UNIT 5: WATER
Do all substances dissolve in water? Let us nd out.
This activity will be carried out in groups of 4 to 6.
What you need
• transparent glasses or plastic cups
• plastic spoons
• tap water
• white sugar
• kitchen salt
• sand (coral sand)
• rice grains
Instructions
1. Take 4 glasses per group; label them A, B, C and D.
2. Half ll glasses A and B with water as shown in Figure 11.
3. Put some sugar in glass A and some sand in glass B.
4. Use spoons to stir the water for one minute in both glasses.
5. Observe the water.
6. Can you see the sugar? ......................................................
7. Can you see the sand? ......................................................
8. Repeat the same activity with salt (Glass C)
and rice grains (Glass D).
Activity
DISSOLVING SUBSTANCES
IN WATER
4
Figure 11
Glass A Glass B
Stir:
mix using a spoon
or rod
9