Friday TEST REVIEW for science

What is energy? Choose 2

• A form of plant

• The ability to do work

• The ability to create something

• The ability to cause motion or change

What are the 2 main types of energy?

• Potential

• Nuclear

• Light

• Kinetic

Which is the correct equation for work?

J= Joules(Work)

M = Meters(Distance)

N = Newton(weight)

• N = J x M

• M = J x N

• J = N x M

WHere does most of our energy come from?

• Light

• Moon

• Sun

• Fossil Fuels

Draw an Energy transformation diagram of Vaccum Cleaner.

Input -> Output

How efficient is this light bulb(in percentage pls!)

Takes in 400J

Gives 50J to heat energy

And 350J to Light energy

• 87.5%

• 78.2%

• 33.4%

• 12%

Which one is the equation for power?

s = seconds(time)

J = Joules(work)

W= Watts(power)

• J = S/W

• S = W/J

• W = J/S

Which one is the definition of the Law of Conservation

• Energy can be destroyed

• Energy cannot be transferred

• Energy cannot be destroyed but only transferred

• Energy cannot be transferred but only destroyed

Which transfer of heat does the sun get to us?

• Radiation

• Convection

• Conduction

What is a vaccum?