Science 4th grade | UNIT 1: Humans and animals 1.1 skeletons
Sometimes skeletons look scary. Skeletons are not scary. People, and many animals, have a skeleton inside their bodies. A skeleton is a hard, strong frame that supports our bodies from the inside.
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What are skeletons made of?
Skeletons are made of bone. Bone is very hard and strong.
You can feel the bones of your skeleton through your skin.
Activity 1.1 (Finding your bones)
Feel your head. How many skull bones can you feel?
Hold your hands on the sides of your chest. Can you find your ribs?
How many ribs can you feel?
Now feel your back. The bumps you can feel are the bones of your spine. These bones are called vertebrae. One bone is called a vertebra.
Stand up and put your hands on your hips. Can you feel your hip bones?
Feel your hand bones. Why do you think there are so many bones in your hand?
Did all the bones in your hand feel the same size and shape?
Questions
1) What are skeletons made of?
2) Why must skeletons be hard and strong?
3) Why do you think the bones of your skeleton are different shapes and sizes?
4) Bones are not very heavy. How do you think this helps animals?
5) Draw a picture of what you think a person without a skeleton might look like.
