Grade 8, Topic 2, Lesson 1 Only

What can happen to electrons between atoms?

• They can be gained, lost, or shared
• They can only be gained
• They can only be lost
• They remain unchanged

What happens when like charges interact with each other?

• They attract each other.
• They repel each other.
• They have no effect on each other.
• They combine to form a neutral charge.

How does electric force act between objects?

• It requires direct contact between objects.
• It acts at a distance, without objects having to touch.
• It only acts when objects are moving.
• It only acts in a vacuum.

What is an electric field?

• A visible region around a charged object where an electric force can be felt.
• The invisible region around a charged object where an electric force can be felt.
• A region where magnetic forces are stronger than electric forces.
• A field that only exists in the presence of a magnetic field.

Where is the electric field strongest?

• The speed at which a positive charge moves.
• The direction a positive charge would move.
• The mass of a positive charge.
• The temperature change of a positive charge.

What is a magnet?

• An object that produces a magnetic field and attracts certain metals like iron, nickel, and cobalt.
• A device that stores electrical energy.
• A tool used to measure temperature.
• A material that conducts electricity.

Which of the following is related to the motion of electrons in atoms?

• Magnetism
• Photosynthesis
• Evaporation
• Condensation

Where is magnetism strongest in a magnet?

• At the poles of a magnet
• In the center of a magnet
• At the edges of a magnet
• On the surface of a magnet

What is the definition of magnetic force?

• The energy stored in a magnetic field.
• The push or pull a magnet exerts on another magnet, or on certain metals.
• The ability of a magnet to conduct electricity on certain metals.
• The heat generated by a magnet when electricity is conducted.

What happens when the north pole of one magnet is brought close to the south pole of another magnet?

• They attract each other.
• They repel each other.
• They have no effect on each other.
• They create a spark.