Forces and Materials

What is a force?

• A force is a type of wave

• A force is a type of energy

• A force is a form of matter

• A force is a push or pull.

Name 3 types of forces.

• Magnetic, Frictional and Pulling

• Static, Stopping, and Freezing

• Push, Pull, and Press

• Frictional, Gravitational, and Magnetic

What is friction?

• Friction is the stopping force that opposes motion.

• Friction is the force that accelerates motion.

• Friction is the force that causes objects to float.

• Friction is the force that attracts objects together.

How does friction affect the movement of objects?

• Friction reduces the speed and alters the direction of movement of objects.

• Friction has no effect on the movement of objects.

• Friction causes objects to float in the air.

• Friction increases the speed of movement of objects.

What is the law of gravity?

• Every object that goes up must come down, because of the strong pull from the center of the earth.

• Gravity is only applicable on Earth

• Gravity is a myth created by scientists

• Gravity is caused by the rotation of the Earth

Who discovered the law of gravity?

• Galileo Galilei

• Albert Einstein

• Isaac Newton

• Marie Curie

What are magnetic materials?

• Magnetic materials are substances that repel magnets.

• Magnetic materials are substances that can conduct electricity.

• Magnetic materials are substances that are transparent to light.

• Magnetic materials are substances that can be magnetized.

Give an example of a magnetic material.

• Iron

• Aluminum

• Copper

• Gold

How does a magnet attract objects?

• By releasing heat energy

• Through a magnetic field that exerts a force on ferromagnetic materials.

• By emitting sound waves

• Through gravitational pull

Name one effect of magnetism.

• Attraction or repulsion of magnetic materials

• Conduction of electricity

• Absorption of heat

• Reflection of light