This comprehensive study guide covers the key terms and basic concepts needed for an intro to science unit.

Do you like your strawberry jelly with or without the seeds? Are you glad to have a seed-free watermelon, or do you enjoy spitting the seeds into the garden? You might not like to find seeds in your fruit, but fruit is nature's way of...

[Free Registration/Login may be required to access all resource tools.] The theory of evolution by natural selection means that the inherited traits of a population change over time. Inherited traits are features that are passed from one...

[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.] An organism goes extinct when all of the members of a species die out and no more members remain. Extinctions are part of natural selection. Species often go extinct...

In this activity, students explore the idea of biodegradability by building and observing a model landfill. This serves as an introduction to the idea of composting. Students learn about the role of engineering in solid waste management.

Students practice a procedural skill -- knot tying -- to investigate if and in what way sleep affects learning and memory in relation to a learning a procedural skill. Sleeping is a behavior that is natural and essential for our health...