1. Scientist 3: John Snow (continued…)
L.O: to analyse John Snows work
to distinguish between a causal relationship and a correlation
Starter: Complete the worksheet on shampoo research to recall knowledge on HSW!

2. Starter Answers: 1 a) Factor = type of shampoo
Outcome = percentage of breakage
1 b) increase the number of hair samples tested / test each sample more than 3 times and calculate an average
1 c i) Person hair is from / length of hair
1 c ii) To ensure the test is VALID, so you can clearly see that only one variable is having an effect.

3. Correlation and Cause

14. Activity 1
Solve the anagrams about cause vs. correlation first in the right hand column
THEN match it up to the correct paragraph on the right.
(e.g. paragraph A does NOT match with anagram 1! Be careful!)

15. Activity 1 Answers: Paragraph A matches with anagram 8 – larger
Paragraph B matches with anagram 3-correlation
Paragraph C matches with anagram 6 - chance
Paragraph D matches with anagram 4 – control
Paragraph E matched with anagram 9 –mechanism
Paragraph F matched with anagram 10 – random and anagram 7 - matched
Paragraph G matched with anagram 2 – outcome
Paragraph H matched with anagram 1 – factors
Paragraph I matched with anagram 5 - causes

16. Activity 2
Complete worksheet on John Snow, to analyse his work on cholera.