What happens when matter goes through a

physical change?

What is matter?

Matter is everything around us that

takes space

Matter can be:(1) Solids:

(2) Liquids:

(3) Gases:

The air inside the balloon

Daddy, Can a matter change?

Of course dear, matter can change

Really? How is that?

Matter can change its

shape & size, let’s see….

It’s the change in the way matter looks.

{ Matter may look different in shape & size, but it’s still the

same matter}

Physical change of matter

Examples

1- Tearing a sheet of paper{It’s a kind of physical change, as the shape & the size of the paper

change, but it is still the same paper}

2- When we put water in freezer{It’s a kind of physical change, as

water freezes into ice, so it change from liquid to solid “ice”

but it is still water }

3- Pulling a rubber band{It’s a kind of physical change, as when we stretch a rubber band, it

stretches & return back to its size, But it is still the same

band }

Take care !!!!- Burning a sheet of paper is

not a physical change, as if the paper is burned to ash, it’s not a paper any more & we cannot return it back to paper again.

- Burning a match is not a physical change, as when the match burns, it’s not a match any more & we cannot return it back to match again.

- Baking a Cake from eggs, milk & flour is not a physical change, as we cannot return back the cake into eggs, milk & flour.

What is a mixture?Mixture is formed when different kinds

of matter mixed together

Examples:

Salad is a mixture of vegetables

Soil is a mixture of rocks & minerals

Air is a mixture of gases

Cocktail juice is a mixture of fruits

What is a solution?Solution is a kind of mixtures, which is formed when 2 or more kinds of matter

are mixed evenly “completely” into another kind of matter

Examples: Salt water is a solution

“When you mix salt with water, salt dissolve (disappear) into the water, we

don’t see it but it is still in there”

Sugar with water is a solution

Note: Not all solutions are liquids, Some solutions are made of solids too

How can we separate mixtures?

1- Picking up

Examples:1- Separating a mixture of meatballs & spaghetti

2- Separating mixture of nuts in a pack of nuts

2- By Magnets

Examples:1- Separating a mixture of sand & paper clips paper clips will be attracted to magnets & sand will stay behind

1- Separating a mixture of flour & iron Filing's Iron Filing's will be attracted to magnets & flour will stay behind

3- Filtration

Examples:- Separating a mixture of sand & water Using filter paper sand will stay in the filter paper & water will pass through

When we heat water, it evaporates & becomes gas.

4- Evaporation

Examples:

- Separating a mixture of sugar & water When we add sugar to water & stir, sugar dissolves “disappear’ in the water,, to separate them: Heat the mixture Water evaporates Sugar stays behind