Fourth Grade
Worksheets
Your Body
Look in a mirror. Your eyes let you see the world around you. What color are your eyes? The part of your eye that is colored is called the iris. In the middle of your iris, you see a black circle. That is the pupil of your eye. It is an opening that lets light come into your eye. You need light to see.
Listen. Your ears help you hear. Your ears hear many different sounds every day. Your ears also help you balance. All the working parts of your ears are hidden inside your head. Your ear drum is a special piece of skin. It vibrates when sound waves hit it. Your brain can tell what sounds made the vibrations.
Sniff. Your nose can smell about ten thousand different kinds of smells. Odors come into your nose with the air. At the back of your nose are thousands of tiny hairs. They are connected to a nerve that goes to your brain. When the smell comes into your nose, the nerves send a message to your brain. Then your brain tells you what the smell is.
