---
title: "Unit 8 – Aquatic & Terrestrial Pollution - AP Environmental Science"
description: "Review Unit 8 – Aquatic & Terrestrial Pollution for AP Environmental Science with Fiveable study guides and practice resources."
canonical: "https://fiveable.me/ap-enviro/unit-8"
type: "unit"
subject: "AP Environmental Science"
unit: "Unit 8 – Aquatic & Terrestrial Pollution"
---

# Unit 8 – Aquatic & Terrestrial Pollution - AP Environmental Science

## Overview

Review Unit 8 – Aquatic & Terrestrial Pollution for AP Environmental Science with Fiveable study guides and practice resources.

## Study Guides

- [8.1 Sources of Pollution](/ap-enviro/unit-8/sources-pollution/study-guide/AAXMiQ1MNW3SoMgY3nBE)
- [8.7 Persistent Organic Pollutants (POPs)](/ap-enviro/unit-8/persistent-organic-pollutants/study-guide/NGJL9C6G0X404T0kBdaP)
- [8.10 Waste Reduction Methods](/ap-enviro/unit-8/waste-reduction-methods/study-guide/P47EbL7U0etcWIggUk93)
- [8.8 Bioaccumulation and Biomagnification](/ap-enviro/unit-8/bioaccumulation-biomagnification/study-guide/Y54MCai6Nx7x01swrTb6)
- [8.6 Thermal Pollution](/ap-enviro/unit-8/thermal-pollution/study-guide/hhXqgEYKmPzaZcFD6uLT)
- [8.11 Sewage Treatment](/ap-enviro/unit-8/sewage-treatment/study-guide/k6tH0cz62Ysho1sbilgE)
- [8.4 Human Impacts on Wetlands and Mangroves](/ap-enviro/unit-8/human-impacts-on-wetlands-mangroves/study-guide/kxkfXkF2OACm1Tcwb8u7)
- [8.14 Pollution and Human Health](/ap-enviro/unit-8/pollution-human-health/study-guide/pHKSEzoQCweTAZu8B29F)
- [8.5 Eutrophication](/ap-enviro/unit-8/eutrophication/study-guide/pht3gvVqyWzrKeAwXm4F)
- [8.3 Endocrine Disruptors](/ap-enviro/unit-8/endocrine-disruptors/study-guide/uat2X3iE9TYGdZa4kKHx)
- [8.2 Human Impacts on Ecosystems](/ap-enviro/unit-8/human-impacts-on-ecosystems/study-guide/vDIaAmErLq8YZ2cvJYxv)
- [8.13 Dose Response Curve](/ap-enviro/unit-8/dose-response-curve/study-guide/w3pkyxHmZkYUGDSjMKXk)
- [8.9 Solid Waste Disposal](/ap-enviro/unit-8/solid-waste-disposal/study-guide/x0oYfNWgX71t8XELmhY2)
- [8.15 Pathogens and Infectious Diseases](/ap-enviro/unit-8/pathogens-infectious-diseases/study-guide/xwGfaDy8boZiAkBqBrzm)
- [8.12 Lethal Dose 50% (LD50)](/ap-enviro/unit-8/lethal-dose-50-percent-ld50/study-guide/TAa4nnWGzeffK0Gvo6iO)

## FAQs

### What topics are covered in APES Unit 8?

APES Unit 8: Aquatic and Terrestrial Pollution covers 15 topics across pollution sources, ecosystem impacts, and human health. Key topics include Sources of Pollution, Eutrophication, Endocrine Disruptors, Persistent Organic Pollutants (POPs), Bioaccumulation and Biomagnification, Solid Waste Disposal, Sewage Treatment, Dose Response Curve, and Pathogens and Infectious Diseases. Here's the full topic list:
- 8.1 Sources of Pollution
- 8.2 Human Impacts on Ecosystems
- 8.3 Endocrine Disruptors
- 8.4 Human Impacts on Wetlands and Mangroves
- 8.5 Eutrophication
- 8.6 Thermal Pollution
- 8.7 Persistent Organic Pollutants (POPs)
- 8.8 Bioaccumulation and Biomagnification
- 8.9 Solid Waste Disposal
- 8.10 Waste Reduction Methods
- 8.11 Sewage Treatment
- 8.12 Lethal Dose 50% (LD50)
- 8.13 Dose Response Curve
- 8.14 Pollution and Human Health
- 8.15 Pathogens and Infectious Diseases See [APES Unit 8](/ap-enviro/unit-8) for matched practice on all 15 topics.

