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7TH GRADE

Grade 7 Physics Lessons

Observations and measurements, motion, forces, pressure, mechanisms and energy. Grade 7 physics topics and lessons with theory, physical quantities, formulas, and related problems.

8 those19 lessons

Physics and measurements

Phenomena, experiment, quantities and accuracy of measurements.

2
Physical phenomena and research method16 min · What physics studies and how observation turns into a testable experiment.Measuring instruments and accuracy22 min · SI units, scales, division values, direct and indirect measurements.

Structure of matter

Particles, diffusion, interaction and states of aggregation.

2
Particles of matter and diffusion18 min · Molecules, particle motion, Brownian motion and diffusion.Interaction between particles and states of matter18 min · Attraction, repulsion and differences between solids, liquids and gases.

Mechanical movement

Frame of reference, path, speed, graphs and acceleration.

2
Frame of reference, trajectory and path18 min · Relativity of movement and ways to describe body position.Speed, average speed and graphs24 min · Uniform and uneven motion, formula of motion and basic acceleration.

Mass and density

Inertia, mass, volume and density of matter.

2
Inertia, interaction and mass18 min · Why speed does not change instantly and how the masses of bodies are compared.Volume and density of matter22 min · Determination of density and calculation of mass or volume.

Powers

Gravity, elasticity, weight, resultant and friction.

3
Strength, heaviness and body weight22 min · Force as a measure of interaction, heaviness, weight and weightlessness.Elasticity and resultant24 min · Deformation, Hooke's law, dynamometer and addition of forces on one straight line.Friction force18 min · Static, sliding and rolling friction in technology and everyday life.

Pressure

Pressure of solids, liquids, gases and hydraulic devices.

3
Solid pressure and Pascal's law22 min · Support area, gas pressure and pressure transfer in liquids.Hydrostatic pressure and blood vessels22 min · Dependence of pressure on depth and equilibrium in communicating vessels.Atmospheric pressure and hydraulics24 min · Barometer, pressure gauge, pump and power gain of a hydraulic press.

Archimedes' strength and swimming

Pushing, navigation conditions, ships and aeronautics.

2
Archimedes' power22 min · Origin of buoyant force and its measurement.Floating bodies, ships and balloons20 min · Descent, ascent, balance and average density.

Work, power and energy

Work, simple mechanisms, efficiency and energy conversion.

3
Mechanical work and power20 min · When work is done and how the speed of its completion is compared.Levers and blocks24 min · Arm of force, moment, lever balance and the golden rule of mechanics.Efficiency and mechanical energy24 min · Useful and total work, kinetic and potential energy.