Chemistry

Sep methods -Definitions

100

Method of separation using hands

Handpicking

200

Separating lighter substances from heavier substances

Winnowing

300

The process of pouring slowly 

Decantation

Solid-solid mixtures

100

The process of separating bigger particles from smaller particles 

Sieving

200

Beating hard on a surface

Threshing

300

Pearls of different sizes can be separated by

sieving

Solid-liquid mixtures

100

The method of separating insoluble solid from liquid using a filter paper is 

Filtration

200

The process of sand particles settling down in water is

Sedimentation

300

The clear liquid in the container after filtration is

Filtrate

Changes - definitions

100

Final substance can be brought back to its original form

Reversible change

200

Final substance cannot be brought back to its original form

Irreversible change

300

Difference between physical and chemical change

Any valid difference

Changes - examples

100

Melting of ice candy

Reversible/physical

200

Ripening of mango

Irreversible/chemical

300

Mixing cement and water

Irreversible/chemical