Pearson Elevate Science Grade 3 Forces and Magnetism

A ________________ is a push or a pull.

• force

• equation

• distance

_____________ is a force that goes against the motion of an object.

• Friction

• Gravity

• Electricity

___________ is the force that acts between any two objects that pulls them toward one another.

• Gravity

• Magnetism

• Electricity

_____________ is a noncontact force that can either attract or repel other objects.

• Electricity

• Magnetism

• Gravity

A ______________ is a simple machine that uses contact forces. It is a wheel with edges that stick out, called cogs.

• gear

• lever

A naturally magnetized mineral magnetite, called __________, was used as the first compass. It could turn an iron needle into a magnet, which would always point North. This enabled navigation.

• Lodestone, which means "way, journey, course"

• Diamond, which means "brilliant"

When you think like a scientist, you make observations using your senses to see, hear, feel, smell, and taste. From these observations, you can make guesses, predictions, and conclusions. These are called ____________________.

• inferences

• forces

• conductors

When matter has an overall positive charge or a negative charge, it has _________________ charge.

• an electric

• a neutral

If the number of positive and negative charges are equal to each other, the matter has no electric charge. It is ________.

• neutral

• a source

• an insulator

• True

• False