Font size
WorksheetsChemical Changes Review
Total questions: 10
Worksheet time: 6mins
Which of the following is a sign of a chemical reaction?
Changes size
Turns from a square to a circle
Precipitate forms
It is soluble
The substances we start out with in a chemical reaction are called what?
Products
Reactants
Law of Conservation of Mass
Energy
A bonfire is an example of what type of reaction?
Exothermic
Endothermic
Radioactive
Conservation Energy
In an endothermic reaction, what happens to the temperature?
Increases
Decreases
Stays the same
In the following chemical equation, which substances are the products? Select all that apply.
Zn + 2HCl ---> ZnCl2 + H2
Zn
2HCl
ZnCl2
H2
What happens to the number of atoms in a chemical reaction?
Stays the same
Increases
Decreases
What scientific law states that matter cannot be created nor destroyed?
Law of Conservation of Atoms
Law of Conservation of Mass
Law of Physics
There isn't one. Matter can be created.
Ice melting is an example of what?
Physical change
Chemical change
Wood burning is an example of what?
Physical change
Chemical change
Eggs cooking is an example of what?
Physical change
Chemical change
