8th Physical Science TCAP review

Front

What is an electromagnet?

Back

An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. Unlike permanent magnets, electromagnets can be turned on and off.

Front

How do electromagnets differ from permanent magnets?

Back

Electromagnets can be turned on and off, while permanent magnets always have a magnetic field.

Front

What does a steeper slope on a distance-time graph indicate?

Back

A steeper slope indicates a faster constant speed.

Front

What is Newton's 3rd Law of Motion?

Back

For every action, there is an equal and opposite reaction.

Front

What causes a simple motor to spin?

Back

A simple motor spins due to the interaction of electricity and magnetic forces.

Front

What are microwaves used for?

Back

Microwaves are used in ovens and cell phone communications.

Front

What is the definition of speed?

Back

Speed is the distance traveled per unit of time.

Front

What is the difference between speed and velocity?

Back

Speed is a scalar quantity (only magnitude), while velocity is a vector quantity (magnitude and direction).

Front

What is the formula for calculating speed?

Back

Speed = Distance / Time.

Front

What are the three laws of motion proposed by Newton?

Back

1. An object at rest stays at rest, and an object in motion stays in motion unless acted upon by a force. 2. Force equals mass times acceleration (F=ma). 3. For every action, there is an equal and opposite reaction.