Energy Test 2 Review

The light bulb transfers electrical energy into light. What is one type of energy that is also generated that is NOT a desired effect? (6.P.3A.3)

• heat

• mechanical

• sound

Jenna built a completed electrical circuit. Jenna's circuit illustrates what energy transformation? (6-3A.3)

• Electrical energy decreases over time.

• Electrical energy does not affect heat or light.

• Electrical energy can be transformed only into light.

• Electrical energy can be transformed into both heat and light.

In an electromagnet, as the electrons flow through the wire, _______ is generated around the iron core. (6-3A.4)

• a convection current

• a magnetic field

• elastic potential energy

• gravitational potential energy

Frank wants to make a simple electromagnet. Which of these does Frank need to have to create the electromagnet? (6-3A.4)

• battery

• wood

• aluminum foil

• light bulb

What type of circuit allows the electricity to flow from the power source to the transformer and then back to the power source? (6.P.3A.3)

• open circuit

• closed circuit

• parallel circuit

• none of the above

An electrical motor changes electrical energy to _______ energy. (6.P.3A.4)

• light energy

• mechanical energy

• chemical energy

• nuclear energy

Electrical appliances convert the electrical energy from the power company into different forms. When turned on and plugged in to complete the electric circuit, which of the following appliances would change electrical energy into mechanical energy? (6-3A.3)

• a light bulb

• an oven

• a blender

• a refrigerator

Renaldo and Nasreen build an electromagnet by wrapping a wire around a nail and connecting the wire to both terminals of a battery. When they test the electromagnet, it can pick up 6 paper clips. Their teacher wants all groups to pick up at least 10 paper clips. What could Renaldo and Nasreen do to increase the number of paper clips their electromagnet picks up? (6.P.3A.4)

• makes the wire longer

• remove the nail from the center of the wire

• increase the number of loops around the nail

• spread the loops of wire apart on the nail so they do not touch

When a television is turned on it converts electrical energy into many other forms of energy. Which set of words correctly lists MOST of these forms? (6-3A.3)

• sound and heat

• sound and light

• light, sound, and heat

• light, sound, and electricity

Suppose you connect a wire from the positive to negative terminal of a battery. Once this circuit is connected, all of the following items are put next to the wire, which one of them moves? (6.P.3A.4)

• compass needle

• a petri dish full of water

• small piece of aluminum foil

• a battery placed in the opposite direction