3.2 Describing Energy Transformations

A lamp plugged into an electrical outlet is turned on. The lightbulb in the lamp glows and gets hot. What energy transformations are taking place?

• Electrical energy to light energy and heat energy

• Chemical energy to electrical energy

• Mechanical energy to electrical energy

• Nuclear energy to heat energy

Self-Evaluation: How did you do? What can you explain to me about energy transformations?

What energy transformation occurs when a wind turbine generates electricity?

• Mechanical to Electrical

• Electrical to Chemical

• Chemical to Thermal

• Solar to Mechanical

In a hydroelectric dam, what is the primary energy transformation?

• Potential to Kinetic to Electrical

• Chemical to Mechanical to Electrical

• Thermal to Mechanical to Electrical

• Solar to Electrical to Mechanical

What energy transformation occurs when a solar panel generates electricity?

• Chemical to Electrical

• Mechanical to Thermal

• Thermal to Mechanical

• Solar to Electrical

In a coal-fired power plant, what is the primary energy transformation?

• Mechanical to Electrical to Chemical

• Chemical to Thermal to Electrical

• Electrical to Mechanical to Thermal

• Thermal to Chemical to Mechanical

Students build a circuit that has wires that connects a battery to a switch and a fan.

Which energy transformations happen when the students close the circuit and the blades of the fan begin to spin?

• Chemical to mechanical to electrical

• Electrical to chemical to mechanical

• Chemical to electrical to mechanical

• Mechanical to electrical to chemical

Tags

112.18.b.9.C

Which energy transformation happens when the blades are spinning as shown?

• Electrical to mechanical

• Chemical to electrical

• Mechanical to electrical

• Chemical to mechanical

Tags

112.18.b.9.C

A teacher rubbed a match against a piece of sandpaper. The match started to burn. Which statement best describes the energy changes that occurred?

• The chemical energy stored in the match changed to thermal energy and light energy

• The thermal energy stored in the match changed to light energy and chemical energy

• The light energy and thermal energy stored in the match changed to mechanical energy

• The light energy and thermal energy stored in the match changed to chemical energy

Tags

112.18.b.9.C

This appliance dries clothes primarily by converting -

• electrical energy to heat and mechanical energy

• mechanical energy to heat and electrical energy

• electrical energy to heat and light

• mechanical energy to heat and vaporization

Tags

112.18.b.9.C