Unit I (Chapter 1 & 2) ReviewGraphing and the Scientific Method

1. What type of graph is this?2. What would be a good title for this graph?3. What is the range of the x-axis? The y-axis?4. What does the x-axis “go by”? The y-axis?5. What is this graph showing? 6. Is this a direct or indirect relationship? Weak or strong?7. What is the label for the x-axis? The y-axis8. What are the units for the x-value? The y-value?9. What is the dependent variable? Independent variable?

Temperature of Helium (°C)

• A student performs the following experiment:– A toy car with 100 grams mass in it is rolled down a ramp three

times. Here are the results: 0.78 seconds, 0.79 seconds, and 0.81 seconds. The average is 0.80 seconds.

– The same toy car is then rolled down three times with 200 grams mass in it. Here are the results: 0.77 seconds, 0.80 seconds, and .81 seconds. The average is 0.79 seconds.

1. What might have been her hypothesis for his experiment?2. What is the dependent (responding) variable? Independent

(manipulated) variable?3. What would be a good title for this experiment?4. List three controls she should have.5. What is the resolution of the stopwatch she used?6. Is her data precise? Why?7. How might she not objective in this experiment?8. What type of graph would be appropriate for this data? Why?9. What conclusion can you make from the data?

Design

• Design an experiment to determine if the orange car will take less time to go down a ramp than a blue car.

• Describe in terms of accuracy and precision.

• What is the length of this object?

• Was Mr. Jansen’s experiment on a bike with 26 inch wheels vs. a bike with 29 inch wheels valid?– Why or why not?

• What is wrong with saying? – “I have a theory. Aliens on Mars are probably red in

color.”• Convert 356 mm to cm.• Convert 0.0000043 kg to mg.

• What is the volume of water in each container?