Land Use Issues

All stars start with the fusion of hydrogen, but their life cycles vary greatly. The PBS 9-12 Space series introduces star life cycles and explains why they vary so much. Clear animations illustrate the pressure, fusion, collapsing, and...

Understand the reproduction and life cycle of a frog from mating through spawn, eggs, tadpoles, and growing legs to the final frog. Nice details.

First-time florists will be able to label the structures of simple and composite flowers after reading this handout and answering the comprehension questions. There are a couple of grammatical errors in the text, but the content is...

Explain the two-step process of photosynthesis to your high school biologists with a focus on the Calvin cycle. Using adorable animation, a video likens the cycle to a tiny, sustainable factory. Even though the enzyme-bird rubisco and...

The National Park Service has produced a high-quality presentation on the halibut population of Glacier Bay, Alaska. It takes the viewpoint of the marine biologists or rather, ichthyologists, who have been studying the adaptations,...

A video documenting the jellyfish's life cycle. Moon jelly polyps divide off tiny juvenile jellyfish called ephyra. The juveniles will grow into adults that will spawn. The offspring will settle to the bottom and grow into tiny polyps....

This is a large collection of resources on cycles of nature and the Earth. There is a constant exchange of the elements between air, earth, water, plants, and animals. Most biological processes wind up back where they started. These...

Students read a book about a frog and the stages of its life. They read the description cards given and work in groups to study all of the wells of the frog life cycle. Finally, students identify and interpret various slides and...

Dive into an exploration of the life cycles of coral reef fish with this short instructional video. Starting off as larvae floating in the oceans' currents, these little fish can travel thousands of miles, avoiding numerous hazards as...

This lesson focuses on the formation and life cycle of stars. Stars form when enough dust and gas clump together because of gravitational forces. Nuclear reactions release energy to keep the star hot. Some stars grow larger over time....