MY BLOG

Sunday, February 28, 2010

Liquids can float and sink just as solid objects can. It all depends on something called " density." A substance with a lower density weighs less than the same volume of one with a higher density. An object or liquid will float only in a liquid more dense than itself.



You will need: Colored Water, Syrup, Vegetable Oil, Large Container, Selection of objects to float.



1. Carefully pour syrup into the container until it is a quarter full. It is easier if you pour the syrup over the back of a spoon.

2. Slowly pour the same amount of vegetable oil into the container. Then add the same amount of colored water.






3. The three liquids seperate into three layers and float on each other. Now add the objects you plan to float.







4. The objects float at different levels. They sink until they reach a liquid of a higher density than themselves. They float on that liquid.



Water is more dense than the oil but less dense than the syrup.








Science Behind It

Science Standards

Mini Lesson

16 comments:

  1. Good job! Would the temperature of the water change the density of the water.

    ReplyDelete
  2. Great job! Maybe you could try light karo syrup for it to see it better. Good presentation!

    ReplyDelete
  3. Good Job. This would be a good experiment to test the denisty of objects.

    ReplyDelete
  4. I wonder if the light Karo syrup would work for this experiment? Great job.

    ReplyDelete
  5. Great way to test the density of objects! This would be fun in the classroom and to use different objects and decide which ones are most dense. You then could explain why you think that object is dense or not dense.

    ReplyDelete
  6. You could use the light karo syrup and maybe see better. That is a really cool and easy experiment. Great job!!

    ReplyDelete
  7. Great Job! This is a neat experiment to see different objects float at different levels. Is there any other kinds of liquids that could be used, such as honey?

    ReplyDelete
  8. Great job! I agree that the color of the syrup affects how well you can see the objects, so a lighter color would work better. I think students would enjoy this experiment and guessing whether each object would sink or float in each liquid :)

    ReplyDelete
  9. Great explaination! You might could try Kayro syrup....it is much lighter than the pancake syrup but might be a little thicker. I don't know if that would have anything to do with it.

    ReplyDelete
  10. Great observation about the color of the syrup being important. I liked that you had great pictures and this would be fun in the classroom. Great job. Using different objects would be interesting.

    ReplyDelete
  11. This is a great denisty test!! I wonder if you use different objects if they would float better in the different levels? I think students would have fun with this experiment. Great job!

    ReplyDelete
  12. I think this would be a great experiment to introduce density to a classroom! It would be fun and very educaitonal. It would allow the students to conversate about other objects that would float and/or sink and why.. Great job!!

    ReplyDelete
  13. Great Job! I wonder if it would matter what temperature the water is with this experiment.I also wonder if there is a difference between the types of syrup that could be used.

    ReplyDelete
  14. It would be fun to have students vote on whether they think an object would sink or float. Great presentation and blog post!

    ReplyDelete
  15. Nice pictures. I liked how you said it would be a good experiment to use in the classroom. Did it matter which objects you trid to float?

    ReplyDelete