Correct answer: A

The correct answer is Rapid growth under abundant resources with a J-shaped curve.

1. Identify the environmental science concept: Determine whether the question concerns ecosystems, cycles, populations, pollution, climate, resources, conservation, policy, or environmental health.
2. Apply the systems principle: When resources are abundant and limiting factors are weak, a population can grow at an increasing rate.
3. Connect evidence to impact: The correct answer is Rapid growth under abundant resources with a J-shaped curve.

Correct answer: B

The correct answer is Growth that slows as the population approaches carrying capacity.

1. Identify the environmental science concept: Determine whether the question concerns ecosystems, cycles, populations, pollution, climate, resources, conservation, policy, or environmental health.
2. Apply the systems principle: Logistic growth includes environmental resistance and typically forms an S-shaped curve around carrying capacity.
3. Connect evidence to impact: The correct answer is Growth that slows as the population approaches carrying capacity.

Correct answer: C

The correct answer is The pattern of survival for individuals at different ages.

1. Identify the environmental science concept: Determine whether the question concerns ecosystems, cycles, populations, pollution, climate, resources, conservation, policy, or environmental health.
2. Apply the systems principle: Survivorship curves compare mortality patterns across the life span of a population.
3. Connect evidence to impact: The correct answer is The pattern of survival for individuals at different ages.

Correct answer: D

The correct answer is The buildup of a substance in an organism over time.

1. Identify the environmental science concept: Determine whether the question concerns ecosystems, cycles, populations, pollution, climate, resources, conservation, policy, or environmental health.
2. Apply the systems principle: A persistent substance can enter faster than an organism can eliminate it, causing concentration within that organism.
3. Connect evidence to impact: The correct answer is The buildup of a substance in an organism over time.

Correct answer: A

The correct answer is Increasing concentration of a persistent pollutant at higher trophic levels.

1. Identify the environmental science concept: Determine whether the question concerns ecosystems, cycles, populations, pollution, climate, resources, conservation, policy, or environmental health.
2. Apply the systems principle: Predators consume many contaminated organisms, so persistent pollutants can become more concentrated higher in a food web.
3. Connect evidence to impact: The correct answer is Increasing concentration of a persistent pollutant at higher trophic levels.

Correct answer: B

The correct answer is Nutrient enrichment that can cause algal blooms and oxygen depletion in water.

1. Identify the environmental science concept: Determine whether the question concerns ecosystems, cycles, populations, pollution, climate, resources, conservation, policy, or environmental health.
2. Apply the systems principle: Excess nitrogen and phosphorus can stimulate algae; decomposition of the resulting biomass consumes dissolved oxygen.
3. Connect evidence to impact: The correct answer is Nutrient enrichment that can cause algal blooms and oxygen depletion in water.

Correct answer: C

The correct answer is Pollution released from a specific identifiable source.

1. Identify the environmental science concept: Determine whether the question concerns ecosystems, cycles, populations, pollution, climate, resources, conservation, policy, or environmental health.
2. Apply the systems principle: A discharge pipe or treatment outlet is a point source because its location can be identified.
3. Connect evidence to impact: The correct answer is Pollution released from a specific identifiable source.

Correct answer: D

The correct answer is An unwanted change in water temperature caused by human activity.

1. Identify the environmental science concept: Determine whether the question concerns ecosystems, cycles, populations, pollution, climate, resources, conservation, policy, or environmental health.
2. Apply the systems principle: Heated water discharged into a river or lake can lower dissolved oxygen and stress aquatic organisms.
3. Connect evidence to impact: The correct answer is An unwanted change in water temperature caused by human activity.

Correct answer: A

The correct answer is Aquatic systems, soils, forests, and buildings.

1. Identify the environmental science concept: Determine whether the question concerns ecosystems, cycles, populations, pollution, climate, resources, conservation, policy, or environmental health.
2. Apply the systems principle: Sulfur and nitrogen oxides can form acidic compounds that alter soil and water chemistry and erode materials.
3. Connect evidence to impact: The correct answer is Aquatic systems, soils, forests, and buildings.

Correct answer: B

The correct answer is A pollutant formed in the environment by chemical reactions involving primary pollutants.

1. Identify the environmental science concept: Determine whether the question concerns ecosystems, cycles, populations, pollution, climate, resources, conservation, policy, or environmental health.
2. Apply the systems principle: Ground-level ozone is an example formed when nitrogen oxides and volatile organic compounds react in sunlight.
3. Connect evidence to impact: The correct answer is A pollutant formed in the environment by chemical reactions involving primary pollutants.