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Chemical Reactions 8.P.1.4
Test Description: Signs of chemical reaction, catalyst, reactant, product, conservation of mass
Instructions: Answer all questions to get your test result.
1) You burn a candle wick to create CO2 and ash. What are the PRODUCTS of this reaction?
A
Candle wick and oxygen
B
Candle wick
C
CO2 and ash
D
CO2 and the candle wick
2) You burn a candle wick to create CO2 and ash. What are the REACTANTS in this reaction?
A
CO2 and ash
B
candle wick and oxygen
C
Candle wick
D
CO2 and the candle wick
3) You burn a candle wick to create CO2 and ash. Which of these statements is true?
A
The mass of the wick is GREATER than the mass of the CO2 and ash combined.
B
The mass of the wick and oxygen is LESS than the CO2 and ash.
C
The mass of the wick and oxygen is GREATER than the CO2 and ash.
D
The mass of the wick and oxygen is THE SAME as the CO2 and ash.
4) Doctors put a testing chemical into a sample of blood, which then turns bright green. Which statement is true?
A
The chemical and the blood must have both been bases
B
You just saw a chemical reaction
C
You just saw a physical change
D
The chemical and the blood must have both been acids
5) An engineer dissolves oxygen into a new soda shes's creating. Which of these is true?
A
This is a chemical reaction
B
This is combustion
C
This would make a heterogeneous mixture
D
This would make a homogeneous mixture
6) In a chemical reaction...
A
... atoms are rearranged but not created or destroyed
B
... all compounds remain the same
C
... atoms are created and destroyed
D
... there is always fire
7) A pharmacist accidentally mixes two liquid medicines together. The beaker they were in grows very hot. This must be...
A
A physical reaction
B
A chemical reaction
C
It's impossible to make this happen!
D
Combustion
8) A chef heats up a soup until it begins to bubble. This is...
A
A physical change
B
Proof that aliens exist
C
Why we can't have nice things
D
A chemical change
9) Iron heats up faster than plastic.
A
Iron must have a lower boiling point than plastic
B
Iron must have a lower specific heat than plastic
C
Iron must have a higher specific heat than plastic
D
Iron must have a higher boiling point than plastic
10) Chemical properties...
A
Can only be seen in chemical reactions
B
Change over time
C
Can not be observed
D
Include specific heat, density, and pH
*select an answer for all questions
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