1. Which of these is not an accurate unit
2. Four immiscible liquids are mixed and
form four layers. From top to bottom what will be observed?
a) corn oil, carbon tetrachloride, water, mercury
b) carbon tetrachloride, corn oil, water, mercury
c) corn oil, water, carbon tetrachloride, mercury
d) corn oil, water, mercury, carbon tetrachloride
An 8 oz. empty glass is filled with ice. It has a mass of 254 grams. After the
ice melts the total mass would be
a) approximately 260 grams
b) 254 grams
c) approximately 250 grams
d) much greater than 260 grams
4. A volume of 50
cu.cm. of dry sand is added to 30 cu. cm. of water for a total volume of 60 cu
cm. What is the volume of water that goes into the air spaces?
60 cu. cm,
10 cu. cm.
20 cu. cm.
5. A large piece of rock salt is added to a test
tube containing water. The level of water is marked and the test tube is sealed.
After all the rock salt dissolves it is noted that the level of liquid is below
the original marked level. What conclusion(s) can we draw from this experiment?
1) The mass of the system has decreased. 2) When salt
is added to water a chemical change occurs 3) The density of salt water is
greater than the density of pure water 4) the volume of the system has decreased
as a result of a physical change. a)
1 only is true b)
2 and 3 are true c)
3 and 4 are true d)
1,2, and 3 are true
6. When the space shuttle circles
the earth objects within the ship become weightless. The most likely reason for
this is because
a) The shuttle is actually falling back to earth while circling the earth, so
all objects within the ship are in free-fall.
b) The shuttle is so far away from earth that the effect of gravity is neglible.
is no air
d) none of the above
7. Liquid water is more dense than
a) A liquid H 20 molecule has more mass than an ice H 20
b) A chemical change occurs when ice melts that causes the mass of water to increase
ice melts there is an increase in the amount of water molecules
d) there are a greater number of H 20 molecule per unit of volume in
liquid water than ice.
8. The density of water in SI units
(International System of Units) is:
a) 1 pound/cu. ft
b) 1000 g/1000 ml.
c) 1 kg/L
d) 1 g/cm3
9. A graduated cylinder is filled with 50cc. of
water. A glass stopper is dropped into the graduated cylinder. The volume now
reads 65.4 cc. If we know glass has a density of 2.5 g/cm3, what would we expect
the mass of the stopper to be closest to?
a) 38.5 grams
b) 20 grams
c) 26.7 grams
d) 42 grams
10. The specific gravity of a substance is the
ratio of the mass of a substance to the mass of an equal volume of water. What
is the specific gravity of glass?
a) 2.5 grams
d) 2.0 grams
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