When liquids are weightless, they form a sphere. Make a sphere of oil inside a beaker of water and alcohol.
Countries: CA
-
Weightlessness
In order to feel your weight, you have to feel the earth pushing against you. If you are accelerating toward the earth at a rate equal to the force of gravity, then you are weightless. These demonstrations illustrate this point nicely.
-
The Electric Pencil
Build a simple electric circuit using a penicl stroke on a piece of paper to conduct the current.
-
Spitting Sparks
Salt water and acids both conduct electricity. So what about saliva, which is both salty and acidic?
-
Barrel Roll Science
It’s race time, and the Which will roll down a hill faster – an enpty barrel, or a barrel filled with a hockey player? Explore the science of rotating objects – the concept known as ‘moment of inertia’.
-
Liquid Pressure
Hydraulics are based upon the transmission of forces through liquids. Because liquids are virtually incompressible, they readily transmit and even magnify forces, which can lead to some fun demonstrations!
-
Making Butter
One of the simplest food science activities is one of the best. Transform cream into butter!
-
How Does a Toilet Flush?
A simple model of a toilet tank illustrates how it flushes with no mechanical parts other than a flap.
-
Bubbles Under Pressure
What causes bubbles to form in carbonated beverages? Obviously it’s carbon dioxide, but why do bubbles form rapidly (or even explosively!) sometimes, while other times the bubbles are under control?
-
Burning Water
Make acetylene the old fashioned way – using carbide and water – and set the water on fire!