Changing Energy Forms by Lillian Duggan

What causes an electric charge to move along atoms?

• The rotation of the nucleus

• The movement of neutrons

• The flow of electrons

• The flow of protons

What is the difference between a series circuit and a parallel circuit?

• A series circuit uses less energy than a parallel circuit.

• In a series circuit, if one bulb is removed, the current will no longer flow. In a parallel circuit, the current can still flow.

• A parallel circuit can operate more devices than a series circuit.

• A series circuit has multiple paths for current to flow, while a parallel circuit has only one.

How can you make an electromagnet stronger?

• By decreasing the number of coils

• By using a smaller battery

• By adding more coils to the wire or putting iron into the coil

• By using a weaker electrical source

The law of conservation of energy states that whenever energy changes from one form to another, the total amount of energy does not change. How is this law related to a bouncing ball?

• The ball loses all its energy after the first bounce.

• The ball's kinetic energy is transferred to the air and the floor as heat and sound energy.

• The ball's energy is destroyed after it stops bouncing.

• The ball gains energy with each bounce.

Describe in order the energy changes that are involved in drinking a glass of orange juice, starting with the Sun.

• Mechanical energy, thermal energy, chemical energy

• Chemical energy, kinetic energy, thermal energy

• Nuclear energy, chemical energy, kinetic energy

• Radiant energy, chemical energy, kinetic and thermal energy

What is an electric current?

• A flow of electric charge in a material

• A static charge in a material

• A magnetic field around a wire

• A type of electrical insulator

What is the role of a generator?

• To store electrical energy

• To change kinetic energy into electrical energy

• To change electrical energy into mechanical energy

• To conduct electricity through a circuit

What happens when you break a magnet in half?

• Each piece becomes a non-magnet.

• One piece becomes a north pole and the other a south pole.

• You get two smaller magnets, each with a north and south pole.

• The magnetic field of the magnet is destroyed.

How does Earth act like a giant magnet?

• It has a magnetic field caused by the moon.

• It is surrounded by a magnetic field, similar to a bar magnet.

• It has a single magnetic pole at the North Pole.

• It generates electricity that creates a magnetic field.

What is kinetic energy?

• The energy stored inside the nucleus of an atom

• The energy of a moving object

• The energy due to an object's position

• The energy stored in the bonds of atoms