Answer:
The BOD5 for this sample is 5 mg/L
Explanation:
The BOD5 takes into consideration the difference between the initial DO and the final DO divided by the fraction of the sample tested in a 300 mL BOD flask. The problem states that the sample was directly placed in a BOD bottle so we assume that the volume used was 300 mL of the water sample. The fraction of water is 1 (300/300).
BOD5 = (10-5)/1
BOD 5 = 5 mg/L
Erosion, deposition, and weathering
Answer:
Fossil records and carbon contents.
Explanation:
- The type of the sedimentary that are present in the Himalayas were the marble, dolomite and silts stone and shale and limestone as per the geologic records the carbon dating of the rocks reveals there ages as per the data collected from the accumulation of the sediments. The upliftment of seas and also the fossil life of the plants and animals that were found during that period.
Answer: Principle of Superposition
Explanation: In an otherwise undisturbed sequence of sedimentary strata, or rock layers, the layers on the bottom are the oldest and layers above them are younger. Principle of Original Horizontality: Layers of rocks deposited from above, such as sediments and lava flows, are originally laid down horizontally. Hope this helps!
