Unit 3/midterm

What does the law of conservation state?

• Energy can only be created.

• Energy can only be destroyed

• Energy cannot be created or destroyed.

• Energy can both be created and destroyed.

What energy transformation takes place when you turn on a lamp?

• chemical - radiant

• electrical - heat + light

• mechanical - light + heat

• light- heat + electrical

What process heats up the inside of a building or car on a warm, sunny day?

• sunshine

• greenhouse effect

• energy budget

What is potential energy?

• energy from movement

• stored energy

What is kinetic energy?

• stored energy

• energy from movement

How does the sun cause currents in the ocean?

• It provides energy by reflecting light off the surface of it.

• It cools the ocean waters causing evaporation to occur rapidly.

• heats the atmosphere which generates winds that create ocean surface currents.

What items have mechanical energy?

• fan, vacuum, ceiling fan, car

• oven, computer, fridge

• ball, lamp, tuba

What does the tilt of the Earth cause?

• seasons

• cold weather

• day and night

• months

What is the middle of an atom called?

• neutron

• proton

• electron

• nucleus

How much of the Earth’s energy budget is reflected back?

• 20%

• 6%

• 4%

• 30%