Energy Transformations: Unveiling the Power Within

The transfer of heat energy by heat traveling through a metal is known as

• Conduction
• Convection
• Radiation
• Reflection

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Heat travels through liquids by

• Conduction
• Convection 
• Radiation 
• Reflection

Heat may be transferred through a vacuum by

• Conduction
• Convection 
• Radiation
• Reflection

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A toaster browns bread by converting

• electric energy to heat energy. 
•  heat energy to electric energy. 
• mechanical energy to heat energy. 
• chemical energy to electric energy.

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Heat energy transferred by conduction will travel best through

• solids
• liquids
• gases
• a vacuum

Which is the best heat conductor?

• air
• iron
• wood
• glass

When solar energy is transmitted through space to the earth, the process by which it is transferred is

• convection
• conduction
• deduction
• radiation 

A person sitting in front of a fireplace feels what type of heat energy?

• convection energy
• conduction energy
• solar energy
• radiation energy

Thermal (heat) energy always flows from

• gas to a liquid. 
• a liquid to a solid. 
• a warmer region to a cooler region. 
• a freezing material to a boiling material. 

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It is possible to pour a mile long stretch of concrete when building a highway, but it is NOT done. Contractors pour a series of short sections with spaces called joints separating the sections. This is done to

• provide space for the concrete to expand during hot weather. 
• provide space for the concrete to contract during hot weather. 
• give rain water a place to drain off of the road surface during bad weather. 
• make the road easier to replace since only small sections will need to be done at one time. 

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