Q2 8th Grade Science Benchmark Review

Front

What are the poles of a magnet?

Back

The poles of a magnet are the regions where the magnetic force is strongest. Every magnet has a north pole and a south pole.

Front

What is an electromagnet?

Back

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

Front

Which star has the lowest temperature?

Back

Star C has the lowest temperature among the options provided.

Front

What is the energy transformation in an electrical generator?

Back

In an electrical generator, the energy transformation begins as mechanical energy and becomes electrical energy.

Front

What is electric charge?

Back

Electric charge is a property of matter that causes it to experience a force when placed in an electromagnetic field. It can be positive or negative.

Front

What is the difference between magnetic force and electric force?

Back

Magnetic force acts on moving charges and magnets, while electric force acts on stationary charges.

Front

What is the principle of electromagnetism?

Back

The principle of electromagnetism states that electric currents produce magnetic fields and that changing magnetic fields can induce electric currents.

Front

What is the role of a generator?

Back

A generator converts mechanical energy into electrical energy using electromagnetic induction.

Front

What is the relationship between electricity and magnetism?

Back

Electricity and magnetism are interrelated; a changing electric field produces a magnetic field and vice versa.

Front

What is noncontact force?

Back

A noncontact force is a force that acts on an object without physical contact, such as gravitational, magnetic, and electric forces.