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Interactive Grade 7 Science Chemical vs Physical Changes Test

Science · Grade 7 · 15 questions · 10 min

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Chemical vs Physical Changes
1.
A coloured dye is separated from a mixture using chromatography. What type of change is this process?
2.
Hydrogen peroxide (H₂O₂) breaks down into water and oxygen gas when a small amount of yeast is added. What type of change is this?
3.
A student dissolves a spoonful of instant coffee in hot water. The water turns brown and smells like coffee. What type of change is this?
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