Q: What thin layer of air acts as a barrier to prevent cool air from mixing with warm air in the stratosphere? Choices: - methosphere - endosphere - liposphere - tropopause A:
tropopause

(Question)
Q: What is the vertical extent of ocean water called? Choices: - oceanic pillar - ocean column - water row - water column A:
(Answer)
water column

Ques: Q: The mercury or alcohol in a common glass what changes its volume as the temperature changes? Choices: - calculator - compass - barometer - thermometer A:
Ans: thermometer

(Q).
Q: How many nonpolar bonds does an oxygen molecule have? Choices: - 5 - 7 - 3 - 2 A:
(A).
2

Ques:Q: Biochemical compounds that include sugars, starches, and cellulose are examples of what? Choices: - electrolytes - lipids - proteins - carbohydrates A:

Ans:carbohydrates

Ques:Q: Just as the reaction of a diol and a diacid forms a polyester, the reaction of a diacid and a diamine yields this? Choices: - phenol - polyethylene - acetone - polyamide A:

Ans:
polyamide