1. By Miss LaStayo

2. Materials Needed

3. Will an egg float?
Take a minute to record in your science notebook your
predictions. When you are finished with your
prediction, move to the next slide.

4. Place your cup on a flat, sturdy
surface.

5. Pour water into the cup

6. Place the egg in the cup of
water

7. Take a moment to record your observations. Is the egg floating?
Think about what would happen if we changed the amount of
water in the cup…do you think the egg would float then? When
you are finished, move to the next slide.

8. Drain some of the water from the cup and observe.
Does the amount of water change the floatation of the
egg? Make notes in your science notebook.

9. Remove the egg from the glass. Think about
what we could do to make the egg float. List
your ideas in your notebook.

10. Get out your salt.

11. Pour some salt into the glass.
Do you think the salt will make
a difference?

12. Place the egg back in the glass
and record your observations.

13. Remove the egg again and pour a large
amount of salt into the cup (at least 6
tablespoons).

14. Stir the salt and water until the salt is completely
dissolved. Before moving to the next slide think about
what will happen when we put the egg in this new
mixture.

15. Place the egg back in the cup
and observe. The egg floats!

16. The egg is now floating at the top of the
cup. Record your observations and
move to the next slide.

17. Why did the egg finally
float?
 Think about what we have learned about
density in class and come up with a
theory as to why the egg floated when
put in salt water.
 Be specific in your explanation and use
the observations/data you have gained
from this experiment.
 Record your theory in your notebook.
Feel free to use drawings to help
support your ideas.