Energy & Energy Transformations Pre-Test

When you plug a radio into the wall

• electrical energy turns into light energy

• electrical energy turns into sound energy

• chemical energy turns into electrical energy

• sound energy turns into light energy

Energy of motion is

• potential energy

• kinetic energy

• nuclear energy

• chemical energy

Stored energy is

• potential energy

• kinetic energy

• mechanical energy

• electrical energy

As electrical energy flows into a light bulb, some of that energy is converted into light energy, which we see as light. What other type of energy is produced by the light bulb?

• potential energy

• mechanical energy

• chemical energy

• heat energy

The blades of a toy helicopter will spin when a battery is connected to its wires. Where does the mechanical energy of the blades come from?

• chemical energy

• solar energy

• heat energy

• sound energy

Which of the following best describes energy transformations that take place in a CD player?

• electrical energy turns into kinetic energy and sound energy

• electrical energy turns into potential energy

• sound energy turns into electrical energy

• electrical energy turns into heat energy and light energy

What 2 factors affect kinetic energy?

• mass and weight

• mass and speed

• volume and density

• mass and length

What 2 factors affect potential energy?

• mass and weight

• mass and speed

• volume and density

• mass and height

Which of the following has the most kinetic energy?

• a loaded truck traveling at 35 km/h

• a bird flying at 35 km/h

• a small car traveling at 35 km/h

• all have the same amount of kinetic energy

Joel has a new toy. When he plugs it in and turns it on a marble is carried to the top of a slide. At the top the marble is released and it goes down the slide. What kind of energy transformation occurs in this toy?

• Electrical energy turns into sound energy, which turns into light energy

• Electrical energy turns into potential energy, which turns into chemical energy

• Electrical energy turns into mechanical energy, then potential energy, then kinetic energy

• Electrical energy turns into kinetic energy, which turns into chemical energy