For part of our "Vision" theme, we talked about how eyes look, and how the way they look tells us something about what they do.
-- We looked at pictures of different animal eyes (I had printed them off the computer and cut some from our monthly zoo mailing). Some animals have big, round eyes with very round and large pupils.
-- Other animals have almond-shaped eyes with smaller, or even horizontal, pupils. Why is that?
Here's a very basic answer for young children: The huge, round pupils of nocturnal animals help them to gather more light. The long, flat pupils of animals like deer and horses give them better depth perception on rocky, uneven ground. Such pupils also help them to see more around them, such as a lion crouching in the grass.
-- Some animals who live underground or in caves have no eyes at all! Can your child think of an example? (Worms are animals without true eyes!)
Simple Activity:
After talking for a day or so about animal eyes and how we can tell the special things they can do by looking at them, I printed several pictures off the Internet and had Nora sort them by whether they belonged to Day-seeing or Night-seeing animals (diurnal or nocturnal animals!). She didn't find this activity difficult. It was a concrete way for her to evaluate the things we had been talking about. Plus, it's just cool to look at all those different animal eyes!
There are so many other aspects of vision that could be taught...but due to my young audience, I kept it simple.
Additional Resources:
The Weird and Wonderful World of Animal Eyes (terrific photos!)
A to Z's Cool Homeschool: Eye Activities
Source: http://funprojectsforpreschoolers.blogspot.com/2010/08/science-lessons-eyes-made-for-day-and.html
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