Energy Transformation Review

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

What type of energy is created using this?

• chemical

• electrical

• mechanical

Batteries have _________ energy.

• mechanical

• thermal

• chemical

The sun gives off __________ energy.

• mechanical

• electrical

• radiant

A stretched rubber band has what type of energy?

• potential

• kinetic

The law of conservation of energy says that energy cannot be created or destroyed.

• False

• True

________ energy is also called heat energy.

• electrical

• mechanical

• thermal

Electrical devices have been designed to convert electrical energy to other useful forms of energy. Choose the device which converts electrical energy to kinetic energy.

• Picture A

• Picture B

• Picture C

• Picture D

Plants prepare their food by the process of photosynthesis with the help of sunlight. Choose the correct energy transformation that occurs in this process.

• Chemical energy is converted to sound energy

• Light energy is converted to kinetic energy

• Sound energy is converted to potential energy

• Light energy is converted to chemical energy

Which one of these devices converts light energy into electrical energy?

• Picture A

• Picture B

• Picture C

• Picture D