What do you need to know for the test?

Or, “How I Learned to Stop Worrying and Love the Study Guide”

*What do you need to know for the test?

*Review the results of your Quia quizzes and

correct your mistakes on your own paper.

*Scientific Notation Quiz

*Unit conversions Quiz

*Graphing: you should be able to . . .

*Determine the slope of the line.

*Explain the meaning of the slope of the line.

*Determine the y-intercept.

*Explain the meaning of the y-intercept.

*Relate the R2 value to the precision of the data.

*Given the "accepted" value, determine the accuracy of the data.

*Choose the independent variable (graphed on the x-axis) and the dependent variable (graphed on the y-axis).

*Explain the difference between an independent variable (cause) and the dependent variable (effect)

*Slope = ?

*Slope = -3

*Meaning of slope = ?

*Meaning of slope: for every interruption, 3 homework

problems were missed.

*Y-intercept = ?

*Y-intercept = 25

*Meaning of y-intercept = ?

*Meaning of y-intercept = number of correct homework problems

with 0 interruptions

*Precision of the data = ?

*Precision of the data = extremely good; R2 = 1.000; all of the points are on the best-fit

line

*Independent variable = ?

*Independent variable = number of interruptions;

graphed on x-axis; “cause”

*Dependent variable = ?

*Dependent variable = #correct homework problems; graphed on

y-axis; “effect”

*Slope of the line = ?

*Slope of the line = 0.7427

*Meaning of the slope = ?

*Meaning of the slope = for every cm gained in height,

weight increased by 0.7427 kg

*The y-intercept = ?

*The y-intercept = -71.371 kg

*Meaning of the y-intercept = ?

*Meaning of the y-intercept = if an 11-year-old has a height of zero,

their mass will be -71.371 kg. Does this make sense?

*Precision of the data = ?

*Precision of the data = not very precise; points scattered around

the line; R2 value isn’t close to 1.0000

*Slope = ?

*Slope = $0.0053/gallon; slope means that every gallon costs

$.0053.

*Y-intercept = ?

*Y-intercept = 13.35; means that $13.35 is base charge, what you’ll pay even if you use no

water.

*Slope =?Which line/curve describes the data

the best – the red or the black? How do you know?

* Slope = 0.0106 s/cm; for every cm in length, the period increases by 0.0106 s. The red curve

describes the data better than the black line. The curve’s R2 value is closer to 1.000 than the line’s

R2 value.

*On your own, review using these activities

*Can you handle the hypothesis?  (http://www.quia.com/pop/105061.html) (updated)

*Choose whether a statement or a group of statements represents a theory, hypothesis, opinion, or fact.

*“Scientific Method and Experimentation” (http://www.quia.com/rr/117182.html)

*Know the process of science

*Melanoma Mystery (http://www.quia.com/cz/62325.html)

*Checks Lab: parallels with how

science is really done

*multiple investigators working together and critiquing each others' work

*as more evidence was gathered, the explanations from each group became more and more similar

*inherently tentative nature of scientific theories - no answer is "carved in stone" anywhere

*scientific theories ARE well-tested

*revised as new evidence is found

*must be able to use scientific theories to make predictions

*Be able to write coherently on any of

these questions

1. After scientists have developed a theory (e.g. atomic theory), does the theory ever change?

A. If you believe that theories do change, explain why we bother to teach scientific theories. Defend your answer with examples

B. If you believe that theories don’t change, explain how scientific knowledge progresses. Defend your answer with examples.

2. What makes science (or a scientific discipline such as physics, biology, etc.) different from other disciplines of inquiry (e.g., religion, philosophy)?

3. In the past, people believed that the sun and planets of our solar system revolved around the earth. Today we know that the sun is at the center of our solar system. Explain how this change in our understanding of the solar system illustrates how scientific knowledge develops. Refer back to the "Checks Lab" we did in class.

4. Is there a difference between scientific knowledge and opinion? Give an example to illustrate your answer.

5. Scientists perform experiments/investigations when trying to find answers to the questions they put forth. Do scientists use their creativity and imagination during their investigations? 

A. If yes, then at which stages of the investigations do you believe scientists use their imagination and creativity: planning and design, data collection, after data collection? Please explain why scientists use imagination and creativity. Provide examples.

B. If you believe that scientists do not use imagination and creativity, please explain why. Provide examples.

*Science Process Skills

*Questions from two no-risk Quia quizzes:

*http://www.quia.com/quiz/654946.html

*http://www.quia.com/quiz/639767.html

*Good luck!

*May the probability of you doing well on this test = 1

*¡Buena suerte!

* سعيدا حظا

*Успех

*好运气*Bonne chance!

*Lykke til!