How can egg float in saltwater

I really underestimated the knowledge of my students. I performed the experiment ahead of time, and everything worked out perfectly. Now, it was time to see if my students could get it to work out perfectly. There was one aspect of this lesson that I felt extremely confident about and that was my preparation. I wrote out everything that I planned to do for the lesson. I knew exactly what I was going to say.

I tested all of the materials before hand, including every single boiled egg and every drop of salt water. I did not want to chance anything going wrong with my preparation.

I went ahead and assigned the different groups ahead of time so I could separate the children that I felt may cause a disturbance. If I were to do this lesson again, I would have smaller groups maybe groups of 2 or 3 because the materials are inexpensive. As I introduced the lesson, the students seemed very anxious. I had already placed the materials on their desk so they were very curious about the experiment.

I was a little hesitant about placing the materials on their desk ahead of time, but everything worked out fine. I knew the class well enough to trust them. I introduced each material on their desk so there would be no question after the investigation had begun.

We went through each prediction question together and I allowed them time to make predictions within their groups. If I were to do this activity again, I would let each child have their own sheet to record their observations and predictions on.

After all predictions were made, I let the experimenting begin. I encouraged the students to talk with their group members about any questions they had. As they performed the experiment, they were to write their observations on the sheet provided.

While the children were investigating, I walked around to see what each group was discovering. During our colloquium, the students talked about all of the observations they recorded.

I am so glad the experiment worked correctly for all groups because they all had the same observations. Next time, I would write their observations on the board to make what they say seem a little more important. I had the students perform a creative drama that involved the reaction of an egg in salt water, an egg in fresh water, and an egg in both, together. The students really enjoyed the creative drama and the children seemed to grasp every concept that I wanted them to.

However, the next time I do a creative drama, I will have each group perform the drama at their table so every child can take part in the fun. At the end of this lesson, I felt confident that every child in the classroom understood the topic at hand. Third Grade Science for the Measurement of Density. Science Project on How to Float an Egg.

How to Calculate the Density of a Solution. Osmosis Egg Experiments. Brine Vs. Osmosis Science Activities for Kids. How to Calculate the Volume of an Egg. Density Experiments for Elementary. Why Rubber Floats in Water. They will carefully add their fresh water colored blue to their salt water colored red using a teaspoon.

The trick is that this has to be done very carefully, so that the two waters don't mix. Add the water by dribbling it along the side of the clear cup with a clean spoon. Students will write their predictions down about what they feel the egg will do when placed in the new mixture. Finally, we will gather again for a final colloquium to discuss what just happened and why it occurred. Assessment: Assessment of the students will occur in several different ways.

To begin, I listened and observed my students during class discussions and as they performed the experiment. I also looked at their predictions and factual recorded data to assess their understanding.

Several students also had the chance to perform a creative drama. One student was the egg placed in fresh water, another was the egg placed in salt water, and a third student was an egg placed in the fresh and salt water mixture. I also interviewed some students on their understanding of the scientific concepts.

Students study denisty by combining salt water and fresh water, and water and oil. It helps them to learn about density by comparing substances. When I started lab at Olgetree, my lab class was ending a unit on space and beginning a new unit on oceans and weather.

After talking with my lab teacher, we decided that a hands-on experiment about salt and fresh water would be an interesting way for the students to begin a discussion concerning the oceans. After researching several different experiments, I decided to introduce my students to "Egg Float". My biggest problem was deciding on an easy way to convey the concept of density to my students.

I found this very challenging, but decided that I could discuss density with them by using many examples. For example, cork, styrofoam, and ice are less denser than water, so they will float. The most disappointing part of this lesson occurred when the students were doing the experiment themselves.

I only tested two eggs the night before the lesson. However, I found out that every egg could have been tested because eggs seem to have different consistencies. As the children were in their groups and doing their experiments, it soon became noticeable that not all the eggs were doing as expected.

Some of the groups' eggs sank no matter what water solution they were placed in. This was very frustrating, and I wish that I would have had a back up plan.