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Mid-Term Review 8th Grade Physical Science 5
Test Description: Use this to help you study for the Mid-Term Exam.
Instructions: Answer all questions to get your test result.
1) If you are averaging 3.3, 4.75, and 2.002, what will the answer be with correct sig figs?
A
3.4
B
3.351
C
3.3507
D
3.35
2) The atomic number of an atom is calculated by adding up its
A
electrons, neutrons and protons
B
neutrons and protons
C
protons only
D
electrons and neutrons
3) How does a compound differ from a mixture?
A
The composition of a mixture cannot vary, compounds can.
B
A compound has a fixed ratio, while mixtures aren't fixed.
C
Compounds can be separated physically, mixtures can't.
D
A compound cannot be broken down into simpler substances.
4) A positively charged particle found in the nucleus of an atom is known as a
A
ion
B
neutron
C
proton
D
electron
5) How many sig figs in 300,000,000?
A
8
B
1
C
9
D
3
6) An electron located in the outer shell of an atom is called a(n)
A
isotope
B
ion
C
neutron
D
valence electron
7) Which of the following is a physical change?
A
wood burning
B
ice melting
C
fireworks exploding
D
banana rotting
8) What is the difference between a chemical property and physical property?
A
Physical Properties are determined by a substance’s composition,while Chemical Properties aren't.
B
Chemical Properties vary according to sample size, while Physical Properties never vary.
C
Physical Properties can be identified without changing composition, while Chemical Properties can't.
D
Chemical Properties are useful for identifying substances, but Physical Properties are not.
9) What is the difference between mass and volume?
A
Volume varies with amount of substance but mass does not.
B
Mass varies with amount of a substance, but volume does not.
C
Mass is amount of matter, volume is the space it takes up.
D
Volume is weight, mass is how much space it takes up.
10) How many sig figs in 0.00086?
A
1
B
2
C
5
D
6
*select an answer for all questions
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