Can someone help me on three crossword puzzle questions? (Social Studies/Geography)?

Question

DOWN-

2. An area of water entirely surrounded by land. (4 letters, first letter is "l")

7. Low land lying between two areas of higher elevation. (6 letters)

ACROSS-

9. A branch of the ocean or sea that indents the land but is not as large as a gulf. (3 letters)

Answer 1

Lake, Valley, Bay or Cay.

Answer 2

2. lake

7. valley

9. bay

Answer 3

Lake, Valley and Bay sound good to me!

Answer 4

2 lake

7 valley

9 i do not know

Answer 5

Lake

VAlley

BAy

OOh ya!