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EARTH SCIENCE CH. 2 REVIEW
Test Description: CHAPTER 2 REVIEW
Instructions: Answer all questions to get your test result.
1) Chemical symbols are shorthand for
A
molecules
B
chemical formulas
C
the name of the element
D
compounds
2) In what form are most elements at room temperature?
A
chemical
B
solid
C
gas
D
liquid
3) How many known elements are there currently?
A
120
B
100
C
118
D
115
4) The smallest part of a substance that has all the properties of that substance is called
A
a compound
B
an element
C
a molecule
D
an atom
5) About 3/4 of Earth's crust is made up of oxygen and
A
potassium
B
iron
C
silicon
D
calcium
6) Subscrips are written
A
slightly above the line
B
in scientific notation
C
in Spanish
D
slightly below the line
7) A chemical symbol stands for one _______________ of an element.
A
molecule
B
atom
C
compound
D
formula
8) Water is H2O. How many hydrogen atoms are in water?
A
none
B
one
C
three
D
two
9) How does a molecule of carbon monoxide differ from a molecule of carbon dioxide?
A
different number of hydrogen atoms
B
different number of carbon atoms
C
different number of oxygen atoms
D
one is a solid, the other is a gas
10) Quartz, SIO2 is made up mostly of oxygen and _____________
A
silver
B
silicon
C
calcite
D
sodium
11) Gold is both an element and a ___________________
A
gas
B
particle
C
compound
D
mineral
12) How a mineral's surface reflects light is called _________________
A
color
B
hardness
C
streak
D
luster
13) Calcite, CaCO3, has _____________ atom(s) of calcium for every three atoms oxygen.
A
two
B
three
C
one
D
four
14) What property allows one mineral to scratch another
A
hardness
B
color
C
streak
D
luster
15) The amount of matter in a given volume is called
A
mass
B
element
C
compound
D
density
*select an answer for all questions
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