Test Tomorrow!!!. Test Tomorrow!!! YOU work on Obj. 19 and 20 Role of skepticism? How does science work?

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Presentation transcript:

Test Tomorrow!!!

YOU work on Obj. 19 and 20 Role of skepticism? How does science work?

Take out your Objective Sheets Any questions on any Objectives?

Ways of Knowing Empirical Knowledge Repeatedly established by others Reasoned argument http://jennifersaylor.files.wordpress.com/2006/08/dna.jpg

Ways of Knowing Empirical Knowledge – YOU saw, touched, DID, etc. Example? http://jennifersaylor.files.wordpress.com/2006/08/dna.jpg

Ways of Knowing Repeatedly established by others? Example? http://jennifersaylor.files.wordpress.com/2006/08/dna.jpg

Ways of Knowing Reasoned argument? IF… THEN? Example? http://jennifersaylor.files.wordpress.com/2006/08/dna.jpg

Gaining Empirical Knowledge Experiment vs Observational Study What IS an experiment? When is that not practical?

Elodea is a plant that lives in water Elodea is a plant that lives in water. Like all plants, elodea can make its own food through photosynthesis. Oxygen gas is also produced during photosynthesis. Photosynthesis can only happen in the presence of light. To measure the rate of photosynthesis, a piece of elodea can be placed in an inverted test tube filled with a sodium bicarbonate solution. Oxygen gas produced by photosynthesis will collect at the top of the test tube. A student has designed an experiment using elodea plants. The experimental setup is shown in the figure below.

1. The figure shows the setup the student devised to test her hypothesis. What do you think the student’s hypothesis was? 2. What is the purpose of part A of Figure 1–4? (Note: The overturned bucket is solid, not see-through.) 3. What is one easy way that the student can measure the rate of photosynthesis using this setup? Explain your answer. 4. What is one variable that is not controlled in the experiment shown in the figure? 5. Using Figure 1–4, describe one way that the student can reduce the error in this experiment.

How much has the yearly Avg Global Temp. changed since you were born? How much since 1960? Since 1940?

More Practice… YAY!!!!! Work on graphing questions Finish for homework

Graphing Practice 1 – C 2 – C 3 – D 4 – E 5 – A 6 - C 7 – B 8 – B 14 – 302 15 – A 16 – A