Using water and oil along with some food coloring you can make a fascinating science project. The liquid lava lamp is easy to make and is a wonderful play thing for children in the primary classes. they can actually spend hours just shaking the bottle and watching the pretty colors and blobs change.

To make a liquid lava lamp you will need a clear plastic bottle. Any 500 ml plastic Pepsi bottle will do. Just make sure that you wash and clean it out before you use it for the experiment. Now get one cup of water and one cup of oil. Add a few drops of liquid food color to the water and mix well.

Get ready to make the liquid lava lamp. You will find it easier to pour the fluids into the bottle with a funnel. In case you do not have a funnel handy, just use some thick paper to make a temporary funnel. Now add both the oil and the colored water to the bottle. Seal the bottle with its cap and give it a shake. Now watch as the different colored blobs move in and out of the non colored bits.

In this case the oil is of a lower density than the water, so it will not dissolve into the water. Thus when you stop shaking the bottle the two layers will come apart with the oil on top and colored water below. Try out some more science projects from this page.

In the last blog post we saw how honey, oil and water can be made into a mixture but will eventually separate out thanks to the difference in the density of the three fluids. Just as liquids have different densities solids too have different densities, and in this science experiment we are going to explore the different densities of a few small solids in the same mixture bottle which we made last time.

Set the bottle with the honey, oil and water mixture before you and wait till the three fluids settle into three distinct layers. Next get your hands on a wine bottle cork, a small coin and a grape. One by one you will add these three solids into the liquid bottle. You will find that the different densities of the solids will ensure that they sink through some fluids but float in others. In fact each of the three solids will find their way in to each of the three separate fluid layers.

Another way to display the different densities of liquids is by using vinegar and oil. Both the fluids are different densities and the oil will always settle down on top of the vinegar layer. You can add them and mix them but as soon as you leave the bottle and allow it to stand still they will come to rest in two layers. Try more science projects here.

There is nothing a I find as much fun as mixing up things together to see what new thing can be made out of the mixture. Sand with water, or oil with vinegar, its fun to see mixtures being made. Here are a couple of mixtures that you will enjoy making and they illustrate scientific principles as well.

You will need a clear bottle in which to pour the liquids. A regular plastic cold drink bottle will work out just fine. Now take one cup or about 200 ml of honey and pour it into the bottle. Next add one cup of oil to the bottle. Last of all you can add one cup of water. Now wait for a while and you will see that the three fluids settle down in different layers in the bottle.

This happens because each of the levels is at a different density than its neighboring layers. The layer which is most dense will sink to the bottom, while the lightest layer will float on top. Look at the bottle and see which layer has gone down to the bottom and which one is floating on top? For more exciting science fun check out Awesome Science Projects.