[Free Registration/Login may be required to access all resource tools.] This resource gives the definition of force and provides examples. It also describes how forces combine and affect motion.

[Free Registration/Login may be required to access all resource tools.] Discusses different forms of energy and how energy changes form.

[Free Registration/Login may be required to access all resource tools.] Presents an overview of the major animals groups (mammals, birds, reptiles, amphibians, fish, arthropods, vertebrates, invertebrates, those having live births and...

Dionysus is a Greek God. and a theater director. Help him get ready for the play and learn about land, water, and air. After completing this lesson, students should be able to identify the different materials Earth is made up from (land,...

[Free Registration/Login may be required to access all resource tools.] Covers reversible and nonreversible changes.

Test your knowledge of forces with this quiz that covers the basic concepts.

Test your knowledge of velocity and acceleration with this short quiz.

Nanook wants to learn to cook. In order to cook, she first needs to learn how things can change when they are heated or cooled.