| I want to give you three ideas here for elementary | | | | dispersed or spread out through a small room in a |
| science fair projects that can be easily done at home. | | | | period of time. Its easy to think of an experiment to |
| And best of all you probably won't have to buy any | | | | test this idea. |
| supplies for these projects since you likely will have | | | | 3) The third idea is to demonstrate a type of diffusion |
| them at your house already. | | | | called Osmosis that occurs in living cells. Osmosis is the |
| These project ideas are about the process of | | | | movement of liquids and dissolved substances into and |
| Diffusion. Don't be afraid of that strange sounding | | | | out of cells through a cell wall or membrane. We can |
| name because the process of diffusion is really very | | | | easily show this movement from an area of higher |
| easy to understand. It simply means that the atoms or | | | | concentration to one of lower concentration using plant |
| molecules (The stuff that makes up everything) of a | | | | cells. Osmosis is a very important principle in biology |
| substance are constantly moving and in certain | | | | and a simple project can show you how it happens. |
| situations can mix in or diffuse with those around them. | | | | Do some research and learn about the scientific |
| 1) The first idea for your elementary science fair | | | | principle of diffusion and how it works. This will make it |
| project is to design an experiment that would show if | | | | much easier to form an hypothesis (an idea you would |
| things diffuse differently depending on how hot or cold | | | | like to prove) for a project and to create a simple |
| they are. Will diffusion take place faster if the | | | | experiment to test it. Also read some about the |
| temperatures of the substances are higher? Will it go | | | | process of osmosis in plant cells and understand why |
| faster if the temperatures are lower? | | | | and how the movement of substances across cell |
| 2) The second idea is to test if molecules evaporating | | | | membranes occurs. |
| from a liquid will diffuse into the surrounding air and be | | | | |