Energy

When you rub your hands together the heat is a produced by

• magnetism
• friction
• conduction
• insulation

A lazy student is moving things out of a garage.  He wants to move the box that will take the least effort to move.  Which box should he move?

• 7 kg
• 6 kg
• 3 kg
• 2 kg

When light is reflected off a smooth surface it will be

• a clearer image than on a bumpy surface
• a darker image than with a transparent surface
• a brighter image than with a transparent surface
• a larger image than on a bumpy surface

Insulators of thermal energy include

• styrofoam and plastic
• metal and paper
• glass and metal
• wood and glass

When light meets a surface and bounces off, that is called 

• reflection
• refraction
• absorption
• conduction

When an object is hit with a mallet, the vibration it creates makes

• a sound wave

• a reflection

• a current

• a convex surface

When light meets a convex surface, the image

• changes size

• remains the same

• is darker

• is brighter

Which circuit in the picture is considered a "CLOSED" circuit?

• left

• right

Which of the following would not affect a ball being hit in a baseball game?

• mechanical energy

• friction

• gravity

• magnetism

A device that makes electricity by using chemical reactions and storing energy until it is needed is called a(n)

• circuit

• battery

• insulator

• copper wire