Especially after the BP oil spill in the Gulf of jordan 7 Mexico, it is important for everyone to understand the significance of oil spills on marine life. Fill a container, such as a tub or bin, halfway with water and add a few drops of food coloring. jordan 12 Stir it well. Add a couple of small floating bath toys. Pour cooking oil into the water, though not directly on the toys. Stir the mixture. Notice that the oil floats to the top. If you stir some more, simulating waves, you will notice that the toys become coated in oil. This can greatly decrease mobility and cause suffocation in many marine creatures.

Anyone who is interested in the natural history of life on earth knows just how important the discovery of photosynthesis was to the eventual emergence of human beings. Understanding photosynthesis is thus to understand a pivotal point in history. Take two potted plants and place them on top of two glass sheets coated in petroleum jelly. Place a burning jordan 7 candle on one glass sheet alongside one of the plants. On the other sheet, place a dish containing caustic soda. Cover both plants with bell jars and leave for a few hours. You will find that the plant with the candle alongside it has starch on its leaves. It used the carbon dioxide produced by the burning candle to produce this starch, using photosynthesis. The other plant was unable to do this because the caustic soda deprived it of carbon dioxide.

This is likely the strangest substance students will ever come into contact with; call it mock quicksand or even “goop.” Create a mixture of cornstarch and water. Adjust the mixture until the substance feels sponge like yet still somewhat like a liquid. You will know when you get the mixture right because the substance will not behave the way you expect it to. This is why it is inadvisable to struggle when you are caught in quicksand; it will begin behaving like a solid and provide more resistance. Demonstrate its solid and liquid properties by rolling it into a rigid ball, then allowing it to melt off your hand when you stop rolling. You will also notice that while the substance looks as if it will splash when you hit it with your hand, in fact it will not. Allow onlookers to play with the substance. They might be amazed.