Unit 3: Energy, Energy types and Energy Conversions

Which of these is an example of light energy being transformed into chemical energy?

• A glow stick lights up when broken.
• Water heated by the sun evaporates.
• A plant makes sugar in the sunlight.
• A battery causes a buzzer to vibrate.

Which kind of energy change occurs when a candle is burning?

• Chemical to light.
• Light to electrical.
• Solar to heat.
• Chemical to electrical.

Which of the following best describes the energy transformations that occur when a flashlight that runs on batteries is turned on?

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

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.

What energy transformation occurs in the chameleon as it quickly launches its tongue to catch an insect?

• Radiant --> Chemical

• Thermal --> Chemical

• Chemical --> Mechanical

• Mechanical --> Chemical

Which of the following devices transforms electrical energy into mechanical energy?

• An e-reader
• a fan
• a manual pencil sharpener
• ipod

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

• W
• X
• Y
• Z

What kind of energy is represented in this picture?

• Thermal
• Potential
• Nuclear
• Mechanical

According to the Law of Conservation of Energy, energy cannot be _________ or ____________. 

• destroyed, destroyed
• created, saved
• created, destroyed
• lost, found

What kind of energy is represented in the picture?

• Thermal
• Chemical
• Sound
• Nuclear