Mixture

What is the relationship between water temperature and the solubility of substances?

• The hotter the water temperature, the easier it is for substances to be soluble.

• Hot water makes other materials hard.

• Warm water allows the process of mixing between substances.

• Low temperature of water makes it difficult for other substances to form themselves.

Why hot water can make substances be soluble?

• Hard materials such as rock can be mixed and dissolved in water if the temperature is warm.

• The substances can mix since they form themselves better.

• Substances can dissolve faster and better due to the high temperature of the liquid.

• The substances are able to mix because it doesn't break.

Choose the correct statement below.

• Big substances take short time to dissolve in liquid.

• Cold water makes it easy for substances to mix.

• Small substances can dissolve in water very quickly.

• Materials like sand can mix with water easily.

Can we separate substances?

Answer 'Yes' or 'No'

(a)  

We can use the tool to ...

• hand pick the substance

• separate the iron fillings and sand

• separate the rock and from water

• filter out any substance

Which substance isn't water soluble?

• Salt

• Flour

• Rock

• Sugar

Which substance isn't water soluble?

• Lemon juice

• Salt

• Powder

• Seed

Which substance is water soluble?

• Bread

• Powder

• Marble

• Iron

Which substance is water soluble?

• Silver

• Gold

• Iron

• Sugar

Which substance is water soluble?

• Oil

• Pin

• Hair

• Flour