Describe the difference you found between the treated and ...

[jCorn1234]

Describe the difference you found between the treated and untreated
  potatoes. What did you expect to find?

 
  What will be an ideal response?

Question 2

Before refrigeration, how do you think people dealt with the spoilage
  problems associated with dairy products?

 
  What will be an ideal response?

[Benayers]

Answer to Question 1

Students should expect to find more bacteria on the treated potatoes. Students
should find their expectations to be true

Answer to Question 2

Student answers will vary. People used salt to preserve many dairy products,
especially cheeses. Raw milk had to be used circa the time it was collected.
Buttermilk would remain fresh longer due to lowered pH, which retards bacterial
growth.