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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 properties
B
chemical changes
C
chemical properties
D
physical changes
2) Which of the following is NOT a rule for recognizing a PHYSICAL change?
A
change in size
B
color change
C
change in state of matter
D
change in shape
3) Which of the following is NOT a rule for recognizing a CHEMICAL change?
A
change in state of matter
B
temperature change
C
color change
D
formation of a precipitate or gas
4) What type of changes DO NOT change the identity of the substance?
A
chemical property
B
physical property
C
chemical change
D
physical change
5) What changes the identity of substances (when mixed together)?
A
chemical change
B
physical change
C
chemical property
D
physical property
6) What the solid formed when two or more liquids are mixed together?
A
liquid
B
precipitate
C
gas
D
mixture
7) Which of the following is an element?
A
water
B
iron and sand
C
oxygen
D
milk
8) Which of the following is a compound?
A
carbon dioxide
B
hydrogen
C
salt and pepper
D
Kool Aid
9) What is the chemical symbol for Iron?
A
N
B
Na
C
I
D
Fe
10) What is the chemical formula for salt?
A
C6H12O6 (all numbers should be subscripts)
B
NaCl (all numbers should be subscripts)
C
CO2 (all numbers should be subscripts)
D
H2O (all numbers should be subscripts)
*select an answer for all questions
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