Physics, grade 7
16 topics for grade 7, 101 exercises. Each one starts with an explanation, then practice that adapts: get it right and the difficulty rises, get it wrong and the tutor takes the step apart.
Topics in this grade
Physical Quantities and Measurement
A physical quantity is a number describing some measurable trait of an object.
6 exercises
Uniform Motion
Motion is a changing position over time, judged against some reference body.
6 exercises
Speed and Velocity
Speed measures how much path length an object covers in one time interval.
6 exercises
Density
Density is the ratio of a solid object's mass to its own volume.
6 exercises
Force
Force is a measure of one object's action on another, in newtons.
9 exercises
Newton's Laws
The law of inertia says an object keeps constant speed with no outside action.
6 exercises
Pressure
Pressure measures how a force spreads over the surface it pushes on.
6 exercises
Atmospheric Pressure
Atmospheric pressure comes from air's own weight pressing down from above.
6 exercises
Archimedes' Principle
Archimedes' principle says a fluid pushes up on any submerged object.
6 exercises
Work, Energy, and Power
Mechanical work happens when a force moves an object along some path.
6 exercises
Simple Machines
Simple machines change a force's own value or its direction.
6 exercises
Momentum and Impulse
Momentum measures how much motion a moving object carries.
6 exercises
Structure of Matter: Atoms, Molecules, and Particle Motion
Every substance is built from tiny particles, atoms and molecules, with gaps between them.
8 exercises · about 20 min
Period and Frequency of Uniform Circular Motion
Uniform circular motion repeats itself every time an object completes one full circle.
6 exercises · about 20 min
Oscillatory Motion: Amplitude, Period, and Frequency
Oscillatory motion repeats as an object swings back and forth past one equilibrium point.
6 exercises · about 20 min
Reading a Measuring Instrument's Scale
A measuring instrument's scale carries marks spaced along its length.
6 exercises · about 20 min
Where this leads
These topics feed DTM Physics, NMT Physics, ZNO Physics.
Start with a 15-minute diagnostic
It finds which of these topics are solid and which are shaky, then builds the plan from there.
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