Intro to Science Workbook

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School

Coastal Carolina Community College *

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Course

110

Subject

Biology

Date

Feb 20, 2024

Type

docx

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Uploaded by MajorSummerKoala3

Introduction to Science TOTAL POINTS: 14 POINTS EXERCISE 2: TESTABLE OBSERVATIONS (6 POINTS) Determine which of the observations below are testable. For those that are testable:  Write a hypothesis.  What are the dependent and independent variables?  What are your controls - both positive and negative? Observations 1. A plant grows 3 cm faster per day when placed on a window sill than it does when placed on a coffee table in the middle of the living room. Observation : A plant grows 3 cm faster per day when placed on a window sill than it does when placed on a coffee table in the middle of the living room. a. Hypothesis : Plants grow faster when exposed to more natural light. b. Independent Variable : Location of the plant (window sill vs. coffee table). c. Dependent Variable : Growth rate of the plant. d. Controls : i. Positive Control: A plant that responds positively to increased light. ii. Negative Control: A plant with no growth response to light changes. 2. The bank teller with brown hair and brown eyes is taller than the other tellers. Not testable. 3. When Sally eats healthy foods and exercises regularly, her blood pressure is 10 points lower than when she eats fatty foods and does not exercise. Observation : When Sally eats healthy foods and exercises regularly, her blood pressure is 10 points lower than when she eats fatty foods and does not exercise. a. Hypothesis : A combination of healthy eating and regular exercise results in lower blood pressure. ©eScience Labs, 2018

Introduction to Science b. Independent Variables : Diet (healthy vs. fatty foods) and exercise regimen. c. Dependent Variable : Sally's blood pressure. d. Controls : i. Positive Control: Individuals with known reductions in blood pressure due to diet and exercise. ii. Negative Control: Individuals with no change in lifestyle. 4. The Italian restaurant across the street closes at 9 pm, but the restaurant two blocks away closes at 10 pm. Not testable. 5. For the past two days, the clouds have come out at 3 pm, and it has started raining at 3:15 pm. Observation : For the past two days, the clouds have come out at 3 pm, and it has started raining at 3:15 pm. a. Hypothesis : The appearance of clouds at a specific time is a precursor to rainfall. b. Independent Variable : Time of cloud appearance. c. Dependent Variable : Time of rainfall onset. d. Controls : i. Positive Control: Historical weather data showing a similar pattern. ii. Negative Control: Days with cloud appearance not followed by rain. 6. George did not sleep at all the night following the start of Daylight Savings Time. Not testable. ©eScience Labs, 2018

Introduction to Science EXERCISE 3: CONVERSION (4 POINTS) Use Figure 9 to convert each value into the designated units. Figure 9: Conversions for temperature, time, mass, and length. 1. 46,756,790 mg = 46.75679 kg 2. 5.6 hours = 3600 seconds 3. 13.5 cm = 5.315 inches 4. 47 °F = 8.33 ° ©eScience Labs, 2018

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Introduction to Science EXERCISE 7: EXPERIMENTAL VARIABLES (3 POINTS) Determine the variables tested in each of the following experiments. If applicable, determine and identify any positive or negative controls. 1. A study is being done to test the effects of habitat space on the size of fish populations. Different sized aquariums are set up with six goldfish in each one. Over a period of six months, the fish are fed the same type and amount of food. The aquariums are equally maintained and cleaned throughout the experiment. The temperature of the water is kept constant. At the end of the experiment, the number of surviving fish are surveyed. A. Independent Variable :  The size of the aquariums to observe its effect on the size of the fish populations. B. Dependent Variable :  The number of surviving fish at the end of the experiment. C. Controls :  Keeping the type and amount of food fed to the fish constant.  Maintaining and cleaning the aquariums equally.  Keeping the temperature of the water constant.  Positive control: A tank size known to be optimal for fish survival.  Negative control : A tank size known to be detrimental to fish survival. PICTURE (1 POINT): Insert a picture of yourself completing this lab to this word document prior to uploading for full credit. ©eScience Labs, 2018

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