Lets revise

An example of a natural light source is

• the moon

• a candle

• the sun

• a torch

Mirrors work by

• Absorbing the light

• Refracting the light

• Reflecting the light

• Letting the light through

How do we see an object?

• Light reflects off the object and into our eyes.

• Light travels from our eyes and reflects off the object

• Light reflects off our eyes and enters the object

• The object produces its own light

The bouncing of light off an object is ....

• a mirror
• absorption
• reflection
• refraction

Light is a kind of.....

• reflection
• energy
• heat
• matter

The property of light by which it travels in a straight line is known as

• Rectilinear propagation of light

• lateral inversion

• Circular motion

• random motion

smaller branches in lungs

• pharynx

• epiglottis

• bronchioles

• alveoli

2 tubes entering the lungs

• pharynx

• larynx

• bronchus

• bronchioles

exchange of gases

• bronchus

• alveoli

• larynx

• pharynx

________ is the tube that connects the larynx to the lungs.

• alveoli

• larynx

• pharynx

• trachea