Science 6TH Grade

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Salim added 1 g of salt to each of four beakers filled with water. He stirred the water at different speeds, and recorded how long it took for the salt to dissolved.

Stirring - Time (sec)
No stirring - 25
Slow stirring - 18
Medium stirring - 10
Fast stirring - 6

Which conclusion should Salim draw?

a) Salt will not dissolve in water unless the water is stirred.
b) Stirring water increases the rate at which a salt dissolves.
c) Stirring water decreases the rate at which a salt dissolves.
d) Stirring has no effect on the rate at which a salt dissolves.

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