EL#04 Chemical Reactions Review
Quiz
•
Science
•
8th Grade
•
Medium
Standards-aligned
Jeff Peterson
Used 6+ times
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20 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The law of conservation of mass states that:
Mass can be created or destroyed in a chemical reaction.
Mass is neither created nor destroyed in a chemical reaction.
Mass is always increased in a chemical reaction.
Mass is always decreased in a chemical reaction.
Tags
NGSS.MS-PS1-5
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Is this balanced? 2Al + N₂ → 2AlN
Balanced
Unbalanced
Tags
NGSS.MS-PS1-1
NGSS.MS-PS1-5
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Is this balanced? KI + Cl₂ → 2KCl + I₂
Balanced
Unbalanced
Tags
NGSS.MS-PS1-5
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Count the atoms for each element: C₈H₁₀N₄O₂.
Carbon = 8, Hydrogen = 10, Nitrogen = 4, Oxygen = 2
Carbon = 6, Hydrogen = 12, Nitrogen = 2, Oxygen = 1
Carbon = 7, Hydrogen = 8, Nitrogen = 3, Oxygen = 2
Carbon = 8, Hydrogen = 9, Nitrogen = 4, Oxygen = 3
Tags
NGSS.MS-PS1-1
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
9. Which of the following best defines a 'chemical change'?
A change in which the substance retains its original properties.
A change that only affects the physical appearance of a substance.
A change that results in the formation of new chemical substances.
A change that can be easily reversed by physical means.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is frying an egg considered a chemical reaction?
Because it changes the physical state of the egg.
Because it involves a change in the chemical composition of the egg.
Because it is a reversible process.
Because it only involves heat transfer.
Tags
NGSS.MS-PS1-1
NGSS.MS-PS1-2
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
12. What are the signs or evidence a chemical reaction has occurred?
Change in color, temperature, formation of a precipitate, or gas production
Increase in mass and volume
Decrease in temperature and pressure
No observable change
Tags
NGSS.MS-PS1-2
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