Question

*science*
Test no :3
Answer these questions;
1.what are physical changes?Give examples.
2.Explain the formation of rust.​

Answer 1

Answer:

1. physical changes are those which change their state of nature through physical components and which we can see them and touch them ....for example falling of leaflets from a tree.
2. when the oxides of carbon and hydrogen reacts the with iron with the help of mixtures in the atmosphere...it develops a thick reddish brown layer known as rust

Answer 2

Explanation:

properties such as shape, size ,colour and state of a substance are called tis physical properties. A change in which in which a substance undergoes a change in its physical properties is called physical

Example is crystallisation

duand ast is the atmosphere is produced by saltation and sand bllasting of sandsized grains and it is transported through troposphere.this airborne dust is considered an aerosol and once in theatmosphere ,it can be produce strong local radiactive forcing.