Question

toxic tides review packet / study guide

1. identify each of the following being qualitative (1) or quantitative (2)

a._____ the stop sign is red and white
b._____ acids taste sour
c._____ seawaters ph has dropped from 8.23 to 8.14 in the last 250 years
d._____ the oceans water is becoming more acidic
e._____ the oceans concentration of hydrogen ions (h^+) has increased 30% in the last 250 ye
f._____ carbon dioxide is colorless
g._____ a molecule of carbon dioxide has a molecular mass of 44.00 amu
h._____ sunrise is getting earlier every day
i._____ i am going to study for at least 2 hours for the exam
j._____ mods 1,2 and 3 are shorter on early dismissal days

Explanation:

• Qualitative data describes qualities or characteristics. It is non - numerical.
• Quantitative data is numerical data that can be measured.

a.

The statement "The stop sign is Red and White" describes a quality (color), so it is qualitative.

b.

"Acids taste sour" describes a quality (taste), so it is qualitative.

c.

"Seawater's pH has dropped from 8.23 to 8.14 in the last 250 years" has numerical values (pH values), so it is quantitative.

d.

"The Ocean’s water is becoming more acidic" describes a quality (acidity level in a non - numerical, descriptive way), so it is qualitative.

e.

"The Ocean’s concentration of hydrogen ions (\(H^{+}\)) has increased 30% in the last 250 years" has a numerical value (30%), so it is quantitative.

f.

"Carbon dioxide is colorless" describes a quality (color), so it is qualitative.

g.

"A molecule of carbon dioxide has a molecular mass of 44.00 amu" has a numerical value (44.00 amu), so it is quantitative.

h.

"Sunrise is getting earlier every day" is a non - numerical description (earlier is a relative, non - measured term in this context), so it is qualitative.

i.

"I am going to study for at least 2 hours for the exam" has a numerical value (2 hours), so it is quantitative.

j.

"MODS 1,2 and 3 are shorter on early dismissal days" is a non - numerical description (shorter is relative and not measured numerically here), so it is qualitative.

Answer:

a. 1
b. 1
c. 2
d. 1
e. 2
f. 1
g. 2
h. 1
i. 2
j. 1