7th Grade Balancing Equations Quiz
Authored by Pam Evans
Science
8th Grade
NGSS covered
Used 312+ times
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About
This quiz focuses on balancing chemical equations and understanding chemical formula notation, making it appropriate for 8th-grade physical science students who are learning foundational chemistry concepts. The questions systematically assess students' ability to identify and count atoms in chemical formulas, distinguish between balanced and unbalanced equations, and apply coefficients to achieve conservation of mass in chemical reactions. Students need a solid understanding of chemical notation including subscripts (which indicate the number of atoms of each element) and coefficients (which multiply entire compounds), along with the ability to systematically count atoms on both sides of an equation. The quiz also tests vocabulary knowledge of chemical equation components such as reactants, products, and the principle of conservation of mass, requiring students to understand that matter cannot be created or destroyed in chemical reactions. Created by Pam Evans, a Science teacher in the US who teaches grade 8. This quiz provides an excellent tool for assessing student mastery of chemical equation balancing before moving on to more complex stoichiometry concepts. Teachers can use this as a formative assessment during instruction to identify students who need additional support with atom counting and equation balancing, or as a summative quiz following a unit on chemical reactions. The variety of question types, from basic atom counting to multi-step equation balancing, makes it suitable for differentiated instruction and allows teachers to pinpoint specific areas where students struggle. This assessment directly supports NGSS standard MS-PS1-5 (Develop and use a model to describe how the total number of atoms does not change in a chemical reaction) and provides the foundational skills students need for high school chemistry coursework.
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22 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Balance this equation:
MgCl2 --> Mg4+ Cl2
Tags
NGSS.MS-PS1-5
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Balance this equation:
2Li + Cl2 -> LiCl
Tags
NGSS.MS-PS1-5
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The substances listed on the left side of a chemical equation are the
(extra credit)
Products
Coefficients
Precipitates
Reactants
Tags
NGSS.MS-PS1-5
NGSS.MS-PS1-2
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
In chemical reactions, what does the principle of conservation of mass mean?
(extra credit)
Matter is not created or destroyed.
The total mass of the reactants is greater than the total mass of the products.
The total mass of the reactants is less than the total mass of the products.
Matter is not changed.
Tags
NGSS.MS-PS1-5
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
How many Hydrogen (H) atoms are in NH3O5
Tags
NGSS.MS-PS1-1
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Name the part in red (extra credit):
H2 + O2 -> H2O
Coefficient
Product
Yield
Subscript
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Name the part in red (extra credit):
_2_H2 + _1_O2 -> _2_H2O
Coefficient
Product
Yield
Subscript
Tags
NGSS.MS-PS1-5
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