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