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End-Of-Grade Practice 1
Test Description: This test is designed to review themes taught in 8th grade science aligned with the North Carolina Standard Course of Study.
Instructions: Answer all questions to get your test result.
1) All of the following are signs that a chemical change has taken place EXCEPT for:
A
substance boils.
B
gas produced.
C
heat is given off or taken in.
D
light given off.
2) Explain the difference between mixtures and compounds.
A
Mixtures and compounds undergo both physical and chemical changes.
B
There is no difference between mixtures and compounds.
C
Mixtures are the products of a chemical change; compounds are the product of physical change.
D
Mixtures are the products of a physical change; compounds are the product of chemical change.
3) This gas makes up over 65% of your body:
A
carbon
B
hydrogen
C
calcium
D
oxygen
4) A 7.0 g rock is dropped into a graduated cylinder containing 15.0 mL of water. The water level rises to 18.0. What is the volume of the rock?
A
7.0 mL
B
3.0 mL
C
18.0 mL
D
10.0 mL
5) In the periodic table, what is a group?
A
a horizontal row without similar properties
B
a vertical column with similar properties
C
a horizontal row with similar properties
D
a vertical column without similar properties
6) Oxides are compounds that always include
A
carbon
B
acids
C
halogens
D
oxygen
7) One special type of solution that is not a liquid, but a solid, includes metals such as bronze, brass, and stainless steel. These metals are called____.
A
alloys
B
universal solvents
C
atoms
D
elements
8) According to the periodic table, how many electrons does an uncharged element of oxygen have?
A
8
B
34
C
7
D
16
9) Iron and oxygen form iron oxide which is commonly called rust. Which of the following is a product in the reaction?
A
oxygen
B
iron oxide
C
water
D
iron
10) Which of the following numbers indicates an acidic pH value?
A
7
B
12
C
3
D
14
*select an answer for all questions
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