Bisc 160 Reading Quizzes and Homework Questions || with
Complete Solution.
A researcher collected frog and water samples from eight widely separated sites across the
United States and studied the incidence of abnormalities in frogs exposed to different levels of
the herbicide atrazine. This was a(n) _______________________ experiment.
a. logic
b. controlled
c. deductive
d. comparative
e. inductive correct answers d. comparative
Which is a reason to use the statistics to evaluate data?
a. it accounts for variation in scientific measurements
b. it provides a way for proving that your hypothesis is correct
c. it enables you to predict experimental results
d. it facilitates the exclusion of data that do not fit your hypothesis
e. it makes it possible to avoid having to consider the null hypothesis correct answers a. it
accounts for variation in scientific measurements
Which is a characteristic of a comparative experiment?
a. it starts with the prediction that there will be a difference between groups or samples.
b. one variable is compared to all the other variables
c. only one variable is manipulated
d. all variables are kept constant
, e. it starts with groups or samples that are as similar as possible correct answers a. it starts with
the prediction that there will be a difference between groups or samples.
Polar molecules
a. have bonds with an overall positive charge
b. have the ability to form ions when dissolved in water
c. have bonds with an overall negative charge
d. have electrical charges that are equally distributed
e. have electrical charges that are unequally distributed correct answers e. have electrical charges
that are unequally distributed
Which interaction between atoms is the strongest?
a. covalent bonds
b. ionic attraction
c. van der Waals forces
d. hydrogen bonds
e. hydrophobic interactions correct answers a. covalent bonds
An atom of an element contains 12 protons. How many electrons must it contain?
a. 6
b. 12
c. 24
d. 8
e. it is impossible to determine from the information correct answers b. 12
Complete Solution.
A researcher collected frog and water samples from eight widely separated sites across the
United States and studied the incidence of abnormalities in frogs exposed to different levels of
the herbicide atrazine. This was a(n) _______________________ experiment.
a. logic
b. controlled
c. deductive
d. comparative
e. inductive correct answers d. comparative
Which is a reason to use the statistics to evaluate data?
a. it accounts for variation in scientific measurements
b. it provides a way for proving that your hypothesis is correct
c. it enables you to predict experimental results
d. it facilitates the exclusion of data that do not fit your hypothesis
e. it makes it possible to avoid having to consider the null hypothesis correct answers a. it
accounts for variation in scientific measurements
Which is a characteristic of a comparative experiment?
a. it starts with the prediction that there will be a difference between groups or samples.
b. one variable is compared to all the other variables
c. only one variable is manipulated
d. all variables are kept constant
, e. it starts with groups or samples that are as similar as possible correct answers a. it starts with
the prediction that there will be a difference between groups or samples.
Polar molecules
a. have bonds with an overall positive charge
b. have the ability to form ions when dissolved in water
c. have bonds with an overall negative charge
d. have electrical charges that are equally distributed
e. have electrical charges that are unequally distributed correct answers e. have electrical charges
that are unequally distributed
Which interaction between atoms is the strongest?
a. covalent bonds
b. ionic attraction
c. van der Waals forces
d. hydrogen bonds
e. hydrophobic interactions correct answers a. covalent bonds
An atom of an element contains 12 protons. How many electrons must it contain?
a. 6
b. 12
c. 24
d. 8
e. it is impossible to determine from the information correct answers b. 12
