EL#04 Chemical Reactions Review

EL#04 Chemical Reactions Review

8th Grade

20 Qs

quiz-placeholder

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EL#04 Chemical Reactions Review

EL#04 Chemical Reactions Review

Assessment

Quiz

Science

8th Grade

Medium

NGSS
MS-PS1-5, MS-PS1-2, MS-PS1-1

Standards-aligned

Created by

Jeff Peterson

Used 6+ times

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20 questions

Show all answers

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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