You haven't completed the exercise.

Review unit: Part 3 (Exercise 1.1)


1. Challenger Deep is a very deep trench in the ocean near the island of Guam in the Pacific.


2. Creatures at the bottom of the Hudson Canyon need to withstand immense water pressure.


3. The Gulf Stream is an ocean current that flows into the Caribbean Sea.


4. The fall and rise of the tides are determined by the gravitational pull of the sun and moon.


5. Neap tides are smaller than spring tides.