Energy Transformation and Law of Conservation of Energy

The light bulb converts electrical energy into light and _________.

• chemical

• electromagnetic

• heat

• nuclear

Tags

NGSS.MS-PS3-5

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-PS3-5

What is an example of multiple energy transformations?

• Your body transforms chemical to thermal

• Your body transforms chemical to mechanical

• a flashlight converts chemical energy in batteries to electrical to electromagnetic energy in light

• a phone converts electrical to electromagnetic

Which energy transformation below matches?
A book falling?

• chemical to sound and heat
• kinetic to sound and heat
• electrical to sound and heat

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-4

NGSS.MS-PS3-5

What energy transformations take place when a battery-operated radio is in use?

• Electrical to chemical to light
• Sound to chemical to mechanical
• Chemical to electrical to sound
• Light to electrical to thermal

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

NGSS.MS-PS1-2

The hand generator works by turning the handle which lights up the bulb. What energy transformation occurs as the handle is turned?

• Thermal to electrical

• Electrical to mechanical

• Mechanical to electrical to light

• Light to electrical

Tags

NGSS.MS-PS3-5

When a construction worker hits a hammer into plank of wood, the mechanical energy from the hit becomes _____ energy

• radiant
• electical
• heat and sound
• chemical

An iron heats up to iron clothes 

• eletrical to thermal energy
• potential to kinetic energy 
• potential energy to thermal energy 
• chemical energy to mechanical energy

Tags

NGSS.HS-PS3-4

According to the Law of Conservation of energy, the amount of energy before and after a reaction must be the same. Which statement below is true?

• The total amount of energy is conserved
• The total amount of energy is less after a reaction
• The total amount of energy is more after a reaction

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5