Energy Transformations Quiz

Susan is hot. She turns on the ceiling fan. The ceiling fan is powered by electricity, but the energy changes form. What form of energy does the electricity change to?

• sound

• motion

• thermal

• potential

Which of the following situations describes the use of a force?

• Pushing a box

• Lifting a weight

• Throwing a ball

Jim is pushing a box with five newtons of force. Alice starts pushing the box in the opposite direction with two newtons of force. Describe what happens to the box.

• together they move the box 8 newtons

• the box moves 2 newtons in Jim's direction

• the box doesn't move

• Jim moves the box 3 newtons in Alice direction

Tags

CCSS.7.EE.B.3

There are lots of ways one form of energy can be transformed into another form. Match the action with the correct energy transformation. Each action will match an energy transformation.

Actions: Kate lifts a bowling ball to the top of a slide.

• Motion to gravitational potential
• gravitational potential to motion

• motion to sound

• motion to light)

The ball begins to roll down the slide.

• motion to gravitational potential

• motion to light

• chemical to motion

• sound to light

The ball strikes the head of the nail which gets pounded into the piece of wood, heating the nail and wood a little .

• motion to gravitational potential

• motion to thermal

• chemical to motion

• sound to light

Andrea is playing soccer. When she is dribbling the ball she uses short, soft kicks. Each kick moves the ball a small distance. How does her kick change when she wants the ball to go a long distance quickly?

• she rolls the ball with her hands

• she kicks the ball gently

• she kicks the ball with more force

• she hits the ball with the side of her foot with less force

What is kinetic energy?

• energy in motion

• potential energy

• sound energy

• energy in space

What is needed for an object to start moving?

• potential energy

• chemical reaction

• friction

• force

Choose two sentences where forces are being subtracted.

• Dogs pulling a rope in different directions

• People working together to push a box

• A brother and sister lift a cart from the counter

• Two people arm wrestling to see who is stronger