Science class for 2nd grade / The human skeleton

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We must explain to the child that, although there are millions of human beings on earth, none of them looks exactly like another. We do not have the same color of skin, hair, eyes, we have different heights and weight.

The members of a family do not look alike. Everyone has something different. Now we notice that we all have the same things: a head, two arms, two legs.

That is why the presentation of the skeleton in the first stage of education must be directed, thanks to it, we stop, walk, run, dance, thanks to the bones that support our body.

Some bones are long, others are flat, small and round. The solidity of our bones protects us from blows and organs that are very delicate.

The skull protects the brain, ribs and sternum protect the heart and lungs. If we did not have bones, we could not stand and we could not write.

Bones grow up to 20 years of age, after their growth stops, that is why older people do not grow.

Beware, they can break!

The bones are solid, but they can break. Then we say that the bone has fractured. Therefore, we must be careful and avoid accidents.

How to make the skeleton?

Materials:

3 cans or large water drums

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2 medium cans

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16 cans of soda

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1 stick of broom or cane

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1 wooden bar

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cloves, hammer

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20 disposable spoons

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white and black paint, brush, wire and a clamp.

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How to do:

[Photo taken in education magazine]

1. Make the hole in the center of the base of the large drums, to pass the broomstick (one of them also makes a hole on both sides at the top). To perforate also, the base of the middle cans, so that the bar passes, but this time to the side. Drill the bases of the small cans, to pass the piolina.
2. Cut two cans of soda in half (they will be used for hands and feet).
3. Paint all cans black.
4. Begin to assemble the skeleton by inserting the stick through the drums. The drum with a hole in the sides goes in the middle of the three. Support the structure by nailing some nails on the stick.
5. pass through the rod, through the middle drum and add one of the medium cans on each side (the rod should protrude a little from the cans).
6. To perform, the legs threading, 2 groups of 4 cans plus 1 and a half and hang them from the base of the drum. The arms are made, threading 2 groups of 3 cans plus 1 and a half and collaglas of the protruding rod.
7. Pierce the spoons. Join them in groups of five. Present each group in one hand or one foot.
8. Once the structure is assembled, with white paint draw the different bones, from the front and the back. guided by the model. The head, sternum, ribs and hips, respectively, will be drawn on large cans or cans. The medium cans represent the shoulder blades. In the cans of soda you draw the bones of the arms and legs. The spoons are the bones of the fingers. Paint the bones with white paint.

Activity to do at home

Trim and arm the skeleton

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