13 Jun In the “Quicker Picker Upper” lab exercise, which of the
Question
In the “Quicker Picker Upper” lab exercise, which of the following was your independent variable?
brand of paper towel
weight of water absorbed
volume of water in pan or beaker
time
2 points
QUESTION 2
In the “Quicker Picker Upper” lab exercise which of the following best describes your dependent variable?
amount of water absorbed by the paper towel
time
thickness of paper towel
brand of paper towel
2 points
QUESTION 3
Which of the following best describes the appropriate controls for the paper towel lab exercise?
size of paper towel and the amount of water applied to each towel
size of paper towel, amount of water applied to each piece of towel, and the time allowed for each towel to absorb water
size of paper towel only
amount of water applied to each paper towel only
2 points
QUESTION 4
Which of the following would hold the most dissolved oxygen?
cold fresh water
cold salt water
warm fresh water
warm salt water
2 points
QUESTION 5
Dissolved oxygen in water can increase due to which of the following processes?
photosynthesis
water flowing rapidly
a fountain (similar to the one in library pond)
all of the above
2 points
QUESTION 6
Fecal coliform bacteria are disease causing organisms.
True
False
2 points
QUESTION 7
A solution with a pH of 4 _____________ vs. a solution with a pH of 5.
is less acidic and therefore has less hydrogen ions
is more acidic and therefore has less hydrogen ions
is less acidic and therefore has more hydrogen ions
is more acidic and therefore has more hydrogen ions
2 points
QUESTION 8
Freshwater should have a salinity of:
0-1 ppt
0-0.5 ppt
0-30 ppt
0-10 ppt
2 points
QUESTION 9
High turbidity means clearer water.
True
False
2 points
QUESTION 10
Phosphates and nitrates can both increase plant and algal growth.
True
False
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