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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 of gravity
D
because they have energy
2) The change of state from liqid to gas is called
A
evaporation
B
freezing
C
condensation
D
melting
3) An xample of a chemical property is
A
flammability
B
volume
C
density
D
boiling point
4) The chemical changes that occur during photosnythesis
A
are not effected by the law of conservation and mass
B
cause new matter to be created
C
obey the law of conservation and mass
D
are an exception to the law of conservation and mass
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 solid becomes a liquid
B
a gas becomes a liquid
C
a liquid becomes a gas
D
a gas becomes a plasma
7) Less helium would be needed to fill a balloon on a(n)
A
cold day
B
humid day
C
rainy day
D
hot day
8) The smallest paricle into which an element can be divided and still be the same substance is called
A
nucleus
B
electron
C
neutron
D
atom
9) How would you describe the nucleus?
A
dense, positively charged
B
dense, negatively charged
C
tiny, negatively charged
D
large, positively charged
10) An atom of gold with 79 protons, 79 electrons, 18neutrons would have a mass number of
A
197
B
158
C
276
D
39
*select an answer for all questions
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