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8TH GRADE

Grade 8 Physics Lessons

Thermal processes, electrical circuits, magnetism and electromagnetic induction. Grade 8 physics topics and lessons with theory, physical quantities, formulas, and related problems.

10 those24 lesson

Thermal phenomena

MCT, temperature, internal energy and heat transfer.

4
MCT and surface phenomena22 min · MCT positions, states of aggregation, wetting and capillaries.Temperature and internal energy22 min · Thermal equilibrium, temperature scales and ways to change internal energy.Thermal conduction, convection and radiation20 min · Three methods of heat transfer and their application.Amount of heat and heat balance28 min · Specific heat capacity, calorimeter, fuel and energy conservation.

Change in state of aggregation

Melting, evaporation, moisture and boiling.

3
Melting, crystallization and graphs24 min · Melting temperature and phase transition energy.Evaporation, condensation and humidity24 min · Saturated steam and relative humidity measurement.Boiling and vaporization22 min · Boiling point, pressure and specific heat of vaporization.

Heat engines

Gas operation, engine design and efficiency.

2
Gas operation and engine design22 min · Gas expansion, internal combustion engine and steam turbine.Heat engine efficiency and environment20 min · Energy conversion, inevitable losses and environmental consequences.

Charge and electric field

Electrification, atom, law of conservation of charge and field.

3
Electrification, conductors and dielectrics20 min · Two types of charge, electroscope and charge redistribution.Atomic structure and charge conservation22 min · Electron, ions, divisibility and the law of conservation of charge.Charge interaction and electric field26 min · Coulomb's law, tension, benefits and dangers of static electricity.

Electric current

Sources, circuits, current and voltage.

2
Electric current and circuit22 min · Conditions for the existence of current, sources, direction and effects of current.Current, voltage and devices26 min · Ammeter, voltmeter and safe switching on of devices.

Resistance and Ohm's Law

Conductor resistance, Ohm's law and rheostat.

2
Resistance and Ohm's Law24 min · Relationship between current, voltage and resistance of a circuit section.Conductor resistance and rheostat24 min · Material, length, cross-section and current regulation.

Conductor connections

Series, parallel and mixed circuits.

2
Serial connection22 min · Current, voltage and equivalent resistance of a series circuit.Parallel and mixed connection26 min · Current fan-out, common voltage and basic mixed circuits.

Work and current power

Electrical energy, heating and safety.

2
Operation, power and energy consumption24 min · Electrical work, appliance power and household energy metering.Thermal effect of current and safety24 min · Joule-Lenz law, heaters, short circuits and protection.

Magnetic phenomena

Magnetic fields, electromagnets and motor.

2
Magnetic field and electromagnet22 min · Permanent magnets, current field, coil and application of electromagnets.Magnetic field action and motor24 min · The Earth's field, the left-hand rule and the principle of the electric motor.

Electromagnetic induction

Induction current, Lenz's rule and energy production.

2
Electromagnetic induction and Lenz's rule24 min · Magnetic flux, occurrence and direction of induction current.Generator and transmission of electrical energy24 min · Conversion of mechanical energy and transmission with changes in voltage.