Eye, Ear, Light and Sound quiz

The Ear and Sound Study Guide

You need to be able to fill out the parts of the ear.

Sound is vibrations that travel in waves.

The reason you feel dizzy after spinning for a period of time is that your brain is confused. It is receiving two messages from your body. One- your semi-circular canals have liquid in them that continues to move after you stop which tells your brain that you are still moving. Two- your legs tell your brain that you have stopped moving. You become dizzy and may fall.

There are many ways to keep your ears healthy. Some of them are…

• Let a doctor remove your earwax when necessary.
• Don’t listen to loud noises for long periods of time.
• Wear hearing protectors like ear plugs or ear muffs if you are going to be around loud noises.
• Don’t ever place sharp things into your ears.

The Light and Eye Study Guide

Know these definitions:

- Refract: to bend
- Reflect: to bounce back
- Transparent: You can see clearly through it and light can pass through it. (A window, eye glass lens, glass, water.)
- Translucent: You can not see clearly through it, you can see shadows of objects. Light can pass through it. (Most colored glass or glass with a design, fluorescent light covers, some shades, gauzy curtains).
- Opaque: You can not see through it. No light can pass through it. (Person, car, tree, wall, desk, chair.)
- Convex: curved outward- Larger view, used in stores to see around corners. Used in microscopes.
- Concave: curved inward- smaller view, objects appear upside down. Used in telescopes.

Know this information:

• - Light travels in a straight line.
• - Light is energy.
• -We can only see things when light hits an object and bounces off it. The light from the object then travels through our pupils which creates an upside-down image on our retina. The image then travels on the optic nerve to the brain, where it is turned right side up again.
• - Dark objects absorb more light than light colored objects. This is why dark clothing is hotter in the summer. It is collecting more energy from the light.
• -When light is blocked by an opaque object, a shadow of the object is formed.
• -White light is made up of a spectrum of colors (all the colors of the rainbow).