Question

what is physical and chemical change what are the type of pure substance and what is motion​

Answer 1

Answer:

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Explanation:

A chemical change results from achemical reaction, while a physical change is when matter changes forms but not chemical identity. Examples ofchemical changes are burning, cooking, rusting, and rotting. Examples of physical changes are boiling, melting, freezing, and shredding.

The pure substance within chemistry is a very simple concept to grasp. Pure substances aredefined as substances that are made of only one type of atom or only one type of molecule (a group of atoms bonded together). ... Purity can also have an important impact on the chemical properties of a substance.

motion means displacement or change in the position of an object over time. It can be described in terms of displacement, distance, velocity etc. eg pushing a block is an exampleof linear motion, opening a door is an exampleof rotation, rotating stone with attached thread is an example of a circular motion.

Answer 2

Physical changes may be defined as those changes in which the state of matter changes .

Chemical change may be defined as the change in which chemical properties changes.

There are two types of pure substances = Element and compound .

Motion is the physical quantity in which any body changes its position....

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