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1st Term Exam Review Pt. 2 - 7th Grade - 2010
Test Description: Practice questions for 1st 9weeks exam
Instructions: Answer all questions to get your test result.
1) Normal rainfall is slightly acidic, which means its pH must be
A
betwen 5 and 7
B
between 7 and 9
C
between 2 and 4
D
less than 2
2) One example of a chemical change is
A
boiling water
B
crushing a can
C
burning paper
D
melting butter
3) Substances that CANNOT be broken down chemically into other substances are
A
elements
B
solutions
C
compounds
D
mixtures
4) The density of a block of wood with a volume of 50 cubic centimeters and a mass of 100 grams is
A
5,000 g/cm3
B
0.5 g/cm3
C
500 g/cm3
D
2 g/cm3
5) Which of the following is NOT an example of a chemical change?
A
gas burning on a stove
B
ice melting in a glass of water
C
rust forming on an iron fence
D
using electricity to break down water into hydrogen and oxygen
6) The elements in a column of the periodic table
A
are in the same period
B
have the same atomic mass
C
have very similar chemical symbols
D
have similar properties
7) Which group contains the most elements?
A
metalloids
B
nonmetals
C
metals
D
transition elements
8) A neutral solution has a pH of
A
3
B
7
C
9
D
5
9) Which particles in atoms have a negative electric charge?
A
neutrons
B
nuclei
C
protons
D
electrons
10) The nucleus of an atom has a positive charge because the nucleus contains
A
electrons
B
mass
C
protons
D
neutrons
*select an answer for all questions
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