In this activity game, you will need to choose the correct answer from the choices given.
Your goal is to demonstrate an understanding about the substances that change colour of water.
Note: You can click on play icon to listen to the audio before answering your questions.
Good luck and enjoy your learning about colour changes of water in an interactive way!
1
Which pair of substances both dissolve and change the colour of water?
2
Which substance would you choose to clearly show a colour change to a friend?
3
Which substance gives a yellow colour to water when mixed?
4
Why do some substances change the colour of water while others do not?
5
Does sand dissolve and change the colour of water?
6
If you add food colouring and kitchen salt to water, what do you think will happen?
7
How does mixing art paint with water differ from mixing soil with water?
8
“Anything that dissolves in water will change its colour.” Do you agree or disagree?
9
According to you, which conclusion is correct?
Feedback
Sand does not dissolve in water while kitchen salt does and do not change their colour, food coloring and juice powder dissolves in water, making the water change colour. Soil and sand do not dissolve in water. Kitchen salt and sugar dissolve but do not change the colour of the water.
Coffee powder dissolves or spreads in water and gives it a brown colour, so it clearly shows a colour change. Salt and sugar dissolve but do not change the water colour, and sand stays at the bottom without colouring the water.
Turmeric powder dissolves and turns the colour of water yellow. Sand does not dissolve, kitchen salt dissolves but does not change the colour, and cocoa powder turns colour of water brown.
Some substances change the colour of water because they have their own natural colour. When they dissolve, their colour spreads out evenly in water, changing its colour. For example, food colouring, juice powder, or ink.
Other substances do not change the colour because they are colourless. For example, sugar and kitchen salt.
Sand does not dissolve in water and settles at the bottom, so it does not change the colour of the water.
Only coloured substances that can MIX or DISSOLVE, like turmeric or cocoa powder can change colour of water.
When you add food coloring to water, the water changes colour because the food color mixes completely with the water.
When you add kitchen salt, the water does not change colour because salt dissolves but has no colour, so the water still looks the same.
Therefore, only the coloured substance such as the food color will change the colour of water.
When you mix art paint with water, it dissolves or spreads out, and the water changes colour evenly.
When you mix soil with water, it does not dissolve. The pieces of soil sink to the bottom or float, so the water becomes muddy and turns brown, but the soil does not mix evenly like art paint.
The answer is 'disagree'. Not everything that dissolves in water changes its colour.
Some substances, like sugar or kitchen salt, dissolve but are colourless, so the water stays the same colour.
Other substances, like ink, juice powder or food colouring, dissolve and have colour, so they change the colour of water.
This shows that dissolving is not the same as changing colour. A substance must also have colour to change the colour of water.
A - Colourless substances like kitchen salt and sugar do not change colour of water.
B - Not all substances make water colored. Kitchen salt, sugar or sand do not change colour of water.
C - There are substances that dissolve in water, changing its colour. For example: food color.
D - Some substances, like coffee or turmeric powder, change the colour of water because they have colour and can spread in it. Other substances, like salt, sugar, or sand, do not change the colour of water.
So the most correct conclusion is that some substances change the colour, and some do not.
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