Question

important points from force and pressure, friction, cells and structures of class 8.

please mention each chapter seperately

and no spam or u ll regret it. and im not lying when i say tht​

Answer 1

Answer:

force , presure are same chapter( it is chapter 12

cell and structure = chapter 8

i hope u understand my answer

Answer 2

Answer:

force and pressure :-

• force could be a push or pull
• a force arises due to the interaction between two objects
• force has magnitude bas well as direction
• a change in the speed of an object it the direction of its motion or both implies a change in it
• 's state of motion
• force acting on an object may cause a change in it's state of motion or a change in it's shape
• a force can act on an object with or without being in contact with it
• force per unit area is called pressure
• liquid and gases exert pressure on the walls of their containers
• the pressure exerted by air around us is known as atmospheric pressure

friction:-

• Friction depends on the nature of surfaces device in contact.
• For a given pair of surfaces, friction depends upon the state of smoothness or roughness of those surfaces. It is less for smooth surfaces.
• Friction is independent of the area of contact.
• Friction depends on how hard the two surfaces pressed together.

cells and structure :-

• bricks are assembled to make a building. similarly, cells are assembled to make the body of every organisms
• Robert hook in 1665 observed slices of cork under a simple magnifying device.
• cork is a part of the bark of a tree. he took thin slices of cork and observed them under a microscope.
• both bricks in a building and cells in the living organisms are basic structural units
• organisms made of more than one cell are called multicellular
• the number runs into billions and trillion. human body has trillion of cells which vary in shape and size

Explanation:

hope it's helpful

I'm also in 8