1. Density Bead Lab

2. Problem
Will adding salt affect the number of beads that float?

3. Procedure Add 10 plastic beads into a cup filled with 100mL of water
Stir beads for 1 minute with stir stick
Record the number of beads that float
Measure out 2 teaspoons of salt
Add the salt to the beads and water and stir for 1 minute with the stir stick
Record the number of beads that are floating.

4. Hypothesis
If salt is added to water then (Number between 0-10) beads will float.

5. Variables Type of water Number of floating beads
Independent Variable:
Dependent Variable:
Constants:
Number of floating beads
Tap Water, Stir stick, Graduated cylinder, Same type of beads, Timer, Salt, amount of water

6. Materials Stir stick 10 Beads 100mL Water 2 grams salt Timer
Graduated Cylinder
Cup

7. Procedure Add 10 plastic beads into a cup filled with 100mL of water
Stir beads for 1 minute with stir stick
Record the number of beads that float
Measure out 2 teaspoons of salt
Add the salt to the beads and water and stir for 1 minute with the stir stick
Record the number of beads that are floating.

8. (Independent Variable) Number of floating beads
Data
Type of Water
(Independent Variable)
Number of floating beads
(Dependent Variable)
No salt
Salt

9. Number of beads that float in different types of water
(Combination of the independent and Dependent Variables)
Number of beads that float in different types of water Y
Number of floating beads
(Y-Axis Dependent Variable) X
No Salt
Salt
Type of Water
(X-Axis Independent Variable)

10. Conclusion
My hypothesis was (accepted/Rejected) because salt water is more dense than water with no salt.