Chapter 15

Question 1

acidification

Answer 1

the lowering of the pH of a solution.

Question 2

positive feedback

Answer 2

changes caused by an initial event accentuate that original event (i.e., changes brought on by warming lead to even more warning)

Question 3

negative feedback

Answer 3

changes caused by an initial event trigger events that then reverse the response (i.e., changes brought on by warming lead to cooling).

Question 4

coral reef

Answer 4

colonies of tiny animals (coral) that produce a calcium carbonate exoskeleton that over time build up to form large underwater structures (the reef) in shallow, war, tropical seas.

Question 5

estuary

Answer 5

region where rivers empty into the ocean