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Chemicals Vs Physical Properties
Test Description: Play the review games about PS322 and fill out the study guide.
Instructions: Answer all questions to get your test result.
1) A color change happens during an experiment mixing two liquids. Is this a physical change or chemical change?
A
A color change always indicates a chemical change.
B
A color change does not mean either a physical change or a chemical change.
C
A color change can be from a physical change or a chemical change.
D
Color is a physical property, so it is only a physical change.
2) An experiment applies heat to a substance and produces a gas that is a new and different substance. Choose the true statement.
A
This represents both a physical and a chemical change
B
This represents a chemical change only.
C
This represents neither a physical change nor a chemical change
D
This represents a physical change only.
3) If a chemical change requires energy, which of the following could be the source of the energy?
A
adding more substance to the observed material.
B
heating with a flame
C
settling the mixture for 20 minutes
D
measuring mass from a balance beam
4) What is an example of adding energy to a substance and causing a physical change?
A
warming ice to produce water
B
heating a rock to make it hot
C
igniting a hydrogen-filled balloon
D
burning paper to produce CO2 and carbon
5) An experiment measures a mass, heats it over a flame without changing its state, measures it again, and finds the mass to be different. Which statement BEST describes the change?
A
Physical change because the mass melted going from a solid to a liquid.
B
Chemical change because the chemical property of mass changed.
C
Physical change because the substance becae more dense.
D
Chemical change because mass was lost, most likely as gas.
6) Which of the following is a physical change?
A
decomposition
B
evaporation
C
explosion
D
corrosion
7) Which of the following is a chemical property?
A
reactivity
B
melting point
C
hardness
D
mass
8) Chemical reactions-
A
Only occur outside living organisms
B
Produce new substances
C
Occur only in living organisms
D
Create and destory atoms
9) Which of the following occurs in every chemical reaction?
A
The total mass of the reactants equals the total mass of the products.
B
Water is given off.
C
The total mass of the reactants increases.
D
The total mass of the products is greater than the total mass of the reactants.
10) You are asked to explain what happened to individual atoms when a chemical change takes place in a lab you are doing in class. What is the best explanation?
A
Some are created.
B
They are rearranged.
C
Some are destroyed.
D
Some are destroyed and some are created.
*select an answer for all questions
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