Test 2.3 Transforming Energy/Scientists

Students built an electrical circuit like the one shown in the diagram. When the switch is closed, energy from the battery lights the bulb and evidence is provided that-

• only copper can be used for wires.

• energy can move from place to place.

• batteries will lose energy after time.

• the switch is not needed in the circuit.

Students are using a hand-held generator to produce light energy. The light only lights up when the handle is turned. What can the students do to change the amount of energy that enters the bulb?

• Place a filter over the light bulb.

• Turn the handle different speeds.

• Change the handle to a smaller one.

• Use a different bulb.

When the lamp is turned on and the bult is lit, is shows that electrical energy-

• Moves in a straight line.

• Is produced by moving water.

• Can be changed into light energy.

• Is the fastest moving form of eneregy.

Students found that a certain object was attracted to a magnet. This result means the students now know what about the objects? The students know-

• the length and width of the object.

• that the object could be made of iron.

• whether or not the object will float.

• the mass of the object in grams.

Which object is a conductor of heat?

• an aluminum nail

• a rubber band

• a tree

• a balloon

Peyton is making a trivet which something that is placed on a counter that hot pots can be set on. Which material does not allow heat to pass through?

• Wood

• Aluminum

• Copper

• Silicon

Which scientist is credited with inventing the first battery and the term volt, a unit of electric power?

• N. Tesla

• A. Volta

• T. Edison

• N. Holonyak

When light bulbs are attached to a battery by a wire, they light up as a result of what form of energy provided by the battery?

• Mechanical

• Electrical

• Solar

• Sound

Mike rides his bike to school every day. Which of the following observations provides the best evidence that Mike's bike is using energy?

• The bike has two wheels

• The bike is not very heavy

• The bike moves

• The bike is new

Kate is boiling water on the stove. Energy from the stove is transferred to the water to make it boil. What kind of energy is Kate using to boil the water?

• Thermal

• Electrical

• Sound

• Solar