Conservation of Energy

Higher efficiency appliances are better because they convert more of the electrical energy to mechanical energy without having a lot get converted to thermal.

• TRUE

• False

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-3

When your body takes the chemical energy in food and transforms it so you can move, what type of energy did it transform it into?

• potential energy

• nuclear energy

• mechanical energy

• radiant energy

Tags

NGSS.MS-LS1-7

A rubber band that is pulled back waiting to "fly" has what type of energy?

• chemical potential

• electrical potential

• gravitational potential

• elastic potential

When you turn on a lamp, electrical energy is converted to

• radiant energy

• sound energy

• chemical energy

• nuclear energy

In photosynthesis, radiant energy from the sun is converted to ________________ energy in the molecule glucose.

• nuclear

• kinetic

• chemical

• elastic

Tags

NGSS.MS-LS1-6

NGSS.MS-LS1-7

Waste energy after you run your lawnmower is given off in the form of

• chemical energy

• electrical energy

• mechanical energy

• thermal energy

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What is a force that opposes motion when two objects are in contact with each other called?

• applied force

• frictional force

• potential force

• thermal force

The law of Conservation of energy states that energy can be transformed from one form to another, but it cannot be _______ or ________

• transformed, or created

• divided or multiplied

• radiated or conducted

• created or destroyed

Most machines are not very efficient.  Energy is not really "lost" we instead say that the energy is not converted to a ______________ form.

• useable

• positive

• thermal

• frictional

Tags

NGSS.MS-PS3-4

If you swing a pendulum - where is the potential energy the highest?

• at the bottom of the swing

• at the top of the swing

• 1/2 way from the top to the bottom

• 3/4 of the way from the top

Tags

NGSS.MS-PS3-2