February CBA Review

What is an advantage of power plants powered by natural gas when compared to coal and oil?

• Natural gas generates more electricity when burned.

• Burning natural gas releases less pollution to the atmosphere.

• Natural gas requires long pipelines to reach power plants.

• Explosions are less likely when leaks occur in pipelines.

During photosynthesis, plants convert-

• chemical energy into thermal energy

• radiant energy into chemical energy

• thermal energy into radiant energy

• mechanical energy into chemical energy

Thermal energy always moves from-

• large objects to small objects.

• dark objects to light objects.

• warm objects to cool objects.

• smooth objects to rough objects.

What type of heat transfer occurs when you touch a metal seat with your hand and the seat feels cold?

• radiation

• convection

• conduction

• transpiration

A student is standing with their back facing a campfire. The student notices that their back is much warmer than their chest. They know that thermal energy is being transferred from the fire and that this method of energy transfer can happen even if no air is present.

This method of energy transfer is-

• convection

• condensation

• conduction

• radiation

A student is investigating how thermal energy moves. The student heated a nail to 100 degrees Celsius and placed it into 250 mL of 20 degrees Celsius water.

Based on your experience, what will happen to the thermal energy of the water and the nail?

• The water will transfer energy to the nail until the water and nail have an equal temperature.

• The nail will transfer energy to the water until the water and nail have an equal temperature.

• The nail will transfer energy to the water and the nail maintains its original temperature.

• The water will transfer energy to the nail and the water maintains its original temperature.

Which statement best describes what is happening when water is thrown on a wood fire?

• The water transforms the thermal energy to chemical energy.

• The water causes a chemical change of the wood which reduces the fire.

• The water releases its thermal energy to the fire.

• The water absorbs the thermal energy of the fire.

Which statement best summarizes the relationship between thermal energy and particle movement?

• As the temperature decreases, the particles evaporate

• As the temperature increases, the particles move slower

• As the temperature decreases, the particles move faster

• As the temperature increases, the particles move faster

The graph shows the temperature change that occurs when an ice cube in a beaker (-2 degrees Celsius) melts to form water until the water reaches room temperature (20 degrees Celsius).

Which statement correctly describes thermal energy movement?

• Thermal energy in the room absorbs the cold from the ice cube.

• The ice cube absorbs thermal energy from the room.

• Thermal energy moves back and forth from the ice cube and the room.

• The ice cube gives thermal energy to the room.

Which model shows the direction thermal energy moves while an ice cube melts on a metal table?

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