ENERGY

the ability to do work is......

What is the source of energy of all life forms?

When an alarm clock rings in the morning, it produces a form of energy. Which type of energy is it?

• Light energy

• Sound energy

• Electrical energy

• Heat energy

Which of the following is an example of light energy?

• A burning candle

• A glowing light bulb

• A heating stove

• A ringing bell

When you listen to music through speakers, the energy involved is primarily:

• Sound energy

• Light energy

• Electrical energy

• Sound energy

When you place your hand near a warm lightbulb, you feel heat. What type of energy is transferred from the bulb to your hand?

• Light energy

• Heat energy

• Sound energy

• Mechanical energy

Light travels away from a light source in a straight line.

• True

• False

Reflection happens when a light bounces off a surface.

• True

• False

Smooth surfaces bounces light off in all directions.

• False

• True

Rough surfaces reflect light in one direction only.

• True

• False