1. Which observation(s) might be used as evidence that a chemical reaction occurred?
Material properties

Quiz
•
Science
•
7th Grade
•
Medium
Sheeba 79717/TCHR/BLLC
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18 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Color change
Odor change
Properties change
All of the above
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
________ result(s) in no new substances.
A physical change
A chemical change
Physical and chemical changes
None of the above
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which is an example of a physical change?
Burning wood
Freezing water
Rust on a car
Cooking food
4.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Which is an example of a chemical change?
Burning wood
Burning wood
Burning wood
All of the above
5.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
If you start a chemical reaction with 5 atoms of helium, how many atoms will you have after?
4 atoms
10 atoms
5 atoms
1 atom
6.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Which of the following describes a precipitate?
Which of the following describes a precipitate?
a solid forms when one liquid is poured into another
a gas forms when a solid is placed in a liquid
bubbles form when an acid is poured on a rock
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Digesting your food is an example of
chemical change
physical change
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