NC WATER QUALITY CHECK

EOG Mastery Assessment

STUDENT ID:

GRADE 8 SCIENCE

General Instructions:

Read each prompt and data set carefully. For multiple-choice questions, choose the best answer. For the argument construction task, use specific evidence from the provided context.

1

A student monitors a creek near a new housing development. They notice the water has become very "muddy" after rain, and the water temperature has increased by 4°C. Which water quality indicator is directly responsible for both of these observations?

A) pH level

B) Turbidity

C) Dissolved Oxygen

D) Bio-indicators

2

Based on the graph below, which human activity likely occurred at Site X during Month 4?

Nitrate Level

M1M2M3M4M5

A) A factory installed a new water filtration system.

B) A large-scale application of fertilizer to nearby crops.

C) A decrease in global average temperatures.

D) The population of sensitive stoneflies increased.

3

Why is a discharge pipe from a chemical plant classified as "Point Source Pollution," while runoff from a residential neighborhood is "Non-Point Source Pollution"?

A) Point source pollution is always more toxic than non-point source.

B) Non-point source pollution only happens in urban environments.

C) Point source comes from a single, identifiable location.

D) Non-point source pollution is easier to regulate and stop.

4

In a local pond, an algal bloom has occurred. Within a week, several fish are found dead. Which sequence of events best explains this ecological disaster?

A) Algae produce too much oxygen → Fish die from oxygen toxicity.

B) Algae die → Bacteria decompose algae → Oxygen is depleted → Fish suffocate.

C) Algae shade the water → Water gets too cold → Fish die of hypothermia.

D) Fish eat too much algae → They become too heavy to swim.

5

North Carolina residents near the Cape Fear River are concerned about PFAS chemicals in their water. Which stewardship action would be most effective at solving the problem of industrial chemical contamination?

A) Encouraging citizens to pick up litter in parks.

B) Increasing the number of fish in the river.

C) Passing state laws to lower the legal limit of chemical discharge.

D) Painting murals about the importance of clean water.

6

Argument Construction Task

Context: A rural NC town is debating whether to allow a new industrial hog farm to open within 1 mile of a major river. Farmers argue it will provide jobs. Environmentalists argue it will ruin the water quality downstream.

Your Task: Construct a logical argument evaluating whether the farm should be allowed to open. You must include at least two specific water quality indicators (e.g., pH, Nitrates, DO) and one potential solution in your argument.

NC Water Watch

NC Water Watch Slides

Cape Fear Case Study Worksheet

Hog Farm Runoff Worksheet

Water Quality EOG Prep Assessment

NC Water Watch Teacher Toolkit

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