Keywords, Fast Facts

KEYWORDS

Matter                    Particles

Volume                Mass

Compressibility   Diffusion

Fluids                  Mixture

Handpicking       Threshing

Winnowing         Sieving

Magnetic separation Sedimentation

Decantation Adulteration   Filtration

FAST FACTS

* Matter is anything that has mass and occupies space.

* All matter is made up of extremely small particles.

* Matter is classified into solids, liquids and gases on the basis of two important factors .

a. The way the particles are arranged

b. The way the particles attract each other.

* Difference between the properties of solids, liquids and gases is due to the difference in the arrangement of the particles and the nature of the attractive forces between them.

* A pure substance can be an element or a compound and is made up of only one kind of particles.

* A mixture is an impure substance containing two or more components physically mixed in any proportion.

* Separation of mixtures is done

1. to remove harmful components

2. to obtain the useful component

3. to obtain a substance in a highly pure form

* Separation method to be adopted depends on the properties of the components.

* Handpicking – For smaller quantities containing particles reasonably large in size to be recognised can be picked by hand

* Winnowing – Adopted to separate lighter solids from heavier ones

* Magnetic separation – Used to separate magnetic substance from non-magnetic substance

* Sedimentation – Settling down of suspended, insoluble and heavy solid particles (used to separate solid – liquid mixtures)

* Decantation- Process of pouring out the clear supernatant liquid without disturbing the sediment

* Filtration –Process of separating insoluble solid particles (residue) from a liquid (filtrate) by using a filter paper.

* Adulteration – make impure by the addition of a foreign or inferior substance.

ICT CORNER

Types of matter

Lets play with Science kids

Steps:

* To learn more about the matter around us type Science Kids in the Google browser and select games Go inside and select matter. Now the following logo can you drag will appear on the screen. Then click ok.

* Three divided columns will appear on the screen. The first section is for solid and the second section is for liquid and the third one is for gas. Now when we press this symbol, at the bottom items will appear at the bottom. We have to drag them to their respective column.

URL:

http://www.sciencekids.co.nz/gamesactivities/gases.html