Conservation of Mass
Passage
•
Science
•
6th - 8th Grade
•
Hard
Lawrence Garza
FREE Resource
6 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does the law of conservation of mass state?
Mass can be created or destroyed.
Mass remains constant in a closed system.
Mass can change forms but not quantity.
Mass increases during chemical reactions.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the example of burning wood, what does the total mass of the reactants equal?
The mass of the wood only.
The mass of the carbon dioxide and water vapor only.
The mass of the carbon dioxide, water vapor, and ash.
The mass of the oxygen only.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens to the mass of hydrogen and oxygen when they combine to form water?
The mass decreases.
The mass increases.
The mass remains the same.
The mass doubles.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is the law of conservation of mass important in chemistry?
It helps in balancing chemical equations.
It allows the creation of new matter.
It explains why mass disappears during reactions.
It predicts the destruction of matter.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is an example of the law of conservation of mass in action?
Burning wood and measuring the mass of ash only.
Combining hydrogen and oxygen to form water.
Creating new matter during a chemical reaction.
Destroying matter in a closed system.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which statement best explains how the law of conservation of mass applies to the chemical equation below?
2H2+O2→2H2O
Mass is created because a new substance, water, is formed.
The total number of atoms on the product side is greater than on the reactant side.
The same number of each type of atom is present before and after the reaction, just rearranged.
Oxygen atoms disappear as hydrogen atoms bond together.
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