Homework For This Class Period

The homework for this class will be given as a quiz in Canvas. It is a class review homework and called Class Review Set #1.

Here are the questions:

1. What are the differences between scientific facts and scientific theories?
2. How do you define a good model?
3. Does the following argument establish the truthfulness of the conclusion? Explain.
   • P1 If an object floats on top of a liquid, then the object is less dense than the liquid.
   • P2 A container full of soda floats on top of water.
   • C Soda is less dense than water.
4. (a) A metal ball has a mass of 3.2 g and displaces a volume of 2.0 mL. What is the density of the metal ball? (b) Another ball has a mass of 4.8 g and a density of 1.2 g/mL. What is the volume of this ball? (c) A third ball has a density of 2.5 g/mL and a volume of 3.0 mL. What is the mass of this third ball?
5. (a) What happens in the exploration phase of the 3-phase inquiry learning cycle presented in class? (b) Give an example of what each phase of the learning cycle might look like in a specific classroom exploration.
6. Is an aluminum rowboat and its contents more or less dense than water while you are sitting in the rowboat? Write a conditional argument to justify your answer.
7. If a blue ball floats in liquid A and sinks in liquid B, what can you say about the density of liquid A compared to the density of liquid B? Explain.
8. If you obtained the following data for repetitive determinations of the density of copper, what would you report as the density of copper?

   Determination Number	Result
   1	8.882 g/mL
   2	9.05 g/mL
   3	8.736 g/mL
   4	9.222 g/mL
   5	8.993 g/mL

9. Thinking about our class activity where the box stopped at the edge of the board, write a conditional argument with the following conclusion: "The box stops at the edge."
10. Thinking about our density activity with floating and sinking spheres, write a logical argument with the conclusion: "The red ball sinks in A and sinks in B."