Hi folks,
Today we took some time taking a look at the concepts of causation vs. correlation by looking at some very strange correlations using graphs. We also saw how easy it is to create a graph that gives a false impression of the results. Finally, we finished the density lab we started last week and explored the concept of buoyancy a bit as well.
Homework for next week is to:
Read pages 26-28 in the Conceptual Chemistry book. (Including the part in green.)
Give me 3 examples of a correlation that has no causation. (Ex. Full moon and a busy ER.)
Give me 3 examples of a correlation that does show causation. (Ex. Taking Advil and curing a headache.)
Find the volume, the mass and the density of something at your house.
On page 33 do questions #41 - 44
On page 34 do questions #10, 13 - 19
Answer the following questions.
1. If an object has a mass of 23.4g and a volume of 45ml what is it's density? Will it float in water?
2. If an object has a density of .001g/ml and you have a 90 liter sample of it…what's its mass? (Be sure to convert units here!)
3. If you have 23 kg of gold (yay for you!) how much gold (volume) do you have? (Use the magical internets to look up the density of gold.)
4. Again, with the help of the magical internets, find the metals with the 5 greatest densities. What is the least dense metal?
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