NC 8.L.1

Which best explains why there is a greater concentration of oxygen located near the ocean’s surface?

• Sunlight warms the ocean’s temperature and stimulates oxygen production near the surface

• Plankton produces excess amounts of nutrients that remove oxygen levels from the atmosphere

• Marine life gives off oxygen instead of carbon dioxide, which makes the ocean water rich in oxygen

• Plants, which release oxygen, live near the surface of the ocean, where they receive large amounts of sunlight

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Which characteristic of a cold-water upwelling near the coast of Northern California results in a large concentration of marine organisms?

• loss of thermal stability

• high nutrient concentration

• consistent surface-current flow rate

• increased availability of dissolved oxygen

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Which are the most abundant dissolved gases in ocean water?

• nitrogen and carbon dioxide

• oxygen and carbon dioxide

• oxygen and methane

• nitrogen and sulfide

Which would most likely result in an unhealthy aquatic habitat?

• a decrease in turbidity

• a decrease in nitrates levels

• an increase in water temperature

• an increase in dissolved oxygen levels

Tags

NGSS.MS-LS2-4

Which would most negatively impact local water availability?

• floods

• droughts

• hurricanes

Tags

NGSS.MS-ESS2-4

Which best describes the importance of an aquifer?

• It holds uncontaminated ground water for human consumption

• It supplies all water for lakes and rivers

• It provides water for oceans

What is the movement of cold, nutrient-rich waters from the bottom of the ocean, promoting algae growth?

• upwelling

• deposition

• precipitation

• eutrophication

The EPA (Environmental Protection Agency) regulates the level of turbidity in drinking water to protect public health. The EPA sets the limit at 0.3 NTU (Nephelometric Turbidity Units). The data shows the turbidity level of four samples taken from the same location over four consecutive days. Based on the data, which best explains the quality of the drinking water?

• The drinking water is safe because the first two samples are below the recommended limit

• The drinking water is unsafe because the last two samples are above the recommended limit

• The drinking water is unsafe because the last two samples are below the recommended limit

• The drinking water is safe because the average of the samples is below the recommended limit

Which most likely has the highest number of contaminants in the water?

• a water system with moderate turbidity

• a water system with high turbidity

• a water system with low turbidity

• a water system with no turbidity

If a newly discovered fish species is found to live in mildly acidic water, which is the best estimate of the pH range for the water?

• 0–2

• 5–6

• 7–8

• 13–14

Tags

NGSS.MS-LS2-4