BIO 121 Lab Final Exam Questions With All
Correct Answers
which of the following is NOT one of the fundamental characteristics of science? Correct answer-it
involves a search for irregularities
a useful hypothesis is Correct answer-a testable statement
the scientific method includes all of the following EXCEPT Correct answer-theories
in an experiment, which of the following variables is used as baseline for comparison? Correct
answer-control
a theory is... Correct answer-an idea on which experts in the field agree
in a typical solution, the ________ is the dissolving medium and the ________ is the substance
dissolved. Correct answer-solvent, solute
the function of a hypothesis is to ________ Correct answer-provide direction for gathering data
after completing a controlled experiment, a scientist changes the dosage of an antibiotic and repeats
the experiment. The change in dosage is the _________ Correct answer-independent variable
scientific notation is a way of expressing __________ Correct answer-extremely small and large
numbers and even those that have many zeros
for the number 6.8 x 10^7, the 7 is called the Correct answer-exponent
k
h
d
(g,l,m)
d
c
m Correct answer-1,000
100
10
1
.1
.01
.001
the metric prefix "kilo" means Correct answer-thousand
what is the symbol for centimeter? Correct answer-cm
how many millimeters are in 1 centimeter Correct answer-10
when multiplying numbers written in scientific notation, you should _______ the exponents.
Correct answer-add
, what is the number 4.85 x 10^5 in standard notation Correct answer-485,000
which of the following instruments is used in the laboratory to distribute and extract precise
amounts of liquids Correct answer-pipette
what is the total magnification of the ocular lenses? Correct answer-scanning - 4x (10x)= 40x
low-power - 10x (10x)= 100x
high-power - 40x (10x)= 400x
what is the approximate magnification of the low-power objective? Correct answer-10x
The microscope platform upon which specimen slides are placed is called the ________. Correct
answer-stage
the distance between the objective lens and the specimen is called the _________ distance
Correct answer-working
to change the amount of light entering the objective lens, you would adjust the ________ Correct
answer-iris diaphragm
while looking at a specimen under a microscope, you move the slide to the right. In which direction
does the image move? Correct answer-to the left
when using the _______ objective, you would use the coarse-adjustment knob to bring the specimen
into focus Correct answer-low-power
which objective would you use to search for a specimen? Correct answer-scanning
you are looking at a specimen through a high-power objective with a magnification of 45x, and the
ocular has a magnification of 10x. What is the total magnification? Correct answer-450x
you are looking at a specimen under low power, and you switch to the high-power objective. Which
of the following happens? Correct answer-the amount of light decreases
chemistry is the study of the _________ of matter Correct answer-properties, interaction, and
composition and structure
you dissolve a teaspoon of sugar in water. the sugar is called the ________ Correct answer-solute
what is the range of the pH scale? Correct answer-0-14
which type of chemical bond results from the equal sharing of electrons? Correct answer-nonpolar
covalent bonds
a solution with a pH of _______ is considered neutral Correct answer-7
which of the following has the lowest pH Correct answer-stomach acid
bases have which of the following characteristics? Correct answer-release OH- in solution or
decrease the H+ concentration
Correct Answers
which of the following is NOT one of the fundamental characteristics of science? Correct answer-it
involves a search for irregularities
a useful hypothesis is Correct answer-a testable statement
the scientific method includes all of the following EXCEPT Correct answer-theories
in an experiment, which of the following variables is used as baseline for comparison? Correct
answer-control
a theory is... Correct answer-an idea on which experts in the field agree
in a typical solution, the ________ is the dissolving medium and the ________ is the substance
dissolved. Correct answer-solvent, solute
the function of a hypothesis is to ________ Correct answer-provide direction for gathering data
after completing a controlled experiment, a scientist changes the dosage of an antibiotic and repeats
the experiment. The change in dosage is the _________ Correct answer-independent variable
scientific notation is a way of expressing __________ Correct answer-extremely small and large
numbers and even those that have many zeros
for the number 6.8 x 10^7, the 7 is called the Correct answer-exponent
k
h
d
(g,l,m)
d
c
m Correct answer-1,000
100
10
1
.1
.01
.001
the metric prefix "kilo" means Correct answer-thousand
what is the symbol for centimeter? Correct answer-cm
how many millimeters are in 1 centimeter Correct answer-10
when multiplying numbers written in scientific notation, you should _______ the exponents.
Correct answer-add
, what is the number 4.85 x 10^5 in standard notation Correct answer-485,000
which of the following instruments is used in the laboratory to distribute and extract precise
amounts of liquids Correct answer-pipette
what is the total magnification of the ocular lenses? Correct answer-scanning - 4x (10x)= 40x
low-power - 10x (10x)= 100x
high-power - 40x (10x)= 400x
what is the approximate magnification of the low-power objective? Correct answer-10x
The microscope platform upon which specimen slides are placed is called the ________. Correct
answer-stage
the distance between the objective lens and the specimen is called the _________ distance
Correct answer-working
to change the amount of light entering the objective lens, you would adjust the ________ Correct
answer-iris diaphragm
while looking at a specimen under a microscope, you move the slide to the right. In which direction
does the image move? Correct answer-to the left
when using the _______ objective, you would use the coarse-adjustment knob to bring the specimen
into focus Correct answer-low-power
which objective would you use to search for a specimen? Correct answer-scanning
you are looking at a specimen through a high-power objective with a magnification of 45x, and the
ocular has a magnification of 10x. What is the total magnification? Correct answer-450x
you are looking at a specimen under low power, and you switch to the high-power objective. Which
of the following happens? Correct answer-the amount of light decreases
chemistry is the study of the _________ of matter Correct answer-properties, interaction, and
composition and structure
you dissolve a teaspoon of sugar in water. the sugar is called the ________ Correct answer-solute
what is the range of the pH scale? Correct answer-0-14
which type of chemical bond results from the equal sharing of electrons? Correct answer-nonpolar
covalent bonds
a solution with a pH of _______ is considered neutral Correct answer-7
which of the following has the lowest pH Correct answer-stomach acid
bases have which of the following characteristics? Correct answer-release OH- in solution or
decrease the H+ concentration
