Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.


1.

How
many significant digits are there in the following number: 15.30 g


2.

How
many significant digits are in the following number: 1000 lbs


3.

How
many significant digits are in the following number: 0.00032 m


4.

How
many significant digits are in the following number: 1.67 x 10^{2} m


5.

Express the following number in ordinary notation : 5.99 x
10^{3} a.  599  c.  5990  b.  0.599  d.  0.00599     


6.

Perform the following calculation. Place your answer in the correct number of
significant digits and in the correct unit : 15.996 g  5.72 g a.  10.28
g  c.  10.3
g^{2}  b.  10.275 g  d.  10.3 g     


7.

Perform the following calculation. Place your answer in the correct number of
significant digits and in the correct unit : (2.65 ´ 10^{6}) + (3.97 ´
10^{5}) a.  3.047 x 10^{6}  c.  3047000  b.  3.05 x
10^{6}  d.  3.047 x
10^{6}     


8.

Perform the following calculation. Place your answer in the correct number of
significant digits and in the correct unit : (5.26 ´ 10^{–8}) ´ (8.3
´
10^{–3}) a.  4.37 x 10^{9}  c.  4.37 x 10^{14}  b.  4.4 x
10^{9}  d.  4.4 x
10^{14}     


9.

Perform the following calculation. Place your answer in the correct number of
significant digits and in the correct unit : 145.00 g / 120 mL a.  1.2
g/ml  c.  1
g/ml  b.  1.21
g/ml  d.  1.208
g/ml     


10.

Claculate the number of kilometers in 3.69 m a.  0.0369
km  c.  3690
km  b.  0.00369
km  d.  369
km     


11.

How
many seconds are in 22 days? a.  15840 sec  c.  31680 sec  b.  1.9 x
10^{6}sec  d.  528
sec     


12.

Convert 100 nm into mm a.  0.0001 mm  c.  1 x 10^{7}mm  b.  1 x
10^{8}mm  d.  1 x
10^{10}mm     


13.

Convert 40.0ºC to Kelvin a.  175 K  c.  215 K  b.  313
K  d.  233
K     


14.

Ethyl
aclohol boils at 78.5 ºC. Convert this to Fahrenheit. a.  109
ºF  c.  173
ºF  b.  25.9 ºF  d.  199 ºF     


15.

You
have a 55.0 g sample of ethanol. If the density of ethanol is 0.7893 g/ml, what volume of ethanol do
you have? a.  69.7
mL  c.  43.4
mL  b.  0.0144
mL  d.  10.6
mL     


16.

A
piece of metal with a mass of 38.5 g is placed in a 50.0 mL graduated cylinder. The water level rises
from 20.0 mL to 35.5 mL. What is the density of the metal? a.  0.770
g/ml  c.  1.93
g/ml  b.  0.922 g/
ml  d.  1.19
g/ml     


17.

To
determine density, the quantities that must be measured are a.  mass and
weight.  c.  volume and
concentration.  b.  volume and weight.  d.  volume and mass.     


18.

If
some measurements agree closely with each other but differ widely from the actual value, these
measurements are a.  neither precise
nor accurate  c.  accurate, but
not precise.  b.  acceptable as a new standard of
accuracy.  d.  precise, but not
accurate.     


19.

Expressed in scientific notation, 0.0930 m is a.  93 x
10^{3} m.  c.  9.30 x
10^{2} m.  b.  9.3 x 10^{3} m.  d.  9.30 x 10^{4} m.     


20.

A standard
for comparison that helps to ensure that the experimental result is caused by the condition being
tested is the ____. a.  constant  c.  dependant variable  b.  control  d.  hypothesis     


21.

An
object has a mass of 48 kilograms on Earth. What is this object’s mass on the moon? (The
gravitational pull on the moon is1/6 that of the gravitational pull on Earth.) a.  48
kilograms  c.  8
pounds  b.  48 pounds  d.  8 kilograms     


22.

A
biologist is studying how earthworms behave in response to moisture. Which of the following is the
dependent variable in this experiment? a.  the earthworm’s behavior  c.  the temperature of the room  b.  the amount of
moisture  d.  the
earthworm     


23.

A
means of expressing numbers as a multiple of two factors: a number between 1 and 10; and ten raised
to a power, or exponent a.  base unit  c.  dimensional analysis  b.  derived
unit  d.  scientific
notation     


24.

You
calculate that 139 000 000 m is the answer to a problem. You are asked to write your answer in
scientific notation. Which answer is correct? a.  1.39 x 10^{8}  c.  14 x 10^{10}  b.  13.9 x
10^{10}  d.  1.4 x
10^{8}     


25.

Refers to how close a measured value is to an accepted value a.  percision  c.  derived
unit  b.  accuracy  d.  dimensional
analysis     
