Listed below is a list of the students who participated and a description of their projects. A pulley is a simple machine that consists of a grooved wheel which is turned by a rope or belt. A fixed pulley makes work easier by changing the direction of the effort force. The balloon inflates when the bottle is in hot water because the air in the bottle gets hot. The hot air tried to get out of the bottle and went into the balloon.
Hot air takes up more space than cold air.
I found out that sugar crystals are formed in an oblong shape. A crystal is a solid form. The molasses, the water, and the oil did not mix. They formed layers of liquid. Molasses went to the bottom, the water stayed on top of the molasses, and the oil on top of the water.