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WorksheetsChemistry Unit Test Review
Total questions: 25
Worksheet time: 25mins
A physical change is
a change where the characteristics do not change the substance
a change where the characteristics do change the substance
a change where the chemistry changes
What is the definition of chemical change?
any change that results in the formation of one (or more) new chemical substance(s)
changing of only the appearance of the object
matter cannot be created or destroyed, only change form
changes affecting the form of a chemical substance, but not its chemical composition
Which of the following are examples of chemical changes? Select all that apply!
Iron Rusting
Gas Burning
Breaking a Glass
Boiling Water
Burning Wood
Sugar dissolving in water is a
Chemical Change
Physical Change
Which of the following is NOT an indicator of chemical changes?
Unexpected color change
Dissolving
Light production
Gas formation
Select ALL the characteristics of a physical change.
changes in appearance only
a new substance is not created
changes the pH level
chemical bonds are not created or broken
burning and fire
All ____________ are made up of two or more atoms bonded together.
atoms
molecules
mixtures
matter
What is a mixture?
an atom
2 or more substances that are together in the same place, but their atoms are not chemically bonded
a substance that cannot be broken down into any other substances by physical or chemical means
A substance made of 2 or more elements that are chemically
combined in a set ratio
This diagram represents...
An element
A molecule
A compound
A mixture of elements and compounds
To change from one state of matter to another state of matter is called?
phase change
potential change
kinetic change
thermal change
When the temperature of matter increases the particles...
speed up and move closer
speed up and move farther apart
slow down and move closer together
slow down and move farther apart
If reaction starts with 20g of reactants, it will produce ---
a total of 40g of product
a total of 10g of product
a total of 80 g of product
a total of 20g of product
If there are 4 H atoms on the reactant side, how many H atoms will be on the product side?
2
4
6
8
Is the equation below balanced and following the law of conservation?
2H2 + 2O2 --> H2O
Yes
No
2H2 + O2 --> 2H2O
What is the right part of a chemical equation called?
2H2 + O2 --> 2H2O
Reactants
Products
Yields
Chemical Equation
