CK-12 Foundation
Ck 12: Life Science: Succession
[Free Registration/Login may be required to access all resource tools.] Ecosystems are "dynamic." This means that ecosystems change over time. Both natural forces and human actions cause ecosystems to change. Learn more about succession...
Soft Schools
Soft Schools: Biodiversity Quiz (Ecological Problems)
Take an interactive quiz over ecological problems affecting the environment. After completing the quiz, check your score, and then revisit any incorrect question for further review.
TED Talks
Ted: Ted Ed: Why Wildfires Are Necessary
Our early ancestors relied on lightning to cause forest fires, from which they could collect coals and burning sticks to help them cook food and clear land. Yet, it wasn't just humans who benefited from these natural phenomena. Even as...
National Geographic
National Geographic: Ecosystem Imbalance in the World
In this lesson, students build on their knowledge of individual impacts on the ocean to see how the whole system can react to threats and changes. They examine ways in which human actions throw marine ecosystems out of balance, explore...
Scholastic
Scholastic: Study Jams! Science: Ecosystems: Changes in Ecosystems
A video and a short multiple-choice quiz on the natural changes that take place in an ecosystem, and the negative impact humans can have on ecosystems.