Water Tank
In class we did an experiment which demonstrated density. We had a tank filled with water in it. First we put a divider in the middle of the tank. One side had blue food coloring and salt. The other side had just yellow food coloring. When we took out the divider i predicted that the yellow would rise and the blue would sink. My prediction was extremely close, the yellow raised and the blue sank but there was also a green strip of water in between the two colors. The blue sank because it is more dense, food coloring and salt add density to the water. The yellow raised since it only had food coloring and it was less dense. Next we quartered the tank. We put red food coloring in the water. The red section of water contains food coloring and salt because we mixed the blue and yellow water and put some red food coloring in that. My hypothesis was that the colors would all mixed together. My hypothesis was wrong, what actually happen was that the yellow was on top than a thin line of green, next was red, than another thin shade of green and on bottom was the blue. Lastly we quartered the water tank again and salted it again. I predicted that the slimy green would sink with the blue. The slimy green went to the bottom, than it was blue than red and on top was the yellow.