Law of Conservation of Mass
Authored by Michele Baskin
Science, Chemistry
10th - 11th Grade
NGSS covered
Used 343+ times
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About
Looking at this quiz, I can see it focuses squarely on the Law of Conservation of Mass, a fundamental principle in chemistry that's typically introduced at the high school level. The questions progress systematically from basic conceptual understanding to more complex applications involving chemical equations and real-world scenarios. Students need to grasp that mass cannot be created or destroyed in chemical reactions, only transformed from reactants to products. The mathematical component requires students to set up simple algebraic equations where the total mass of reactants equals the total mass of products, then solve for unknown quantities. More sophisticated questions challenge students to recognize that apparent mass changes in reactions like rusting or burning occur because gases enter or leave the system, and the conservation law still holds when all substances are accounted for. This content aligns perfectly with 10th-11th grade chemistry curricula where students develop quantitative reasoning skills alongside conceptual understanding of chemical processes. Created by Michele Baskin, a Science teacher in the US who teaches grades 10-11. This quiz serves as an excellent tool for introducing and reinforcing one of chemistry's most important principles through a variety of question formats that build from simple recall to complex application. Teachers can use this as a formative assessment after initial instruction on conservation of mass, or as a review activity before unit tests or standardized assessments. The progression from basic definitions to calculation problems to real-world scenarios like melting ice and burning candles makes it ideal for homework assignments that help students connect classroom learning to everyday observations. The quiz effectively supports instruction by requiring students to demonstrate both conceptual understanding and mathematical problem-solving skills, making it valuable for identifying misconceptions early in the learning process. This content directly aligns with standards NGSS HS-PS1-7 and corresponding state chemistry standards that emphasize using mathematical representations to support the claim that atoms are conserved during chemical reactions.
Content View
Student View
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
2 mins • 12 pts
What is the Law of Conservation of mass?
Tags
NGSS.MS-PS1-5
NGSS.MS-PS1-2
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
In a reaction A + B ----> C, reactant A has 5g and product C has 9g. How many grams does reactant B should have?
Tags
NGSS.MS-PS1-5
NGSS.MS-PS1-2
3.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Matter can not be created nor destroyed: it can only be
Tags
NGSS.MS-PS1-5
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
If a reaction starts with a total 75g of reactants it should produce
Tags
NGSS.MS-PS1-5
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
In the reaction AB-----> A + B reactant AB has 12g and product B has 5g. How many grams should product A have?
Tags
NGSS.MS-PS1-5
NGSS.MS-PS1-2
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Bob puts 200 grams of ice into a pitcher with 900 grams of water. He gets distracted and comes back later to find that the ice has melted in the water. How many grams of water does Bob now have in the pitcher?
Tags
NGSS.MS-PS1-5
NGSS.MS-PS1-4
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
The Law of Conservation of Mass states that mass is neither created nor destroyed in an ordinary chemical reaction. When an iron nail rusts, it seems to get heavier in mass. Does the iron nail follow the Law of Conservation of Mass?
No, rusting is an exception to the Law of Conservation of Mass.
No, since rusting is a chemical change it does not follow the Law of Conservation of Mass.
Yes, the iron rearranges its protons so that the masses are the same before and after the reaction and rusting follows the Law of Conservation of Mass.
Yes, iron chemically combines with the oxygen in the air so if you add the oxygen into the mass of the chemicals before the reaction, the mass after the reaction is the same.
Tags
NGSS.MS-PS1-5
NGSS.MS-PS1-2
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