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