Energy Quiz

When some properties of the material change but the identity of the matter don’t

It’s composition remains the same despite its molecules being rearranged

• Physical changes

• Chemical changes

• Motion changes

The molecular composition of the substance change entirely

Involve the formation of new substances

• Physical changes

• Chemical changes

• Motion changes

Affect only properties as shape and size

Freezing water, melting wax, boiling water are examples

Easily reversible and the original substance can be recovered

• Physical changes

• Chemical changes

• Motion changes

Involve the formation of new substances

Includes absorption or production of energy

Digestion of food, burning of coal, rusting are examples

Involve the formation of new substances

Original substance can not be recovered

• Physical changes

• Chemical changes

• Motion changes

When an object starts moving, stops, increasing its speed, slows down, turns, accelerate

• Physical changes

• Chemical changes

• Motion changes

_______ is the ability to change or produce changes in other objects, according to the International System units, it is measured in _________, but for food, it is measured in _________ and the electricity bills are measured in ______.

• Energy, Joules, Calories, Kilowatts

• Energy, Calories, Joules, Kilowatt hours.

• Energy, Joules, Calories, Kilowatt hours.

• Work, Joules, Calories, Kilowatt hours.

How many joules of energy does a full pizza give us?

1 cal = 4.184 J

Write your answer. Don't include the units, just the number

My electricity bill show that is spent 40 kWh this weekend. How many KiloJoules are?

1kWh= 3,600,000 J= 3,600 kJ

Write your answer. Don't include the units, just the number

________________is the type of energy an object has because of its motion; many of the forms of energy fall under this type of energy, such as mechanical energy, thermal energy, and radiant energy.

• Kinetic Energy

• Potential Energy

• Chemical Energy

• Electrical Energy

___________________ is the type of energy that is stored in an object; energy that an object has because of its position relative to other objects. (Example: pulled back rubber band)

• Kinetic Energy

• Potential Energy

• Solar Energy

• Mechanical Energy