Conservation Of Energy & Efficiency

The Law of Conservation of Energy states:

• Energy can created or destroyed but not transformed

• Energy cannot be created or destroyed, it can only transformed

• Energy can't be created, destroyed or transformed

• Energy cannot be created or destroyed.

Tags

NGSS.MS-PS3-5

What kind of energy does an object possess when it's resting on top of the hill?

• Potential Energy

• Chemical Energy

• Kinetic Energy

• All of the above

Tags

NGSS.MS-PS3-2

What do you need to add to kinetic energy in order to find an object’s mechanical energy?

• Initial Energy

• Gravitational Energy

• Thermal Energy

• Potential Energy

Tags

NGSS.MS-PS3-2

What force causes a roller coaster cart to slow down the most?

• friction

• weight

• gravity

• air resistance

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-5

What is the formula for Kinetic Energy?

• KE = mass x velocity

• KE= 1/2 x mass x velocity ²

• KE = mass x gravity x height

• KE = mass x velocity / 2

Tags

NGSS.MS-PS3-1

What energy transformation occurs from a light bulb? 

• Electrical energy = kinetic energy + potential energy 
• Electrical energy = electrical energy 
• Electrical energy = chemical energy 
• Electrical energy = light energy + thermal energy 

Tags

NGSS.HS-PS3-3

The law of energy conservation says the total energy before the change _______ the total energy after it

• is less than
• is more than
• affects
• equals

Tags

NGSS.HS-PS3-2

Which 2 letters have the most kinetic energy

• W & Y
• X & Z

Tags

NGSS.HS-PS3-2

Energy can be created.

• True
• False

Roller coasters slow down because their energy disappears.  

• True 
• False

Tags

NGSS.MS-PS3-5