Energy Transformations

A lamp that plugs into a wall socket draws energy which flows through a thin wire in the bulb causing it to glow. What energy transformations are taking place?

• chemical → light → electrical
• mechanical → sound → light
• thermal → solar → electrical
• electrical → thermal → light

When water falls through a dam and turns a turbine connected to a generator, electricity is produced. This electricity is often used to light our homes and offices. Which of the following shows the energy transformations that occurs?

• electrical → light → mechanical
• chemical → mechanical → electrical
• mechanical → chemical → light
• mechanical → electrical → light

What is the energy transformation?

• Mechanical to Kinetic to Sound
• Mechanical to Electrical to Light
• Electrical to Thermal to Mechanical
• Kinetic to Sound to Potential

The Electrical Energy of the stove is transferred to _____ Energy.

• Solar
• Thermal
• Potential
• Electrical

Energy transformations occur when...

• energy is created through conduction
• energy changes from one form to another
• two forces slide together that are touching
• a chemical reaction takes place

Photosynthesis goes through two energy transformations. What are the transformations?

• radiant

  chemical

• chemical

  radiant

• electrical

  nuclear

• radiant

  sound

Some students observing a classroom device being used, noticed the below energy transformations. 
Electrical → Mechanical → Sound
Which device were the students most likely observing?

• A triple beam balance measuring an object’s mass.
• A pencil sharpener plugged into a wall outlet.
• A projector displaying a diagram on the screen.
• A working flashlight used to light up a dark corner.

A swing has potential energy if

• it is sitting still

• moving at a constant speed

• accelerating at a fast pace

• using multiple units of kinetic energy

The roller coaster cart has the most gravitational potential energy at position

• Z

• Y

• W

• X

On a rollercoaster, where is maximum kinetic energy?

• At the top of the big hill

• At the bottom of a big hill

• On the way up a big hill

• At the top of the hill ,where the car stops for a brief moment