Lab 1 – Introduction to Science Exercise 1: The Scientific Method 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 parts per million (ppm). Examine the data in Table 4 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.
c. produce control variables. d. produce a comparison. e. hold independent variables constant. 2. The control group in an experiment a. fixes the level of a variable across all experimental conditions.
____________________________________________________________________ d. In your own words, what is the dependent variable? __________________________________________________________________________________________________________________________________________________________ 8. Set-up the data table below, showing you understand how you would take data for this experiment. | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Identify the causal hypothesis at issue. 2. Identify what kind of investigation it is. 3. There are control and experimental groups.
Additional info b). Additional info b. Explanation 2. Point (parenthetical documentation) a. Explanation b.
Also include any observations that you made over the course of part II. (4 points) Unknown (A,B,C,D) Mass of Metal Volume of water Initial temp. in calorimeter Initial temp. in beaker Final temp. of mixture Metal C 25.605g 24.6mL 25.2°C 100.5°C 28.7°C Calculations: Show your work and write a short explanation with each calculation.
Identify the causal hypothesis at issue. 2. Identify what kind of investigation it is. 3. There are control and experimental groups.
Lab 1 – Introduction to Science Exercise 1: The Scientific Method Dissolved oxygen is oxygen that is trapped in a fluid, such as water. Since many living organisms require 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 parts per million (ppm). Examine the data in Table 4 showing the amount of dissolved oxygen present and the number of fish observed in the body of water the sample was taken from and then answer the questions below. QUESTIONS 1.
• Fish: The Rideau River has a variety of cool-water fish. Sunfish are the most predominate but there is also a wealth of minnows, pike, catfish and other bottom feeders. The rarest species of fish in the Rideau River are the mottled sculpin and emerald shiner. • Native Mussels: Mussels are an important part of the Rideau Rivers ecosystem by filtering around 8 gallons of water in a single day. They accomplish this by feeding on algae and bacteria.
Be sure to define all the terms of your hypothesis. What are your independent and dependent variables? How odes your hypothesis compare with the study to be replicated? 4. Method: a.