Forces and Motion ENERGY IN MOTION l Force

Forces and Motion

ENERGY IN MOTION l Force l Wind l Gravity l Magnet l Motion

Force l Push or pull that can make something move

Push The force that makes something move away from you. Pull The force that makes something move towards you.

Motion l. Act of moving

Friction The rubbing force of one object against another. It causes moving objects to slow down.

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Examples of types of energy in motion.

Wind l. Moving air

Lever A bar that moves on a fixed point, like a balance. It is a machine that makes life easier.

Inclined Plane A sloping surface used to move heavy loads up or down, like a ramp. It is a machine that makes work easier.

MAGNET l Piece of iron or steel that attracts, or pulls, other objects made of iron and steel

GRAVITY l Force that pulls things toward the center of Earth

1. What causes motion? • forces • energy • friction • None of the above. 2. ______ is a force that slows down motion. • Energy • Speed • Friction • Distance 3. In order to successfully build a house of cards, the forces must be _____. • weak. • unbalanced. • strong. • balanced. 4. If a see-saw's _______ of gravity is in the middle and two people sit on opposite ends, it will be balanced. • center • middle • equidistance • midpoint 5. An object will continue to move in the same direction and at the same speed unless ____ acts to alter its movement. • gravity • friction • another object • All of the above.

When we finish this unit, we should know… l l l A kite is moved by ________. A _______ attracts iron objects. Abby will use a ______ to make something move. When a dog moves it is in ______. A ball rolls down a hill because of _____. Use one of these terms: gravity, force, motion, magnet, or wind.