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Running Time:
00:03:53
Join Exploratorium educator Ken Finn as he unlocks the mystery behind the black sand (a.k.a. magnetite) at Ocean Beach. This piece explores the origin of magnetite in the Sierra Nevada mountains, its journey down the Sacramento and San Joaquin rivers to the Bay, and the interesting physical properties of this mineral, plus some fun things you can do with it.

Project: Science in the City | Browse All

Date: August 9, 2011
Format: Expedition
Category: Everyday Science
Subject(s): General Science
Running Time:
00:04:48
Sarah Santos and Jeremy Rector demonstrate two ways to make ferrofluid during a live Webcast of the Exploratorium's Iron Science Teacher. Watch the whole episode (type "oil" in the search box), along with many other episodes of Iron Science Teacher at www.exploratorium.edu/tv

Project: Iron Science Teacher | Browse All

Date: July 10, 2009
Format: Demonstration / Activity
Category: Everyday Science
Subject(s): Geology/Earth Science, Physics
Running Time:
00:00:40
An introduction to the stripped-down motor, a simple and easy-to-make version of the electric motors found in toys, tools, and appliances.

Project: AfterSchool Activities | Browse All

Date: January 14, 2008
Format: Demonstration / Activity
Category: Everyday Science
Subject(s): General Science
Running Time:
00:01:16
A detailed description of the simple materials needed to make a stripped-down motor.

Project: AfterSchool Activities | Browse All

Date: January 14, 2008
Format: Demonstration / Activity
Category: Everyday Science
Subject(s): General Science
Running Time:
00:02:48
A step-by-step demonstration of how to make the stand for the stripped-down motor.

Project: AfterSchool Activities | Browse All

Date: January 14, 2008
Format: Demonstration / Activity
Category: Everyday Science
Subject(s): General Science
Running Time:
00:05:16
A step-by-step demonstration of how to make the coil for the stripped-down motor.

Project: AfterSchool Activities | Browse All

Date: January 14, 2008
Format: Demonstration / Activity
Category: Everyday Science
Subject(s): General Science
Running Time:
00:01:41
How the stripped-down motor works, including a discussion of how electricity and magnetism combine to drive the machine.

Project: AfterSchool Activities | Browse All

Date: January 14, 2008
Format: Demonstration / Activity
Category: Everyday Science
Subject(s): General Science
Running Time:
00:01:26
Troubleshooting tips for making sure your stripped-down motor works well.

Project: AfterSchool Activities | Browse All

Date: January 14, 2008
Format: Demonstration / Activity
Category: Everyday Science
Subject(s): General Science
Running Time:
00:01:29
A more detailed explanation of how the stripped-down motor works.

Project: AfterSchool Activities | Browse All

Date: January 14, 2008
Format: Demonstration / Activity
Category: Everyday Science
Subject(s): General Science
Running Time:
1:04:33
Watch as the best teachers on the planet battle it out for the title of Iron Science Teacher. In this zany competition teachers will have ten minutes to create a science activity. This week’s “secret” ingredient: corks!

Project: Iron Science Teacher | Browse All

Date: June 23, 2000
Format: Demonstration / Activity
Category: Everyday Science
Subject(s): General Science