### How much of the APES exam is Unit 8?

APES Unit 8 makes up 7-10% of the AP Environmental Science exam. That slice covers aquatic and terrestrial pollution, including point and nonpoint sources, bioaccumulation and biomagnification, eutrophication, sewage treatment, and pathogens and infectious diseases. It's a focused unit, but the concepts show up in both the MCQ and FRQ sections.

### What's on the APES Unit 8 progress check (MCQ and FRQ)?

The APES Unit 8 progress check in AP Classroom includes both an MCQ section and an FRQ section drawn from the unit's 15 pollution topics. The MCQ portion tests concepts like eutrophication, bioaccumulation and biomagnification, endocrine disruptors, and sewage treatment. The FRQ portion often asks you to analyze pollution scenarios, interpret a dose response curve, or evaluate waste reduction strategies. Pathogens and infectious diseases and LD50 calculations are also common targets. For practice questions matched to every progress check topic, visit [APES Unit 8](/ap-enviro/unit-8).

### How do I practice APES Unit 8 FRQs?

The best way to practice APES Unit 8 FRQs is to focus on the topics that generate the most free-response questions: eutrophication, bioaccumulation and biomagnification, sewage treatment, and pathogens and infectious diseases. FRQs in this unit typically ask you to identify pollution sources, explain environmental or health impacts, or propose solutions. For dose response curve questions, practice reading the graph and calculating or comparing LD50 values. Work through past prompts by writing out full responses, then check your reasoning against the scoring guidelines. You can find practice sets organized by topic at [APES Unit 8](/ap-enviro/unit-8).

### Where can I find APES Unit 8 practice questions?

For APES Unit 8 practice questions, including multiple-choice and practice test sets, [APES Unit 8 on Fiveable](/ap-enviro/unit-8) organizes MCQs and FRQs by topic across all 15 pollution topics. When you're doing MCQ practice, prioritize bioaccumulation and biomagnification, eutrophication, sewage treatment, and infectious diseases since those appear most often. Mixing topic-specific drills with full practice test sections helps you get comfortable with the range of question types College Board uses for this unit.

### How should I study APES Unit 8?

Start APES Unit 8 by grouping the 15 topics into three clusters: pollution sources and ecosystem impacts (8.1-8.6), chemical pollutants and their movement through food chains (8.7-8.8), and waste management and human health (8.9-8.15). Learn point vs. nonpoint sources first since that framing applies across the whole unit. Then build out your understanding of bioaccumulation and biomagnification, eutrophication, and sewage treatment, which are the highest-yield topics for both MCQ and FRQ. For the health side, make sure you can read a dose response curve and explain how pathogens and infectious diseases spread through contaminated water or soil. Draw diagrams for eutrophication and biomagnification rather than just reading about them. Finish each study session with a few practice questions to catch gaps early. [APES Unit 8](/ap-enviro/unit-8) has resources organized by topic to keep your review focused.

### What graphs do I need to know for APES Unit 8?

The most important graph in APES Unit 8 is the dose response curve (Topic 8.13), which plots the effect of a pollutant against the dose given to a population. You need to read the curve to identify the LD50, the dose at which 50% of a test population dies, and compare toxicity between substances. A steeper curve means a more potent toxin. You should also be comfortable reading eutrophication diagrams that show how excess nutrients drive algal blooms, deplete oxygen, and create dead zones. Biomagnification diagrams showing pollutant concentration increasing at each trophic level appear in both MCQ and FRQ contexts. Practice labeling and interpreting all three at [APES Unit 8](/ap-enviro/unit-8).

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