3.2h. Non-ohmic conductors - diode. Circuit symbol, electrical characteristic and descrip...

Electrical Power | GCSE Bitesize Revision

Spec references J249: P3.2l, P3.2m J250: P3.2l, P3.2m . Description of electrical power, P = I V, watts and kilowatts. Narrated sl...

Power and Energy in mains electricity | GCSE Bitesize Revision

Spec references J249: P3.2l, P3.2m J250: P3.2l, P3.2m . Description relating power to energy and time with wor...

Reflection | Additional Science 2

Spec references J249: P5.1g. Demonstration and description with animation of ray diagram for reflection.

Refraction | Additional Science 2

Spec references J249: P5.1g. Simple description of refraction.

Properties of waves - reflection | Curriculum Bites

Spec references J249: P5.1g. Demonstration and description with animation of ray diagram for reflection.

Properties of waves - refraction | Curriculum Bites

Spec references J249: P5.3a, P5.3d J250: P4.2j. Demonstration with description and animation of ray diagram for refraction.

Transverse and longitudinal waves | Additional Science 2

Spec references J249: P5.1e J250: P4.1e. The differences between transverse and longitudinal waves demonstrated with...

The electromagnetic spectrum | Short Circuit

Spec references J249: P5.2a, P5.2c, P5.2d, P5.2f, P5.2g J250: P4.2a, P4.2c, P4.2d, P4.2f, P4.2g. All electromagnetic waves are t...

Conduction, convection and radiation and insulation. | Curriculum Bites

Spec references J249: P5.2a, P5.2f J250: P5.2a, P5.2f. Conduction, convection and radiation, and ho...

Nuclear structure | Curriculum Bites

Spec references J249: P6.1a, P6.1d J250: P4.3a,P4.3d. Animation and description of nuclear structure of unstable nucleus (francium).

Nuclear radiation - what are alpha, beta and gamma radiation? | Curriculum Bites

Spec references J249: P6.1d J250: P4.3d. Animation and explanation of alpha, beta and gamma ...

Descriptive treatment of the relative speeds of alpha, beta and gamma | Curriculum Bites

Spec references J249: P6.1l J250: P4.3l. Animation and description of relative speed...

Penetration properties of alpha, beta and gamma. | Curriculum Bites

Spec references J249: P6.1l J250: P4.3l. Animation and description of penetration properties of alpha, be...

Lab demonstration of alpha beta gamma penetration properties. | Short Circuit

Spec references J249: P6.1l J250: P4.3l. Laboratory demonstration of the penetration propertie...

Half-life | Short Circuit

Spec references J249: P6.1j, P6.2b J250: P4.3j. Explanation and animation - Nuclear decay is random. Half-life.

Using radioactive tracers for bone scans (1) | Short Circuit

Spec references J249: P6.2c, P5.2i. Preparation and administration of a tracer for a bone scan of a rower.

Using radioactive tracers for bone scans (2) | Short Circuit

Spec references J249: P6.2c, P5.2i. Preparation and administration of a tracer for a bone scan of a rower.

Nuclear fission | Additional Science 2

Spec references J249: P6.2. Description and animation of nuclear fission.

Nuclear fusion | Additional Science 2

Spec references J249: P6.2. Description and animation of nuclear fusion.

The kilowatt-hour as a unit of energy | GCSE Bitesize Revision

Spec references J249: P7.1d J250: P5.1d. Description of the kilowatt-hour with worked example. E (kWh) = P (kW...

Kinetic energy | Additional Science 1

Spec references J249: P7.1e J250: P5.1e. Animation, description and worked example. Kinetic energy.

The kilowatt-hour as a unit of energy | GCSE Bitesize Revision

Spec references J249: P7.1d J250: P5.1d. Description of the kilowatt-hour with worked example. E (kWh) = P (kW...

Kinetic energy | Additional Science 1

Spec references J249: P7.1e J250: P5.1e. Animation, description and worked example. Kinetic energy.

Wiring a plug | Additional Science 2

Spec references J249: P8.2i J250: P6.2h. Wiring a plug. Animation with method to remember wire colour.

What is the purpose of the earth wire in a plug? | Additional Science 2

Spec references J249: P8.2i J250: P6.2h. Animation - purpose of the earth wire.

What does a fuse do? | Additional Science 2

Spec references J249: P8.2j J250: P6.2i. Animation showing domestic fuses and fuse boxes. Use of P = I V to choose the correct fuse.

Alternating and direct current | Additional Science 2

Spec references J249: P8.2h J250: P6.2g. Alternating and direct current. Description and animation.

Earthquakes | Short Circuit

Spec references J249: P8.3i. Why earthquakes happen.

Seismometer | Short Circuit

Spec references J249: P8.3i, P4.2e. How a seismometer works and use of dynamo effect.

Seismic waves (1) | Short Circuit

Spec references J249: P8.3i, P5.1e. Different types of seismic wave - primary (P) and secondary (S) waves.

Seismic waves (2) | Short Circuit

Spec references J249: P8.3i, P5.1e. Different types of seismic wave - primary (P) and secondary (S) waves.

Using seismic waves to locate the source of an earthquake | Short Circuit

Spec references J249: P8.3i. Finding the location of an earthquake.

Using an understanding of seismic waves to reduce damage to structures | Short Circuit

Spec references J249: P8.3i. Reducing the damage caused to structures during earthquakes.