EARTH SCIENCE CH. 2 REVIEW Question Preview (ID: 38926)
CHAPTER 2 REVIEW.
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Chemical symbols are shorthand for
a) molecules
b) compounds
c) the name of the element
d) chemical formulas
In what form are most elements at room temperature?
a) liquid
b) solid
c) gas
d) chemical
How many known elements are there currently?
a) 115
b) 100
c) 120
d) 118
The smallest part of a substance that has all the properties of that substance is called
a) a compound
b) an atom
c) a molecule
d) an element
About 3/4 of Earth's crust is made up of oxygen and
a) potassium
b) silicon
c) iron
d) calcium
Subscrips are written
a) in Spanish
b) slightly above the line
c) in scientific notation
d) slightly below the line
A chemical symbol stands for one _______________ of an element.
a) molecule
b) atom
c) formula
d) compound
Water is H2O. How many hydrogen atoms are in water?
a) one
b) two
c) three
d) none
How does a molecule of carbon monoxide differ from a molecule of carbon dioxide?
a) different number of carbon atoms
b) different number of hydrogen atoms
c) different number of oxygen atoms
d) one is a solid, the other is a gas
Quartz, SIO2 is made up mostly of oxygen and _____________
a) silver
b) sodium
c) silicon
d) calcite
Gold is both an element and a ___________________
a) particle
b) compound
c) mineral
d) gas
How a mineral's surface reflects light is called _________________
a) streak
b) hardness
c) luster
d) color
Calcite, CaCO3, has _____________ atom(s) of calcium for every three atoms oxygen.
a) one
b) two
c) three
d) four
What property allows one mineral to scratch another
a) streak
b) luster
c) color
d) hardness
The amount of matter in a given volume is called
a) mass
b) compound
c) density
d) element
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