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8th Grade Exam 2
Test Description: First semester exam review
Instructions: Answer all questions to get your test result.
1) Why are the partcles in matter always moving?
A
because they are being pushed
B
because of their mass
C
because they have energy
D
because of gravity
2) The change of state from liqid to gas is called
A
melting
B
condensation
C
evaporation
D
freezing
3) An xample of a chemical property is
A
boiling point
B
density
C
volume
D
flammability
4) The chemical changes that occur during photosnythesis
A
obey the law of conservation and mass
B
are not effected by the law of conservation and mass
C
are an exception to the law of conservation and mass
D
cause new matter to be created
5) The particles known as the bilding blocks of matter are
A
molecules
B
compounds
C
atoms
D
elements
6) Evaporation is what occus when
A
a gas becomes a liquid
B
a liquid becomes a gas
C
a gas becomes a plasma
D
a solid becomes a liquid
7) Less helium would be needed to fill a balloon on a(n)
A
hot day
B
cold day
C
humid day
D
rainy day
8) The smallest paricle into which an element can be divided and still be the same substance is called
A
atom
B
electron
C
nucleus
D
neutron
9) How would you describe the nucleus?
A
dense, positively charged
B
dense, negatively charged
C
large, positively charged
D
tiny, negatively charged
10) An atom of gold with 79 protons, 79 electrons, 18neutrons would have a mass number of
A
276
B
197
C
158
D
39
*select an answer for all questions
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