Octopus, school gum and fly. Fun physical experience at home

ENTERTAINING EXPERIENCES AT HOME
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Octopus, school gum and fly. Physical experiments

Entertaining experiments in physics

Entertaining experiences at home / Physics experiments for children

Of the three items named in the title, the octopus is the least convenient for experiments. Firstly, it is difficult to get it, and secondly, jokes are bad with the octopus. How it grabs with its terrible tentacles, how it sucks with suction cups - you won’t tear it off! Zoologists say that the octopus sucker has the shape of a cup with a ring muscle. The octopus strains the muscle - the cup shrinks, it becomes narrower. And then, when this cup is pressed against the prey, the muscle relaxes.

Look how interesting: in order to hold prey, the octopus does not strain its muscles, but relaxes them! And still suckers stick. as if radish on a plate!

From experiments with a live octopus, you and I had to refuse. But we will still make one sucker. Artificial suction cup, from a school gum. Take a soft rubber band and make a hole in the middle of one side. This will be the suction cup. Well, we use your muscles. After all, they are only needed to squeeze the suction cup at first, and then they still relax, so that the hand can be removed.

Octopus, school gum and fly

Squeeze the elastic to make the cup smaller and press it against the plate. Just moisten it first: the gum is not a radish, it does not have its own juice. By the way, the octopus also "works" with wet suction cups. Pressed a rubber band? Now let go, she sucked securely.

There are also soap dishes with rubber suction cups. They stick to the tiled bathroom wall. They, too, must first be moistened, and then pressed against the wall and released. Hold on!

Octopus, school gum and fly

Well, now about the fly. Tell me, have you ever thought about how she walks on the wall and even on the ceiling? There is even such a riddle: "What is above us upside down?" Maybe the fly has claws at the ends of its legs? Hooks with which she clings to the uneven walls and ceiling? But after all, she walks completely freely on the window glass, and on the mirror. There's really nothing for a fly to catch on to. It turns out that the fly also has suction cups on its paws. So after that, assert that there is nothing in common between a fly and an octopus.

Author: Galpershtein L.Ya.

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