PS Energy

Which of the following energy transformations occur when a lamp that is plugged into a wall socket is functioning correctly?

• Chemical to light
• Electrical to chemical
• Electrical to light
• Chemical to electrical

The diagram shows a complete circuit with a battery and a buzzer making noise. This circuit works by transforming -

• chemical energy to electrical to sound.
• electrical energy to thermal to light.
• sound energy to electrical to chemical.
• mechanical energy to electrical to sound.

Which of the following shows the correct order of the energy transformations that occur when green plants produce their food from the Sun’s energy?

• chemical to thermal
• light to chemical
• thermal to light
• chemical to electrical

The law of conservation of energy states...

• energy is hot 
• energy cannot be created or destroyed
• energy is electrical
• energy is work

Marcos has a new toy. When he plugs it in and turns it on, a marble iscarried up 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 and light energy
• electrical energy turns into potential energy into chemical energy
• electrical energy turns into potential energy into kinetic energy
• electrical energy turns into kinetic energy into solar energy

What is the metric unit that force is measured in?

• watt
• newton
• amp
• centimeters

What is the mathematical formula to calculate work?

• Work = force x time
• Work = force x resistance 
• Work = force x distance
• Work = force x joules

What is the energy  that depends on speed and mass?

• Energy
• Kinetic energy
• Potential energy
• Chemical energy

What is the energy depends on weight and height?

• Energy
• Kinetic energy
• Potential energy
• Sound energy

At which point is potential energy greatest

• W
• X
• Y
• Z