Data Representation 2025

The range of a zone refers to the difference in depth between the top and the bottom of that zone. According to Figure 1, which two zones have similar ranges?

• Epipelagic and mesopelagic

• Mesopelagic and bathypelagic

• Mesopelagic and abyssopelagic

• Bathypelagic and abyssopelagic

Figure 2 indicates that approximately 35% of marine life lives between d=0m and:

• d=50m

• d=100m

• d=300m

• d=500m

According to information in Figures 1 and 2, the bathypelagic zone extends to a depth of approximately:

• 1000m

• 1500m

• 3600m

• 6000m

Based on Figure 1, the dissolved oxygen levels at d=10,000m would most likely be:

• less than 0.3 mg/L.

• between 0.3 and 0.9 mg/L.

• between 0.9 and 1.2 mg/L.

• between 1.2 and 1.5 mg/L.

Depths below 1,000 meters are considered aphotic because no sunlight penetrates that deep. Based on Figure 2, the aphotic zones account for approximately what percentage of marine life?

• 2%

• 10%

• 90%

• 98%

Colder ocean water is denser than warmer ocean water. A scientist compares the masses of two 1-liter samples of water: one collected at d=1,000m and one collected at d=3,600m. Based on Figure 1, which of the samples of water, if either, would have a lower mass?

• The sample at d=3,600m has a lower mass because the water temperature is lower and the density is higher.

• The sample at d=1,00m has a lower mass because the water temperature is higher and the density is lower.

• Both samples have the same mass because the density is the same for both samples.

• Both samples have the same mass because the volume is the same for both samples.