Pressure

Marshmallows making funny faces

Marshmallows making funny faces With this experiment we'll cause marshmallows to make funny faces and demonstrate a scien-terrific principle called pressure. Draw a face on both ends of a large marshmallow (the flat end). Draw 'em to look like Dad if possible - it'll make the experiment much more humorous. Drop the marshmallow into a glass bottle. You'll have to make sure and use a bottle that has a opening slightly larger than the marshmallow. Take the straw and wrap the clay about 1 inch from the end in such a manner that the clay forms a 'ring' around the straw. Place the short end of the straw into the bottle. The clay should stop the straw from dropping all the way into the bottle.…
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Pressure

Extracting life from a plant

Extracting life from a plant Plants are living creatures just like Dad (OK, so plants are a little smarter). Plants need food and water just like people. But how do plants get food? Plants get their nutrients via the water they take in. Nutrients from the soil get mixed up with the ground water. The plant takes in the ground water with the sneaky nutrients concealed inside. OK Reeko, so how do plants take in water, I've never seen them slurping it up with a straw? This experiment should shed some light on this question. Fill the bottle with water. Take a freshly cut leaf or flower, wrap clay around the stem and place the stem into the bottle. Make sure the clay fits snugly…
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Pressure

A sucker’s bet – atmospheric pressure experiment

A sucker's bet Funny how we take every-day activities for granted. Take for instance - sucking through a straw. Have you ever stopped to think about how we are able to suck liquids through a straw. What exactly makes the liquid climb up the straw and into our mouths. Well, I know you're just itching to know so here we Fill the jar with water. Poke a hole in the lid just big enough for the straw to fit through. Put the straw through the hole. Seal the hole with clay. Make sure it is sealed tight! Try to suck water through the straw. What happens? When you drink from an open glass of water, air pressure allows the water to travel up the straw.…
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Floatation

The homemade pen cap sinker

Make a pen cap sinker to demonstrate Pascal’s law Fill the plastic bottle with water. Attach a piece of clay to the arm of a plastic pen cap. Put the cap in the bottle so that it floats. Put the lid on the bottle and tighten so that it does not leak any air. Squeeze the sides of the bottle. What do you think causes the pen cap to sink when you squeeze the sides of the bottle? By squeezing the bottle, you increase the pressure inside, thus forcing more water up into the pen cap. The added water in the cap increases its weight and causes the cap to sink. A submarine works along these same principles. If the average density of the submarine…
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Floatation

Principles of Flotation science experiment

What makes a heavy ship float? How does a boat or ship carrying hundreds of pounds worth of stuff float while that same stuff would sink to the bottom of the ocean if dumped overboard? How come when you're in a pool and you stretch your body out flat you float. But, if you wrap your arms around your legs and curl up into a ball you sink? Well, it all has to do with how much water is pushing against you and a little scientific principle called buoyancy or floatation. When you stretch out flat more water pushes against you since your body is laid out flatter. When you curl up into a ball, less water is pushing against you. Want to test this…
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