Energy Bellwork

A glow stick has an inner tube that sperates reactive substances. When cracked these mix together, react, and glow. Which of the following best describes the energies involved?

• kinetic energy transforms into light energy

• thermal energy transforms into light energy

• chemical energy transforms into light energy

• granitational energy transforms into light energy

Tags

NGSS.HS-PS1-4

Some power plants use coal to generate electricity. Which statement best descirbes the energy transformation that happens in a power plant.

• thermal energy from buring coal is converted to chemical energy

• mechanical energy from the turbine is converted to electric energy in the power lines

• electric energy from the generator is converted to chemical energy in the power lines

• chemical energy from the generator is converted to electric energy in the power lines

Tags

NGSS.HS-PS3-3

NGSS.HS-PS3-4

Students conducted an experiment in class using basketballs. They dropped a basketball from a height of 100cm and it bounced back to a 60cm. According to the law of conservation of energy, which is the best explaination of why the ball only bounced up 60cm.

• some energy was destroyed as the basketbal bounced

• friction caused some of the energy to disappear into the surroundings

• some of the energy was transferred to the basketball when it made contact with the ground

• some of the energy was transferred to the ground when it made contact with the basketball

Tags

NGSS.MS-PS3-5

Your phone is out of battery, you plug it in so you can listen to your music. Which best descibes how the phone is able to play music after being plugged in?

• the phone is able to play music because it is using up the electrical energy from the wall

• the electrical energy is transferred from the wall allowing the phone to make sound energy as music

• the phone is able to play music because the outlet is creating electrical energy thta is transformed to sound energy

• the electrical energy from the outlet is transfromed to chemical energy in the battery and then to sound and light energy as the phone plays music

Tags

NGSS.HS-PS3-2

NGSS.HS-PS3-3