Energy Transformations

People get energy from the food that they eat and transform that energy as they move. Which energy transformations occur as a student rapidly rubs the palms of his hands together?

• mechanical to thermal to electrical
• chemical to mechanical to thermal
• mechanical to chemical to sound
• chemical to sound to electrical

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Which of the following would be an example of the following energy transformation:

Electrical -> Mechanical -> Sound

• A triple beam balance measuring an object’s mass

• A pencil sharpener plugged into a wall outlet

• A projector displaying a diagram on the screen

• A working flashlight used to light up a dark corner

The picture shows a lamp. Which three forms of energy is the lamp using?

• heat, light, and sound

• electrical, light, and heat

• mechanical, sound, and light

• light, mechanical, and electrical

Tags

NGSS.MS-PS3-3

The blades of a wind turbine are at rest until the movement of air causes the blades to spin. Which energy transformation happens when the blades are spinning as shown?

• Electrical to mechanical

• Chemical to electrical

• Mechanical to electrical

• Chemical to mechanical

Tags

NGSS.MS-PS3-5

The diagram below represents energy transformations in a moving electric toy car. Which form of energy is the original source of power for this car?

• electrical

• mechanical

• sound

• radiant

The picture shows a woman running. What is the main type of energy conversion taking place?

• Thermal energy is converted to mechanical energy as the energy from heat provides energy for movement.

• Mechanical energy is converted to thermal energy as the energy from movement creates heat in the surrounding air.

• Chemical energy is converted to mechanical energy as the energy from digested food provides energy for movement.

• Mechanical energy is converted to chemical energy as the movement from movement creates reactions in the surrounding air.

Tags

NGSS.MS-PS3-5

As a candle burns, the chemical energy stored in the wax is transformed into

• heat and light

• heat and magnetism

• electricity and light

• electricity and magnetism

Tags

NGSS.MS-PS3-3

A wrecking ball is a tool that is used to tear down unsafe houses or buildings. A heavy ball is hung from a crane and swings into the side of a structure, crushing the walls. What type of energy does the wrecking ball use to destroy the walls?

• chemical energy

• heat energy

• magnetic energy

• mechanical energy

Tags

NGSS.MS-PS2-1

NGSS.MS-PS3-1

NGSS.MS-PS3-5

Which of the following is NOT an example of sound energy?

• 
• 
• 
• 

Tags

NGSS.MS-PS4-2

The picture shows a microwave oven. As a microwave oven is operated, electrical energy is transformed into all of the following types of energy EXCEPT —

• chemical

• radiant

• thermal

• mechanical