Physics

Current in parallel

• Current in parallel circuits

Electric current

• Electric current

Electrical resistance

• Electrical resistance

Fixing faulty circuits

• Faults in circuits

Length of a wire

• Resistance and wire length

Mains electricity

• Mains electricity safety

Making a series circuit

• Building a series circuit

Measuring voltage

• Voltage and the voltmeter

Parallel circuits

• Parallel circuits

Series vs parallel

• Comparing series and parallel circuits

Static electricity

• Static electricity

Thickness of a wire

• Resistance and wire thickness

Voltage in parallel

• Voltage in parallel circuits

Energy stores intro

• Energy and where it is stored

Transferring energy

• Transferring energy between stores

Balanced and unbalanced forces

• Balanced and unbalanced forces

Different kinds of force

• The different kinds of force

Floating and density

• Floating, mass and shape

Force arrows

• Using force arrows in diagrams

Friction

• Friction

Gravity and weight

• Gravitational force and weight

Hooke's law

• Hooke's Law and force-extension

Levers and moments

• Levers and turning forces

Measuring forces

• Measuring forces in newtons

Pressure

• Pressure (force over area)

Pressure with depth

• Pressure at different depths and heights

Reducing friction

• Reducing friction

Stretching rubber

• Stretching rubber (non-linear extension)

Stretching springs

• Stretching springs

What forces do

• What forces do

Cooling

• Cooling

Heating and energy transfer

• Heating and thermal equilibrium

Measuring temperature

• Measuring temperature

Thermal conductors

• Thermal conductors and insulators

Focusing light

• Focusing light with lenses

How we see

• How we see things

Pinhole camera

• The pinhole camera

Reflected images

• Reflected images in mirrors

Reflecting colour

• How surfaces reflect colour

Reflection from mirrors

• Reflecting light from mirrors

Refraction

• Refracting light

Seeing in colour

• Seeing in colour

Shadows

• How shadows form

Visible spectrum

• The visible spectrum

Electromagnets

• Electromagnets

Increasing electromagnet strength

• Current and electromagnets

Magnetic field lines

• Magnetic field of a bar magnet

Magnetic poles

• Magnetic poles

Using electromagnets

• Using electromagnets (motors, bells)

Changing speed

• Changing speed (acceleration intro)

Distance-time graphs

• Distance-time graphs

Measuring speed

• Measuring speed accurately

Newton's First Law

• Newton's First Law of motion

Parachutes

• Investigating parachutes

Speed

• Calculating speed

Streamlining

• Streamlining and reducing drag

Reflecting and absorbing sound

• Reflecting and absorbing sound (echoes)

Sound vibrations

• Sound vibrations

Travelling sound

• How sound travels through a medium

Day and night

• The spinning Earth

Gravity in space

• Gravity and weight

Seasons and Earth's tilt

• Seasons and Earth's tilt

Stars, galaxies, universe

• Stars, galaxies and the universe

The solar system

• Our solar system

Hearing

• The auditory range and hearing

Sound waves

• Sound waves as longitudinal waves

Speed of sound

• Speed of sound in air, water, solids

Ultrasound

• Ultrasound and its uses

Water waves

• Water waves