Solved by a verified expert:Exercise 1: Data
Interpretation
Dissolved
oxygen is oxygen that is trapped in a fluid, such as water. Since many living
organism requires oxygen to survive, it is a necessary component of water
systems such as streams, lakes and rivers in order to support aquatic life. The
dissolved oxygen is measured in units of ppm (parts per million). Examine the
data in Table 2 showing the amount of dissolved oxygen present and the number
of fish observed in the body of water the sample was taken from; finally,
answer the questions below.
Questions
1.
What patterns do you observe based on
the information in Table 2?
2.
Develop a hypothesis relating to the
amount of dissolved oxygen measured in the water sample and the number of fish
observed in the body of water.
3.
What would your experimental approach be
to test this hypothesis?
4.
What would be the independent and
dependent variables?
5.
What would be your control?
6.
What type of graph would be appropriate
for this data set? Why?
7.
Graph the data from Table 2: Water
Quality vs. Fish Population (found at the beginning of this exercise).
8.
Interpret the data from the graph made
in Question 7.
Exercise
2: Testable Observations
Determine which of the following observations are
testable. For those that are testable:
Determine if the observation is
qualitative or quantitative
Write a hypothesis and null hypothesis
What would be your experimental
approach?
What are the dependent and independent
variables?
What are your controls – both positive
and negative?
How will you collect your data?
How will you present your data (charts,
graphs, types)?
How will you analyze your data?
Observations
When
a plant is placed on a window sill, it grows 3 inches faster per day than when
it is placed ona coffee table in the middle of the living room.
1.
The teller at the bank with brown hair
and brown eyes is taller than the other tellers.
2.
When Sally eats healthy foods and
exercises regularly, her blood pressure is 10 points lower than when she does
not exercise and eats fatty foods.
3.
The Italian restaurant across the street
closes at 9 pm but the one two blocks away closes at 10 pm.
4.
For the past two days, the clouds have
come out at 3 pm and it has started raining at 3:15 pm.
5.
George did not
sleep at all the night following the start of daylight savings.
Exercise 3:
Conversion
For each of the following, convert each
value into the designated units.
Exercise 4: Accuracy and Precision
For the following, determine whether the
information is accurate, precise, both or neither.
1.
During gym class, four students decided
to see if they could beat the norm of 45 sit-ups in a minute. The first student
did 64 sit-ups, the second did 69, the third did 65, and the fourth did 67.
2.
The average score for the 5th grade math
test is 89.5. The top 4th graders took the test and scored 89, 93, 91 and 87.
3.
Yesterday the temperature was 89 °F,
tomorrow it’s supposed to be 88 °F and the next day it’s supposed to be 90 °F,
even though the average for September is only 75 °F degrees!
4.
Four friends decided to go out and play
horseshoes. They took a picture of their results shown to the right:
5.
A local grocery store was holding a
contest to see who could most closely guess the number of pennies that they had
inside a large jar. The first six people guessed the numbers 735, 209, 390,
300, 1005 and 689. The grocery clerk said the jar actually contains 568
pennies.
Exercise 5:
Significant Digits and Scientific Notation
Part 1: Determine the number of
significant digits in each number and write out the specific significant
digits.
Part
2: Write the numbers below in scientific notation, incorporating what you know
about significant digits.
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