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For sixth grade students
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Soluble : will dissolve or spread all through the liquid Insoluble : will not dissolve in the liquid Solute : a solid dissolved in a liquid Solvent : the liquid a solid dissolves in
No Materials/substances
Condition after mixing with water
Dissolve / not dissolve
Mixture/ solution
1 Sugar The sugar seems disappear
Dissolve Solution
2 Salt The salt seems disappear
Dissolve Solution
3 Instant coffee
The water colour change into brown
Dissolve Solution
4 Sand The sand sink Not dissolve Mixture
5 Flour After a while the flour sink again
Not dissolve Mixture
6 Red syrup The water colour change into red
Dissolve Solution
7 Baking Powder
There is bubles produced and the powder sink
Not dissolve (the bubbles show reaction that produce gas)
Mixture
3. colander
Tools for separating mixture 1. sieves
2. paper sieves
Water and sand Decanting
Ways of separation
Liquid
Solids
Oil
Water
Mixture Ways of separation
Evaporate the water
Filtering using paper sieve
Evaporate the water
Water and salt
Ways of separation
1. State true or false for each sentence!A. Salt will dissolve in water. ( )B. Sugar dissolves quicker in hot water than cold
water. ( )C. When sweet tea is heated, the sugar evaporates.
( )D. Stirring makes insoluble solids dissolve quicker.
( )
a. What can they do to make Stage A quicker?b. What substance is removed at Stage B?c. What substance remains in the evaporating
dish at Stage C?d. Complete these two sentences. Choose
words from the list.insoluble solvent solid soluble solution
A solid dissolved in water is a ……………. A substance that can dissolve in water is
……….
Which student has the correct answer to the teacher’s question? Choose from student A, B, C or D.
A. What has happened to the salt?
B. She then pours some of the solution into a basin and heats it.
When the salt solution is heated salt crystals are formed.What has happened to the water?
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