Students learn about the concept of pushing, as well as the relationship between force and mass. Students practice measurement skills using pan scales and rulers to make predictions about mass and distance. A LEGO MINDSTORMS NXT robot is...

Students learn about contact stress and its applications in engineering. They are introduced to the concept of heavy loads, such as buildings, elephants, people and traffic, and learn how those heavy loads apply contact stress. Through...

This well-written explanation of relativity includes animations and pictures which may be helpful in understanding a tough topic.

Activity investigates weight and its relationship to gravity.

Understand the effect of the forces of push and pull on motion.

The greater the force applied to an object, the greater the change in speed or direction of the object.

Salt crystals demonstrate how forces can be directed in mechanical systems.

At this site students will use origami to fold a paper airplane that fly better than the classic dart airplane.

Describes the definition and relationships between force, work and power. Includes nice drawings to increase conceptual understanding.

Extensive site for teachers provides some helpful resources that pertain to plant and animal cells. Includes a microscope diagram as well as plant, animal and pond labs. Also contains links to structures and mechanisms, matter and...

Introduce students to the ideas of motion and force in this hands-on lesson plan.

Use science inquiry to predict and investigate forces and motion to help rescue Ruff's plushie from the penguins' ice rink in this sports science game.

Students can experiment at home with expanding balloons, dancing raisins, and pop cans that have been shaken up.

This lesson introduces the concept of the inclined plane. It is 2 of 2 in the series titled "Inclined Planes."

This site from PBS Kids "Zoom" provides great ideas for building a Rube Goldberg machine around the house from common items. The information is complete with materials needed, instructions, and results on a level for elementary kids.

What is work? Illustrated discussion of work and how it is measured.

What is friction? Illustrated discussion of friction including the three types, its importance, and why it is avoided.