Sink Or Float - Density Activities For 3rd Grade (Lesson Plan Templates) (Page 2 of 2) in pdf

Sink Or Float - Density Activities For 3rd Grade (Lesson Plan Templates) Page 2

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Make paper boats using paper plates. Take two bowls and pour water in one and oil in the

other. Place the paper boat in water. As soon as it settles in water add sand slowly till it sinks.

Now place another paper boat of the same size and material in oil and add sand till it sinks in

oil. Drain the liquids using a filter so that sand will be collected and instruct the students to

note the amount of sand used each time.

Lesson Two

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Divide your students into three groups. Provide each with different liquids, like water,

vegetable oil and other liquids of different densities. Let them float a paper boat in the liquid

given to them and allow it to sink by adding sand into it. Let them note down their findings.

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Now take a large glass bowl and add each of the liquids one after another. Use a sufficient

amount of each liquid so that it forms a clear and distinct layer with enough thickness so that

children can distinctly make out each layer. Now place a paper boat and watch how it sinks in

each liquid column on adding sand. Once it is inside one liquid you can take the help of a straw

to put more sand into it without disturbing the liquid columns.

Analysis and Conclusion

From the recorded data children will understand that the paper boat sinks only when it becomes

heavier. Since the amount of sand in each case is different they will understand that the more

dense liquid can balance more weight and the less dense liquid balance less weight. Now go back

to the questions asked at the beginning of class and let your students find the answers.

Sink Or Float - Density Activities For 3rd Grade (Lesson Plan Templates) Page 2