PSSA Prep 8th Grade Science 2/10/20

A scientist measured dissolved oxygen (O2) levels in a pond over time. A graph showing the results of the measurements is shown. Which statement is the most accurate description of the events occurring in the pond during the time shown?

• A. Aquatic plants consume O2 in the pond through respiration at a constant level.

• B. Aquatic plants consume O2 in the pond through respiration mostly during the early morning.

• C. Aquatic plants provide additional O2 for the pond through photosynthesis from late

• D. Aquatic plants provide additional O2 for the pond through photosynthesis from early morning until late afternoon.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3