Y5 Science - Materials

• Science
• Primary Education

Materials

What do you remember
about properties of
materials?

Today we are learning...

That some materials dissolve in liquid

The correct vocabulary to describe how solids dissolve into liquid

How to plan a fair test

Key Vocabulary

Soluble -  a material that will dissolve when mixed with a liquid.

Insoluble - materials that don't dissolve in a liquid and the particles are still visible.

Dissolve  - When a solid becomes incorporated into a liquid to form a solution.  

Solution - When a substance dissolves, it might look like it has disappeared, but in fact it has just mixed with the water to make a transparent (see-through) liquid called a solution.

Do all solids dissolve in liquids? 

Materials that dissolve into liquids are called soluble.

Some examples of soluble materials are...

 The solid has not ‘disappeared’ or ‘vanished’ but is still in the liquid; it has just combined with the particles in the liquid to become part of the liquid. This is not a permanent change. No new materials have formed, and the

solid can be recovered from the solution.

Investigating which materials are soluble

Today you are going to test which of the following materials are soluble

• flour
• rice
• baking powder
• jelly
• oil
• vinegar

Fair test

You need to plan a fair test...

What is being tested?

What will stay the same?

What will you change?

What will you measure?

What are your predictions?

Before you start...
What does dissolve mean?

1. when a solid melts into a liquid
2. when a solid becomes incorporated into a liquid
3. when a solid disappears into liquid
4. when a liquid disappears and becomes a gas

Record your results in a table

Material

Soluble or insoluble?

Soluble

Insoluble

How did it go?

😒🙁😐🙂😃

Which is the odd one
out and why?

Coffee and powdered drinks dissolve in water, tea is loose leaf and is either kept in a teabag or tea strainer.  It brews but does not dissolve.