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This website gives you the ingredients and amounts of different liquids and materials to poor into a clear cylinder to determine the different densities of materials. In their lab groups, the students will determine the order that the materials will layer in the cylinder before the materials are actually poured in. I selected this resource because it provides a way do demonstrate density in the classroom and it explains the reason for why each material settles differently. I would use this experiment as a way to introduce volume and density to my middle school students.

This is an experiment in which students will compare three different solutions that have different levels of salt. Students will use food coloring in order to visually see which solution is the most dense and which is the least dense. They will also see how the density of a liquid affects the objects in it. I chose this experiment because while teaching about density, this will allow my students to receive a visual understanding. I also like this experiment's website because it offers questions to think about and has real life application as it talks about rivers, oceans, and the Dead Sea.

This experiment, designed by ZOOM, is centered around density. Students will use everyday materials such as coins, grapes, and Legos, in an experiment to find out which is more dense. This experiment could get a little messy, because students will be placing the objects into syrup, oil, and water, to find density. I think this is an awesome activity to incorporate in the classroom. I think it is great when students are using everyday objects in experiments. I believe it sets them up to think scientifically outside of the science classroom.

When you drop an egg in a glass of plain water it sinks. If you drop the same egg in a glass of salt water, it floats. This experiment link explains this. If you start class with the two glasses and the eggs and just have students make observations you could really spark some interesting conversations. I would use this in part of a density lesson. This might even be my introduction to density. It is definitely a way to grab the students attention because you almost play a mind trick on them. As a student I know this would have really captured my interest, it also sparks more exploration. What else could you add to water to get the same results?

Salt water is denser than ordinary tap water, the denser the liquid the easier it is for an object to float in it. When you lower the egg into the liquid it drops through the normal tap water until it reaches the salty water, at this point the water is dense enough for the egg to float. I think this is a neat activity that kids would enjoy, and yet it requires very few supplies and clean up. I would first group students, giving each group a glass of freshwater and an egg. They would first put the egg in the freshwater only to see it sink to the bottom. They would record what they observed and possible reasons for why it sank. I would then give them another glass that is about half full along with a salt shaker. The students would be told to mix a lot of salt into the half cup and then slowly pour some of the freshwater into it. The egg is expected to float in this solution. The students would record their observations and possible explanations. This is a good way to start a lesson about density.