Physical Science

Chapter 6: Thermal Energy

Self-Check Quiz.-Eng.

 1. The moving particles in an object have __________ energy. Need a Hint? A) potential B) increasing C) kinetic D) decreasing 2. __________ is a measure of the average kinetic energy of all the particles in an object. Need a Hint? A) Density B) Conduction C) Radiation D) Temperature 3. If the particles in an object begin to move more quickly, their average kinetic energy __________ and the object's temperature __________. Need a Hint? A) increases, falls B) increases, rises C) decreases, rises D) decreases, falls 4. Thermal energy is the __________ of the particles in a material. Need a Hint? A) average kinetic energy B) temperature C) total energy D) potential energy 5. __________ is the thermal energy that flows from a material with a higher temperature to one with a lower temperature. Need a Hint? A) Heat B) Work C) Kinetic energy D) Potential energy 6. The specific heat of a material is the amount of energy it takes to raise the temperature of __________ of the material __________. Need a Hint? A) 1 g, 1 Celsius B) 1 kg, 1 K C) 10 g, 10 K D) 100 kg, 100 K 7. Which of the following would be the best material to use for making tea kettles? Need a Hint? A) copper, specific heat 380 B) iron, specific heat 450 C) graphite, specific heat 710 D) aluminum, specific heat 920 8. What is the change in thermal energy of 1.9 kg of water that is brought to a boil from a temperature of 22ºC? Need a Hint? A) 171,764.2 J B) - 620,068.8 J C) 620,068.8 J D) -171,764.2J 9. If a 30-g silver coin cools from 40ºC to 20ºC, what is the change in its thermal energy? The specific heat of silver is 235 J/(kg/ K). Need a Hint? A) 141 J B) -423 J C) 423 J D) -141 J