After
stumbling across a chemistry set today we discovered that Jimmy has
very little idea about science - so i feel a new project evolving!
we will try a series of small safe (!) experiments and we will film them and jimmy's reactions - could be fun!
Sensory Science
Instasnow(buy
from Hawkins Bazaar)- hold it in your hand and then add water. It gets warm as
it is an exothermic reaction.
Cornflour weirdness- Go here (there’s other stuff you might like too)
http://www.thenakedscientists.com/HTML/content/kitchenscience/exp/strange-cornflour-slime/
Lemonade and baking soda- Hold the glass and then feel it go cold when you add the bicarb.
This is an endothermic reaction and takes energy from the surroundings.
Collapsing can-Hold empty coke can with tongs. Put a little bit of water in and
then heat up (over gas cooker flame) until steam stops. Then QUICKLY plunge
into a bowl of cold water. The water pressure will cause the can to crumple as
air has been forced out.
Volcano-
Messy!!!
Knee reflex-
Hit just below the knee for the reflex reaction. This reaction allows us to
walk.
Hot cold hand – Go here
http://www.netplaces.com/kids-science-experiments/the-human-body/try-this-hot-and-cold.htm
Ankle-
Rotate right ankle in an anti clockwise direction. Now draw a figure of 8 in
the air with your right hand. Your ankle will change direction.
Chewing bread- Chew a piece of plain bread but don’t swallow. It will slowly
begin to taste sweeter as the enzymes in your saliva break the starch down into
glucose.
Digestion-
Kids love this and the banana smells disgusting. Takes a bit of prep but is
tactile. Get a banana, some weetabix and a little water. Mash together
(chewing), then put into a plastic zippy bag and seal. Massage bag (stomach).
Attach an old stocking leg with funnel attached at bottom, to corner of bag and
open a little so food passes into tights (small intestine) Smaller stuff comes
out (absorption) but bigger stuff stays in and passes down and out of the
funnel (excretion).
Fizzing –
Put a soluble disprin or similar into a glass of water. Feel the fizzing on
your cheek as the gas escapes from the liquid.
Static electricity- Rub a balloon on your hair or jumper and the static created will
stick the balloon to the wall.
Floppy egg –
Soak an egg in vinegar (takes a few days). The shell which is calcium carbonate
dissolves in the acidic vinegar and then you are left with the inside of the
egg. This will be messy if you handle it roughly!!
Sound – Put rice on a drum or speaker and
it will bounce from the vibrations.
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