SALT VS PEPPER Let static electricity do the

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SALT VS PEPPER Let static electricity do the work! (Physical science)

SALT VS PEPPER Let static electricity do the work! (Physical science)

QUESTION/PROBLEM What's the quickest way to separate salt and pepper with a plastic spoon?

QUESTION/PROBLEM What's the quickest way to separate salt and pepper with a plastic spoon?

HYPOTHESIS/GUESS Both salt and pepper will be attracted to the spoon, but only one

HYPOTHESIS/GUESS Both salt and pepper will be attracted to the spoon, but only one of them is lighter. The lighter one will stick to the spoon.

MATERIALS Salt Pepper Plastic Spoon Teaspoon Wool cloth or clothing

MATERIALS Salt Pepper Plastic Spoon Teaspoon Wool cloth or clothing

PLAN/PROCEDURE Help the student measure about a teaspoon of salt and a teaspoon of

PLAN/PROCEDURE Help the student measure about a teaspoon of salt and a teaspoon of pepper, then have her use the spoon to mix them together as well as she can. Ask her what she thinks is the best way to separate the salt from the pepper.

PLAN/PROCEDURE Have her rub the plastic spoon on a piece of wool cloth. Tell

PLAN/PROCEDURE Have her rub the plastic spoon on a piece of wool cloth. Tell her that as she rubs the spoon, she's giving the plastic spoon a negative charge. Something that's negatively charged will attract things that have a different charge. Have her hold the spoon about an inch above the pile of salt and pepper. What will happen? ?

VARIABLES Constants : � One teaspoon of salt � One teaspoon of pepper. Independent:

VARIABLES Constants : � One teaspoon of salt � One teaspoon of pepper. Independent: �A pile of mixed salt and pepper. Dependent: � Pepper was attracted to the spoon, because the pepper is lighter than the salt.

RESULTS/DATA/EVIDENCE Pepper was attracted to the spoon, and the pepper is lighter than the

RESULTS/DATA/EVIDENCE Pepper was attracted to the spoon, and the pepper is lighter than the salt. Therefore, the pepper jumped up and cling to the spoon!

CONCLUSIONS NEW QUESTIONS Both salt and pepper were attracted to the spoon. Pepper is

CONCLUSIONS NEW QUESTIONS Both salt and pepper were attracted to the spoon. Pepper is lighter than the salt. Therefore, the pepper jumped up and cling to the spoon! Is there any other way to separate salt and pepper besides the spoon?