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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