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PASS Chem 4 Review
Test Description: Physical and Chemical reactions etc. SC 7th grade Chem standard
Instructions: Answer all questions to get your test result.
1) Properties that are not always visible, can be recognized only when substances react chemically with one another.
A
physical changes
B
chemical changes
C
physical properties
D
chemical properties
2) Which of the following is NOT a rule for recognizing a PHYSICAL change?
A
change in state of matter
B
color change
C
change in size
D
change in shape
3) Which of the following is NOT a rule for recognizing a CHEMICAL change?
A
color change
B
change in state of matter
C
formation of a precipitate or gas
D
temperature change
4) What type of changes DO NOT change the identity of the substance?
A
chemical property
B
physical change
C
physical property
D
chemical change
5) What changes the identity of substances (when mixed together)?
A
chemical change
B
physical change
C
physical property
D
chemical property
6) What the solid formed when two or more liquids are mixed together?
A
mixture
B
gas
C
liquid
D
precipitate
7) Which of the following is an element?
A
oxygen
B
iron and sand
C
water
D
milk
8) Which of the following is a compound?
A
salt and pepper
B
hydrogen
C
Kool Aid
D
carbon dioxide
9) What is the chemical symbol for Iron?
A
Fe
B
Na
C
N
D
I
10) What is the chemical formula for salt?
A
CO2 (all numbers should be subscripts)
B
H2O (all numbers should be subscripts)
C
NaCl (all numbers should be subscripts)
D
C6H12O6 (all numbers should be subscripts)
*select an answer for all questions
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