Why read about it when you can watch it happen? Bird cams make it possible for learners to experience the life cycle of a bird in real time! An engaging set of lessons provides activities to connect their learning to bird cam...

If you teach a man to fish, he will never go hungry—or he will overfish and permanently damage the ecosystem? Address the traditional biomes as well as the human-included ecosystems and contrasts the biotic and abiotic factors in each....

What goes into a museum display? A secondary-level STEM project prompts groups to design a museum display for the Tech Museum of Innovation. They create an analogous, interactive model illustrating a science concept to complete the...

Instructional module focusing on the carbon cycle. Discussion includes the biological and geological components of how carbon moves through the atmosphere, lithosphere, and hydrosphere. Site also includes an interactive practice quiz and...

Overview of the basic concepts behind evolution, such as gene variation and adaptations.[Free Registration/Login may be required to access all resource tools.]

[Free Registration/Login may be required to access all resource tools.] Provides an overview of biological communities.

[Free Registration/Login may be required to access all resource tools.] Describes relationship between evolution and the geologic time scale.

Students review the study of living things and make connections back to Earth's systems. This unit focuses on how various species, grouped in populations and communities, work with the nonliving things around them to ensure survival.

[Free Registration/Login may be required to access all resource tools.] The briefest overview of human evolution.

[Free Registration/Login may be required to access all resource tools.] The briefest overview of human evolution.

[Free Registration/Login may be required to access all resource tools.] Variables that affect the rate of weathering.

[Free Registration/Login may be required to access all resource tools.] For life to evolve from simple single-celled organisms to many millions of species of prokaryotic species to simple eukaryotic species to all the protists, fungi,...

[Free Registration/Login may be required to access all resource tools.] Do you ever wonder why some birds are big like ostriches and some birds are small like robins? Or why a lion has a mane while a leopard has spots? In the 19th...

[Free Registration/Login may be required to access all resource tools.] How quickly is the human population growing? If we look at worldwide human population growth from 10,000 BCE through to today, our growth looks like exponential...

[Free Registration/Login may be required to access all resource tools.] It might seem like there is plenty of water on Earth, but that's not really the case. Water is a limited resource. That means that it is used faster than it is...

[Free Registration/Login may be required to access all resource tools.] The process of photosynthesis and its importance in life on earth, and examples of photosynthetic organisms.

[Free Registration/Login may be required to access all resource tools.] Humans could not live on Earth if it were not for protists. Why? Protists produce almost one-half of the oxygen on the planet, decompose and recycle nutrients that...