Forces and Energy

When I see my reflection in a mirror, I am using which type of energy?

• Mechanical
• Electrical
• Light
• Thermal

If I want to change a liquid to a gas, I need to - 

• remove thermal energy
• add thermal energy
• do nothing; it happens automatically
• add mechanical energy

Electrical circuits are comprised of a power source, wires, a load and a switch.  What physical property of the wire makes it function?

• solubility
• density
• conductivity
• magnetism

In order to generate electricity, something has to turn the turbine which powers a generator.  What type of energy would be needed to turn the turbine?

• Light
• Mechanical
• Sound
• Electrical

What behavior of light do the arrows in the picture show?

• Transmission
• Reflection
• Absorption
• Refraction

A car runs on gasoline and also uses a battery.  The battery powers the lights, windshield wipers, radio etc., while the gasoline allows the engine to function.  If the battery is allowed to run down, what is one thing that could happen?

• The radio will play louder
• The windshield wipers will work better.
• The power windows will not work
• The brakes will be better

An electric hot plate creates thermal energy for cooking.  What type of energy powers the hot plate?

• Mechanical
• Electrical
• Light
• Thermal

A girl sees her reflection in a lake while she also sees a rope tied to a boat that looks bent in the water.  What behaviors of light is she observing?

• her face is reflection and the rope is refraction.
• her face is refraction and the rope is reflection.
• both are reflection.
• both are refraction

A student wants to test the effect of a force on an object.  He changes the surface type of the ramp and rolls different cars down the ramp one at a time.  What is wrong with his experiment?

• He has too many hypotheses
• He has too many variables
• He has too many cars
• He has too many ramps

Under what conditions can electricity flow successfully through a circuit?

• When the circuit is closed and has a power source
• When the circuit has a power source and is open
• Any time you want it to, just flip the switch
• When the circuit is closed and has no power source.