Year 8 Science - Energy

What is energy transformation?

• a change of energy from one form to another
• when energy gets more energy added to it
• when energy gets destroyed
• a change in intensity

Any object that rises and falls experiences a change in:

• gravitational potential energy & kinetic energy
• release of energy
• size
• color

Whenever a moving object experiences friction, some of its kinetic energy is turned to...

• mechanical energy
• potential energy
• thermal energy
• light energy

Through the process of photosynthesis which takes place in plants, solar energy from the sun is changed to stored ______ energy.

• chemical
• electrical
• mechanical
• thermal

According to the Law of Conservation of Energy...

• energy changes form
• energy can be created and destroyed
• energy flows from one material to the next
• energy cannot be created or destroyed

Which of the following energy transformations occur when a lamp that is plugged into a wall socket is functioning correctly?

• Chemical to light
• Electrical to chemical
• Electrical to light
• Chemical to electrical

What energy transformations take place when a battery-operated radio is in use?

• Electrical to chemical to light
• Sound to chemical to mechanical
• Chemical to electrical to sound
• Light to electrical to thermal

Turning on a lamp is an example of energy transformation from electrical to 3 forms of energy. Which of these is NOT created by the lamp?

• radiant
• light
• heat
• chemical

In energy transformations, "wasted energy" usually takes what form?

• heat
• chemical energy
• light
• sound waves

On a roller coaster, where is maximum kinetic energy?

• At the bottom of a big hill
• When going around a corner
• When going upside down
• At the top of a big hill