Determine if the temperature of water has an impact on how much sugar the water can dissolve. Start off with a glass of cold water and add a teaspoon of sugar. Stir the water until the sugar is completely dissolved. Repeat the process by continuing to add sugar a teaspoon at a time. As soon as the sugar gathers at the bottom of the glass, you know the water is saturated and cannot dissolve any more sugar. Repeat the experiment using hot water. Comparing the results will show that hot water can dissolve more sugar than cold water. This is because the molecules in hot water are further apart which allows more sugar molecules to fit in the spaces.
This gravity-defying experiment can be done using a drinking glass and a piece of cardboard. Fill the glass to the top with water and cover the top with the piece of cardboard, making sure no air remains in the glass. Hold the cardboard in place and turn the glass upside down. Let go of the cardboard and it will stay in place instead of falling to the ground and spilling the water. This is because a vacuum has been created in the glass due to the air pressure on the outside being more than the air pressure inside the glass.
Fit an egg into a bottle where the opening is seemingly too narrow. Begin with an unshelled hard boiled egg, glass bottle, matches and piece of paper. Place a small piece of paper into the bottle. Light a match and toss it into the bottle. Put the egg onto the opening of the bottle and wait. The egg will be sucked into the bottle. This is because the carbon dioxide from the match creates pressure lower than that outside of the bottle. A vacuum is created, causing the egg to be sucked into the bottle.
Watch the colors spread across a dish in this fun experiment using a baking dish, food coloring, dish soap and milk. Fill the baking dish with milk and add a few drops of food coloring. Use a few different colors for added effect. Add a few drops of liquid dish soap into the center of the food coloring and watch the colors quickly spread across the dish. This happens because the hydrophobic molecules in the dish soap are trying to get away from the water contained in the milk. The only way they can do this is by moving on top of the food coloring, which means they need to spread across the dish, moving the colors around as they do so.