Grade 8-Term 2-Midterm Review

A compass needle’s magnetic north pole points toward which of the following?

• A) Earth’s magnetic south pole

• B) Earth’s magnetic north pole

• C) Earth’s magnetic axis

• D) Earth’s rotational axis

The location of the strongest magnetic field is the ____.

• A) center of the magnet

• B) magnetic domains

• C) magnetic field

• D) magnetic poles

Which of the following describes both an electromagnet and a permanent magnet?

• A) The poles can be reversed.

• B) The strength of the magnetic force can be controlled.

• C) The magnetic force can be turned off and on.

• D) It has a north pole and a south pole.

An electric field gets stronger as you ____.

• A) get closer to a charge

• B) get farther from a charge

• C) add negatively charged particles to a positively charged object

• D) remove negatively charged particles from a negatively charged object

Which statement best describes an electric current?

• A) Energy transfers inside of an electric device.

• B) Charged particles move through a conductor.

• C) Type of conductor or insulator.

• D) The measurement of the electric potential energy in a circuit.

Because of the magnetic field, magnets do have to touch to affect each other.

• True

• False

The strength of an electromagnet can be increased by reducing the number of turns on

the wire coil so that more current can flow.

• True

• False

The magnetic domains of a permanent magnet are arranged randomly.

• True

• False

A current-carrying wire produces a magnetic field.

• True

• False

The circuit in the diagram is closed, so charge particles travel through the wires and light the bulbs.

• True

• False