Law of Conservation of Energy

 Which materials could be used to create an electric circuit?

• copper wire, wooden rod, and string
• string, light-bulb, and battery
• copper wire, light-bulb, and battery
• rubber tube, light-bulb,and  battery

Explain the energy transformation is a simple light electric circuit?

• chemical- electrical-  radiant
• electrical- radiant- chemical
• Thermal- radiant- chemical
• radiant- chemical- electrical

When electrical energy flows through a light-bulb it creates ___ 

• heat energy only
• heat and radiant energy
• radiant energy only
• motion energy

When you plug in an iron, electrical energy is transformed into ______ energy

• sound
• mechanical
• thermal (heat)
• radiant

When a construction worker hits a hammer into plank of wood, the mechanical energy from the hit becomes _____ energy

• radiant
• electical
• heat and sound
• chemical

At what point on the coaster would the potential energy be the greatest?

• 1
• 3
• 5
• 7

What which point on the coaster would the kinetic energy be the greatest?

• 3
• 2
• 5
• 4

What would happen if the electrical wire was cut?

• nothing, the light would still get energy
• the light would go out because the circuit is incomplete
• the battery will die
• the battery will explode

After using a flashlight on an overnight sleeping trip the flashlight stops working. Why?

•  You forgot to charge the flashlight.
• The electrical circuit in the flashlight was broken
• The bulb received too much energy from the  battery
• All of the energy from the battery was transformed into light and heat