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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
3.35
B
3.4
C
3.351
D
3.3507
2) The atomic number of an atom is calculated by adding up its
A
electrons, neutrons and protons
B
electrons and neutrons
C
protons only
D
neutrons and protons
3) How does a compound differ from a mixture?
A
A compound has a fixed ratio, while mixtures aren't fixed.
B
A compound cannot be broken down into simpler substances.
C
The composition of a mixture cannot vary, compounds can.
D
Compounds can be separated physically, mixtures can't.
4) A positively charged particle found in the nucleus of an atom is known as a
A
electron
B
neutron
C
proton
D
ion
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
valence electron
C
neutron
D
ion
7) Which of the following is a physical change?
A
fireworks exploding
B
wood burning
C
ice melting
D
banana rotting
8) What is the difference between a chemical property and physical property?
A
Chemical Properties vary according to sample size, while Physical Properties never vary.
B
Physical Properties can be identified without changing composition, while Chemical Properties can't.
C
Chemical Properties are useful for identifying substances, but Physical Properties are not.
D
Physical Properties are determined by a substance’s composition,while Chemical Properties aren't.
9) What is the difference between mass and volume?
A
Volume is weight, mass is how much space it takes up.
B
Mass is amount of matter, volume is the space it takes up.
C
Volume varies with amount of substance but mass does not.
D
Mass varies with amount of a substance, but volume does not.
10) How many sig figs in 0.00086?
A
2
B
6
C
1
D
5
*select an answer for all questions
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