Ch 18: AP Environmental Science - Biological Science: Help and Review

About This Chapter

The Biological Science chapter of this AP Environmental Science Help and Review course is the simplest way to master biological science. This chapter uses simple and fun videos that are about five minutes long, plus lesson quizzes and a chapter exam to ensure students learn the essentials of biological science.

Who's it for?

Anyone who needs help learning or mastering AP environmental science material will benefit from taking this course. There is no faster or easier way to learn AP environmental science. Among those who would benefit are:

  • Students who have fallen behind in understanding biological diversity, pollution and habitat destruction
  • Students who struggle with learning disabilities or learning differences, including autism and ADHD
  • Students who prefer multiple ways of learning science (visual or auditory)
  • Students who have missed class time and need to catch up
  • Students who need an efficient way to learn about biological science
  • Students who struggle to understand their teachers
  • Students who attend schools without extra science learning resources

How it works:

  • Find videos in our course that cover what you need to learn or review.
  • Press play and watch the video lesson.
  • Refer to the video transcripts to reinforce your learning.
  • Test your understanding of each lesson with short quizzes.
  • Verify you're ready by completing the Biological Science chapter exam.

Why it works:

  • Study Efficiently: Skip what you know, review what you don't.
  • Retain What You Learn: Engaging animations and real-life examples make topics easy to grasp.
  • Be Ready on Test Day: Use the Biological Science chapter exam to be prepared.
  • Get Extra Support: Ask our subject-matter experts any biological science question. They're here to help!
  • Study With Flexibility: Watch videos on any web-ready device.

Students will review:

This chapter helps students review the concepts in a biological science unit of a standard AP environmental science course. Topics covered include:

  • Ocean and freshwater ecosystems
  • Forest ecosystems and biodiversity
  • Desert ecosystems
  • Extinction
  • Invasive species
  • Over-exploitation
  • Conservation biology
  • Ecology restoration

16 Lessons in Chapter 18: AP Environmental Science - Biological Science: Help and Review
Test your knowledge with a 30-question chapter practice test
Species Richness: Definition & Determining Factors

1. Species Richness: Definition & Determining Factors

In this lesson, you'll learn what species richness is and what factors can influence the index of species richness. You'll also discover why it is an important index to measure in terms of conservation.

Ecosystems of Oceans and Freshwater: Biological Diversity and Water

2. Ecosystems of Oceans and Freshwater: Biological Diversity and Water

In this lesson, you'll learn about the biodiversity of ecosystems based on water. You will discover that marine, freshwater and a mixture of salt and freshwater create very different ecosystems, which in turn influence the amount of biodiversity that is found in these habitats.

Biological Diversity and the Forest: Ecosystems of the Rainforests and Temperate Forests

3. Biological Diversity and the Forest: Ecosystems of the Rainforests and Temperate Forests

In this lesson, you'll learn about three main types of forests found on earth: coniferous, deciduous and tropical rainforests. You'll also discover how the ecosystems where these trees are located affect the biodiversity within them.

Desert Ecosystems: How Biodiversity Impacts Hot and Cold Deserts

4. Desert Ecosystems: How Biodiversity Impacts Hot and Cold Deserts

In this lesson, you'll learn about the biodiversity that makes up a desert ecosystem. You will discover what makes a desert a desert and study the different plant and animal life that inhabit both hot and cold deserts.

What Is Extinction? - Defining Background and Mass Extinction

5. What Is Extinction? - Defining Background and Mass Extinction

In this lesson you'll discover what the term 'extinction' means as well as learn the two different types of extinction: mass extinction and background extinction. You will also discover how humans contribute to extinction events.

Differences Between Endangered Species and Threatened Species

6. Differences Between Endangered Species and Threatened Species

In this lesson you'll learn about two terms that describe species with very low population numbers: threatened and endangered. You'll discover why species numbers decline and how we can keep the species that are threatened or endangered from going extinct.

Pollution and Habitat Destruction: The Human Factors Contributing To Endangerment & Extinction

7. Pollution and Habitat Destruction: The Human Factors Contributing To Endangerment & Extinction

In this lesson you will learn about two ways humans contribute to species extinction. We break up habitats by building roads and clearing land, and we pollute both land and water. You will also learn about the specific terms used to describe the processes, habitat fragmentation and anthropogenic pollution.

What Is an Invasive Species? - Definition, List & Effects

8. What Is an Invasive Species? - Definition, List & Effects

This lesson focuses on a group of organisms called invasive species. You'll learn what makes a species invasive and see some examples of invasive species. You'll also discover why invasive species are considered a problem and explore the impacts they have on the environment, the economy and on humans.

Over-Exploitation: How Humans Affect Ecosystems By Decreasing Species Populations

9. Over-Exploitation: How Humans Affect Ecosystems By Decreasing Species Populations

In this lesson, you'll learn how humans overexploit or overharvest species. You will discover the primary way in which humans are responsible for overfishing. You will also learn about how this negatively impacts ecosystems.

What Is Conservation Biology? - Definition & Principles

10. What Is Conservation Biology? - Definition & Principles

Conservation biology aims to reduce the human impact on the environment by looking for the causes and possible solutions to these problems. In this lesson, you'll learn about conservation biology and the different types of conservation.

Ecology Restoration: Foundations, Projects and Goals

11. Ecology Restoration: Foundations, Projects and Goals

In this lesson you will learn how humans have damaged various ecosystems on the planet and how a branch of ecology, restoration ecology, aims to restore these ecosystems. You will discover the main goal of restoration ecology as well as some of the ways habitats are restored.

The Endangered Species Act & The World Conservation Strategy: Goals & Purposes

12. The Endangered Species Act & The World Conservation Strategy: Goals & Purposes

In this lesson, you will learn about the Endangered Species Act, an environmental law that protects endangered species. You will also discover how the ESA works and how species are protected under it. Finally, you will learn how a World Conservation Strategy can help endangered and threatened species worldwide.

Glaciation: Definition, Periods & Causes

13. Glaciation: Definition, Periods & Causes

In this lesson, we explore glaciation. Referring to the movement and formation of glaciers, glaciation has played an important role in human history, including allowing for the implementation of one of humanity's most important practices.

Sporangium: Definition & Function

14. Sporangium: Definition & Function

For non-mobile organisms, like plants, reproduction can be a bit tricky. Two plants cannot come together to mate. Instead, they have to find different ways in which to reproduce. One such way is with spores.

Temperate Deciduous Forests: Climate & Examples

15. Temperate Deciduous Forests: Climate & Examples

This lesson will explore the unique characteristics of the temperate deciduous forest biome. The lesson will also discuss animals and plants that can be found in this biome and the adaptations they have developed to ensure survival.

The History of Environmental Science in America

16. The History of Environmental Science in America

In this lesson, you will travel through time to the mid 1800's, where the science of ecology began, through to America, where a book sparked a movement in environmental preservation and conservation that developed into the environmental science of today.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
Not Taken
Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
Not Taken

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Other Chapters

Other chapters within the AP Environmental Science: Help and Review course

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