Forces Quiz - 3rd Quarter

Which of the following objects absorbs the most light?

• A mirror

• A fuzzy black jacket

• A shiny new dime

• A metal mailbox

A current is the flow of _____________________.

• an electron

• an insulator

• electrical energy

• a circuit

When an object blocks light, what happens?

• Shadows appear.

• Light is reflected back to the source.

• Some light is allowed to pass through.

• Most of the light is absorbed.

Which would not produce a sound?

• Knocking against a wooden table.

• Clapping your hands where there is no matter.

• Plucking a guitar string under water.

• Humming a song in the classroom.

How does sound energy travel?

• In a straight line that changes directions periodically

• In waves that move through the vacuum of empty space

• In a straight in one direction

• In waves that need a solid, liquid, or gas to carry them

What 2 things does gravity depend on?

• Mass and distance

• Mass and speed

• Distance and speed

• Distance and space

What does the the force of gravity do to objects?

• Makes them float

• Makes them jump

• Pushes them apart.

• Pulls them together

The ancient Greeks found some metallic rocks that attracted other metallic objects. They called them lodestones. This is an example of _____________.

• A natural magnet

• A south pole

• A non-metallic magnet

• A man-made magnet

A metal bar has an electrical charge. What will happen when it is brought near another metal bar with the same electrical charge?

• The two bars will be pulled toward each other.

• The two bars will touch and then remain connected with each other.

• The two bars will be pushed away from each other.

• The two bars will touch and move in circles around each other.

A force can ____________________.

• Make a ball roll.

• Make a ball stop moving.

• Slow a ball down.

• All of the above