Please help Exercise 1A – Assessing hypotheses Circle YES if you think a hypothe
ID: 254569 • Letter: P
Question
Please help
Exercise 1A – Assessing hypotheses
Circle YES if you think a hypothesis is good (i.e., testable) as written, and NO if you think it is not. If you
choose NO, indicate how you would change the hypothesis to make it a good one.
Good hypothesis
1. Students who own laptops have higher GPAs.
2. Murders occur more often during a full moon.
3. Cats are happier when you pet them.
4. Sea level will be higher in 100 years than it is today.
Exercise 1B – Paper basketball experiment
YES or NO YES or NO YES or NO YES or NO
? State your hypothesis:
In the table below, record the number of shots made at each distance (out of 10) for each person:
Name 0 cm ____ cm ____ cm ____ cm
? What is your control in this experiment?
? What is the dependent variable? On which axis of your graph should it be plotted?
? What is the independent variable? On which axis of your graph should it be plotted?
? Is your independent variable continuous or discrete?
? Based on your answer to the question above, should you plot your data on a line or bar graph
Graph the data for each member of your group below:
? State your conclusion below addressing whether or not the data support your original hypothesis:
Exercise 1C – Graphing practice
Identify the independent and dependent variables for each data set, and graph each data set on the grids provided at the end of your worksheet:
1. Average monthly high and low temperatures in downtown Los Angeles from 1981 to 2010
Independent variable:_________________ Dependent variable: ____________________
2. Average distance from sun and temperature data for the planets of the solar system
Independent variable:_________________ Dependent variable: ____________________
3. National per capita CO2 emissions for 2009
Independent variable:_________________ Dependent variable: _________________
average distance from sun (millions of miles)
36
67
93
142
484
887
1784
2794
average surface temperature (oC)
179
453
12
-43
-153
-185
-214
-22
Brazil
Canada
China
France
India
Japan
Mexico
Nigeria
Russia
U.S.
CO2 emissions per person (metric tons)
2.1
16.2
5.8
6.3
1.4
8.6
4.0
0.5
11.2
17.7
Exercise 2A – Measurement of distance
Laboratory width: _________ m
Calculate approximate area: width _____ m
Paper width: _______ cm
Calculate approximate area: width _____ cm
Paper hole diameter: ________ mm
Your height: _______ cm, which is equal to _______ m
Indicate which metric unit of length you would use to measure the following:
length of a fork __________
size of a small pea __________ height of a refrigerator __________ diameter of an apple __________
Exercise 2B – Measurement of mass
width of a plant cell __________ length of your car __________ distance to the beach __________ size of a dust particle __________
Laboratory length: _________ m x length _____ m = _________ m2
Paper length: _______ cm
x length _____ cm = _________ cm2
Mass of Graduated Cylinder = _____________ g
Mass of Graduated Cylinder with 50 ml of water = _____________ g
Mass of 50 ml of water (difference of the two numbers above): ________________ g Difference between your measurement and actual weight of 50 ml of water (50 g): ________ Mass of Large Paper Clip = ____________ g
Exercise 2C – Measurement of volumes greater than 1 ml
Volume of fluid in Beaker A = ____________ ml Volume of fluid in Test Tube B = ____________ ml
Exercise 2D – Measurement of volumes less than 1 ml
Your instructor will initial the following volumes once you demonstrate that you have successfully measured and transferred each volume using a micropipettor:
100 ?l ______ 10 ?l ______ 1 ?l ______
Exercise 2E – Measurement of temperature
Ambient temperature in lab _____oC ice water _____oC boiling water _____ oC
Convert the following temperatures using the formulas on page 10 of the lab exercises:
Mild temperature: 72oF = _______ oC Body temperature 98.6oF = _______ oC Cold day 10oC = _______ oF Very hot day 34oC = _______ oF
Exercise 2F – Converting from decimal notation to exponential notation
Convert the following decimal numbers to exponential numbers:
186,000 = ____________ 32.9 = ____________ 700.02 = ____________
____________ = 0.00018 ____________ = 0.0369 ____________ = 0.00000025
Exercise 2G – Converting from exponential notation to decimal notation
Convert the following exponential numbers to decimal numbers:
3.7 x 103 = ____________ 1.01 x 107 = ____________ 4.0103 x 10-1 = ____________
Exercise 2H – Metric conversions
____________ = 106 ____________ = 2.818 x 10-3 ____________ = 8 x 105
Convert the following measurements to the indicated unit:
335.9 g = _________________ kg
0.00939 ?l = __________________ ml 456.82 ng = _________________ ?g
20 megabytes = __________ kilobytes
8 megabase pairs (mbp) = __________ kbp 25 mg = _____________ g
__________________ m = 0.0886 km __________________ kg = 89 mg __________________ dl = 900.5 cl __________________ ?m = 0.37 mm __________________ mm = 11.5 nm __________________ ?l = 0.046 l
average distance from sun (millions of miles)
36
67
93
142
484
887
1784
2794
average surface temperature (oC)
179
453
12
-43
-153
-185
-214
-22
Explanation / Answer
1) No. Students who own laptops donot score high CGPA
2) No.
Murders occur more often during a full moon is not a good hypothesis
3) good hypothesis. yes cats are happier when you pet them
4) No