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Worksheetsevidence of chemical reaction
Total questions: 11
Worksheet time: 10mins
You know that a chemical reaction has occurred if
there is a precipitate (new solid)
there is a color change.
there is a temperature change.
All of these answers are evidence.
heat or light is produced
1. How is a chemical change different from a physical change?
there is no difference
a physical change creates a new substance
a chemical change creates a new substance
Which of the following IS a physical change?
Getting a haircut
Rusty metal
A compound
sour milk
A chemical change is different than a physical change because in a chemical change
chemicals are used
molecules do not physically touch
a new substance is formed and in a physical no new substance is formed
the change can be seen but in a physical change it cannot
In chemical reactions, what does the Law of Conservation of Matter mean?
Matter is not created or destroyed.
The total mass of the reactants is greater than the total mass of the products.
The total mass of the reactants is less than the total mass of the products.
Matter is not changed.
