Preferably on that itsn't TOO messy and doesn't tak too long. For ages 10-15
2006-10-20 11:43:49 · 12 answers · asked by hurley Reys 2 in Science & Mathematics ➔ Chemistry
You could try the diet coke and mentos thing. Dump a tube of mentos into a 2 liter bottle of coke and it will fountain up. Do this one on the lawn obviously.
2006-10-20 11:45:53 · answer #1 · answered by cb 2 · 0⤊ 0⤋
Sure, I have a lot of them, but how do you put them in a letter like this, Anything worth while would take a picture or two. You might try writing to me then I might be able to send you a diagram. Whoa! I just thought of one you can do. It is an experiment in Inertia. You will need two eggs and a dish One of the eggs is Raw and the other one is hard boiled.
Spin both of them in the plate. The hard boiled Egg will spin longer, because the fluids in the Raw Egg will will cause the Raw egg to slow down faster due to the inertia of the liquids inside. This is a good way to tell the difference between a hard boiled egg and a Raw Egg.
It is the same force that pitches you forward when a car you are riding in stops suddenly. The Inertia of your body causes you to keep moving even though the car stops.
2006-10-20 11:49:57 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Trust me if you do this you will get top marks!
You would extract DNA!
First what you need is filter paper, strainer, a test tube or cup, stirring rod, a wax pencil meat tenderizer or contact lens solution, rubbing alcohol and an onion. What you do is chop up half an onion and put it in the blender add water 1 cup, soap (clear) half a cup, a teaspoon of salt, and blend. Mix for 4 minutes. Then drain the substance and add water so it comes out then put it into the test tube then using the stirring rod wet it and dip it into a bit of meat tenderizer and mix in the solution. Then add the rubbing alcohol and you'll see bubbles forming on a white structure which is DNA. You can search it just type in DNA extraction from plant cells. Good Luck!
2006-10-20 12:42:27 · answer #3 · answered by glance 3 · 0⤊ 0⤋
A simple project could be for you to make a pulse watch. Its way easy. All you need is a wad of clay and a toothpick. Roll the clay into a ball and place the toothpick in, enough though that its not scewering it. The place the side that doesn't have the toothpick sticking out of it onto your wrist. Hopefully, if you find the correct spot, the toothpick will move and bop around since your pulse spreads through the clay to the toothpick.
2006-10-20 12:18:17 · answer #4 · answered by Anonymous · 0⤊ 0⤋
you're able to do an test on how long it takes a flask with heat water to soften 3 person products of dry ice checklist the time of all 3 discover an wide-unfold in the previous have a hypothesis and make a end that would in all probability be an A- a good materials 3 products of Dry ice (sufficiently small to slot in to a plastic bottle or flask) A flask (or empty water bottle) and heat water interior the flask Its an consumer-friendly project that doesn't take greater suitable than 10 minutes to do desire it helped
2016-10-02 12:24:46 · answer #5 · answered by ? 4 · 0⤊ 0⤋
Materials:
Propane torch
Long(1.5f) stiff wire (a coat hanger would be perfect)
Deionized or distilled water in beaker
NaCl
Procedure:
Light the torch
Put the wite in the flame to show there is no color change of the flame
Dip the wire in the water and then in the flame to show no color
Add salt to the water, dip the wire in and then put it in the flame, give it about 5-7 seconds, you should see a bright red or orange flame
2006-10-20 17:02:46 · answer #6 · answered by Scooter_MacGyver 3 · 0⤊ 0⤋
Which melt the fastest, an ice or an ice with salt?
I think this is too easy for 10-15 though.
2006-10-20 11:50:54 · answer #7 · answered by Anonymous · 0⤊ 0⤋
Take liquids from around your house, tap water, vinegar, coke, sprite, pickle liquid, etc and measure the pH with a paper pH strip.
Characterize the liquids as acid, bases, neutral, etc.
Calculate the concentration of H+ or OH- via the pH formula.
2006-10-20 11:49:23 · answer #8 · answered by Dr. J. 6 · 0⤊ 0⤋
Putting a paracetemol in a bottle with a balloon over the neck and showing how it inflates all by itself. Great fun, but maybe a bit TOO simplistic...?
2006-10-20 11:53:18 · answer #9 · answered by swelwynemma 7 · 0⤊ 0⤋
I did this in school...
Buy some cheap goldfish that cost pennies at your local wal-mart (or other). Test to see which ones live longest under different conditions:
1. tap water
2. bottled/spring water
It works! I received an A for it ;)
Good luck.
2006-10-20 11:46:28 · answer #10 · answered by A 2 · 0⤊ 0⤋