I need HELP! Question 1: Which condition helps determine the quality of lake water?

A) the amount of dissolved calcium carbonate

B) the amount of nitrogen

C) the amount of potassium

D) the amount of dissolved oxygen

D

Explanation:

Scientists measure a variety of properties to determine water quality. These include temperature, acidity (pH), dissolved solids (specific conductance), particulate matter (turbidity), dissolved oxygen, hardness and suspended sediment.

u i forgot the answer?

the mantle

explanation:

earth is divided into three layers: the crust or the outermost layer on which we live; the underlying, middle layer - the mantle - and the core (the innermost layer of earth).