Hurry ! 1. which of the following separates layers of different density? a. thermocline b. pycnocline c. halocline d. incline 2. if you took a white piece of plastic to a depth of 180 m, what color would it appear? a. orange b. yellow c. red d. blue . 3. where would you find the least dense water? a. at the surface of the atlantic ocean b. below 1,000 m in the pacific ocean c. at 200 m in the arctic ocean d. at 1,000 m in the antarctic ocean