Chapter XI Colorful Material World
(1) Universe and microcosm.
② Quality
③ Density
(4) Measuring the density of substances
⑤ Density and social life
Chapter XII Movement and Force
① Motion description
② the speed of movement
③ Length, time and its measurement
④ Force
⑤ Newton's first law
⑥ Balance of two forces
Chapter XIII Force and Machinery
① elastic spring dynamometer
② Gravity
③ Friction.
④ lever
⑤ Other simple machinery
Chapter XIV Pressure and Buoyancy
① pressure
② liquid pressure
③ Atmospheric pressure
④ Relationship between fluid pressure and flow velocity
⑤ buoyancy
⑥ Application of buoyancy
Chapter 15 Work and Mechanical Energy
① Work
② Mechanical efficiency
③ Power
④ Kinetic energy and potential energy
⑤ Mechanical energy and its transformation
Chapter 16 Heat and Energy
① Molecular thermal motion
② Internal energy
③ Specific heat capacity
④ Heat engine
⑤ Transformation and conservation of energy
Chapter 17 energy and sustainable development
① Energy family
② Nuclear energy
③ Solar energy
④ Energy revolution
⑤ Energy and sustainable development
Math 9 (if you don't list each section one by one, just write some key points)
Chapter 21 Quadratic Radicals
Addition, subtraction, multiplication and division of quadratic root
Chapter 22 One-variable quadratic equation
Solving practical problems of quadratic equation with one variable
Chapter 23 Rotation
The center of rotation of a graph is symmetrical.
Chapter 24 Circle
Position relation related to circle: arc length and sector area of regular polygon and circle.
Chapter 25 Preliminary Probability
Find probability by enumeration and estimate probability by frequency.
In the ninth grade chemistry class
Unit 1 Entering the Chemical World
1 Changes and properties of substances
Chemistry is a subject based on experiments.
3 walk into the chemistry laboratory
Unit 2 The air around us
1 air
2 oxygen
3 making oxygen
Unit 3 Water in Nature
1 composition of water
molecules and atoms
3 Purification of water
4 Care for water resources
Expand the lightest gas in the project (don't underestimate this, it's also important)
Unit 4 The Mystery of Material Composition
1 composition of atoms
Element 2
3 ion
4 chemical formula and valence
Unit 5 Chemical Equation
1 law of conservation of mass
2 How to write chemical equations correctly
3 Using simple chemical equations to calculate
Unit 6 Carbon and Carbon Oxide
1 diamond, graphite and C60
Preparation of carbon dioxide
Carbon dioxide and carbon monoxide
Unit 7 Fuel and Its Utilization
1 combustion and fire extinguishing
2 fuel and heat
3 the impact of using fuel on the environment
Comprehensive utilization of oil and coal.