## Concept and Helping Material

◦ Forces: This section covers concepts such as forces and motion, including the ideas that forces make things move, can be balanced or unbalanced, and change the motion of objects. It also introduces friction as a force that slows objects down, and discusses that forces have size and direction.
◦ Magnets: Key concepts in this area include that magnets are attracted to metals with iron, attract and repel each other, and have a magnetic field.
◦ Gravity: This subbranch explores gravity as a force that holds us on Earth, Isaac Newton's idea about this force, the principle that everything has gravity, and how objects with more mass have a stronger pull of gravity. It also defines weight as a measure of the pull of gravity on an object.

Concept and Helping Material