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WorksheetsChanges in Matter
Total questions: 9
Worksheet time: 5mins
Which of the following is a chemical change?
making a lemonade
caramelization of sugar
cracking of egg
phase change
Conditions under which changes in materials happen are absence or presence of oxygen and (a) .
Under which condition does the change in the picture take place?
presence of oxygen
absence of oxygen
application of heat
Under which condition can you put out fire in the picture?
presence of oxygen
absence of oxygen
application of heat
Under which condition/s does burning take place?
presence of oxygen
absence of oxygen
application of heat
Analyze the picture. What type of change happened? What is the evidence shown? Under what condition does this happen?
chemical change; change in color; presence of oxygen
physical change; change in color; absence of oxygen
chemical change; release of gas; presence of oxygen
physical change; change in color; presence of oxygen
Analyze the picture. What type of change happened? What is the evidence shown? Under what condition does this happen?
chemical change; change in size; application of heat
physical change; change in phase; presence of oxygen
physical change; change in phase; application of heat
chemical change; change in state; absorption of heat
Why does magnesium ribbon burn?
It reacts with water triggered by light energy.
It reacts with oxygen triggered by heat energy.
It reacts with acid in the air caused by the flame.
It reacts with the smoke coming from the bunsen burner.
Mixing the following ingredients before baking is physical change.
