Energy Quiz
Which is the best term to use when describing the energy of motion?
kinetic
Thermal energy is the energy associated with
temperature.
A welding torch produces a flame by burning acetylene fuel in the presence of oxygen. The energy released from the acetylene fuel is then used to melt a metal. Which energy transformation happens during this process?
Chemical energy turns into thermal energy.
According to the law of conservation of energy, what will most likely happen in a closed system?
Energy will be exchanged, but matter will not be exchanged.
Chemical energy in burning wood is changed into thermal energy. The thermal energy is absorbed by water, which boils to produce steam. The thermal energy is changed into kinetic energy in the moving steam. The kinetic energy is used to turn a turbine, which converts the kinetic energy into electricity. Which sentence best describes this system?
It involves both energy transformation and energy transfer.
Old photographic flashbulbs burn magnesium metal in a reaction that causes a flash of brilliant white light. A photographer would need to take care not to suffer burned fingers when trying to replace the hot bulb. What best identifies the energy transformation that occurs in the flashbulb?
chemical energy to electromagnetic energy and thermal energy
Which is the best example of potential energy?
holding a basketball in the air
A baseball player hits a ball. Which is the best description of the energy of the ball as it flies over the pitcher's head?
kinetic
When an object falls toward the ground due to gravity, what type of energy becomes kinetic energy?
potential
Which is the best term to use when describing the energy of position?
potential
