Evidence of Chemical Reactions
Authored by David Schwoebel
Science
9th Grade
NGSS covered
Used 14+ times
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11 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is a chemical reaction?
A chemical reaction is a change in state
A chemical reaction is a biological process
A chemical reaction is a physical change
A chemical reaction is a process that leads to the transformation of one set of chemical substances to another.
Tags
NGSS.MS-PS1-5
NGSS.MS-PS1-2
NGSS.MS-PS1-1
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What are some common signs that a chemical reaction has occurred?
Color change, gas production, formation of a precipitate, temperature change, and odor change.
Change in volume
Change in texture
Formation of bubbles
Change in pressure
Tags
NGSS.MS-PS1-2
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Explain the difference between physical and chemical changes.
Physical changes involve a change in color, while chemical changes do not.
Physical changes are reversible, while chemical changes are irreversible.
Physical changes do not alter the chemical composition of a substance, while chemical changes result in the formation of new substances.
Physical changes result in new substances, while chemical changes do not alter the chemical composition of a substance.
Tags
NGSS.MS-PS1-4
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Give an example of a chemical reaction that produces a gas.
Iron + Sulfur -> Nitrogen gas
Sugar + Lemon juice -> Hydrogen gas
Salt + Water -> Oxygen gas
Baking soda + Vinegar -> Carbon dioxide gas
Tags
NGSS.MS-PS1-5
NGSS.MS-PS1-2
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is a precipitate and how does it indicate a chemical reaction?
A precipitate is a liquid that forms when two solutions react chemically.
A precipitate is a gas that forms when two solutions react chemically.
A precipitate is a solid that forms when two solutions react chemically. It indicates a chemical reaction because the formation of a precipitate is evidence that a chemical change has occurred.
A precipitate is a solution that forms when two solids react chemically.
Tags
NGSS.MS-PS1-5
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is it important to balance chemical equations?
To make the equations longer
To confuse students
To waste time
To ensure the law of conservation of mass is obeyed.
Tags
NGSS.MS-PS1-5
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the law of conservation of mass and how does it relate to chemical reactions?
The law of conservation of mass is only relevant in physics, not chemistry
The law of conservation of mass states that mass can be created or destroyed in chemical reactions
The law of conservation of mass is a fundamental principle in chemistry that states mass is conserved in chemical reactions.
The law of conservation of mass only applies to solid substances
Tags
NGSS.MS-PS1-5
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