ICP - Unit 13 Test

Heat transfer by convection occurs when

• electromagnetic waves travel from one place to another through a vacuum.
• electrons bump into other electrons.
• atoms give off heat in the form of electromagnetic waves.
• particles of a fluid move from place to place.
• none of the above

The reason you can hold your fingers beside (but not above) a candle flame without getting hurt is that

• hot air rises.
• air is a poor heat conductor.
• hot-air convection currents travel upwards.
• all of the above

Heat travels from the sun to Earth by

• conduction
• convection
• radiation
• insulation

Specific heat capacity is related to the amount of internal energy _____.

• transferred by one molecule
• transferred by one object
• needed to change the temperature of one gram of a substance one degree
• one molecule contains
• a specific object has

Which releases the most energy, 100 grams of 100°C water cooling to 50°C, or 100 grams of iron at 100°C cooling to 50°C? (The specific heat of iron is 0.50 J/g°C and water is 4.186 J/g°C)

• Iron
• Water
• Both

One end of a metal rod is put into a fire while a person holds the other end. Very quickly, the metal rod becomes too hot for the person to handle. By what method of heat transfer (conduction, convection, or radiation) did the heat travel through the rod?

• Conduction
• Convection
• Radiation

How is heat being transferred to the object?

• conduction
• convection
• radiation

How is heat being transferred through the object?

• conduction
• convection
• radiation

How is heat being transferred to the person?

• conduction
• convection
• radiation

The ______ of an object is a measure of the average kinetic energy of the particles in the object.

• heat
• temperature
• conductivity
• charge