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Newton's Law of Universal Gravitation
Sir Isaac Newton’s law of inertia states an object will continue to move in a straight line unless acted on by another force. But then, how did this explain why the moon orbited the earth? What was the other force? Newton theorized the same force that caused an apple to fall from a tree was also the force that kept the moon in place. Over several years, Newton worked until he had developed the law of universal gravitation, which debuted in his book Mathematical Principles of Natural Philosophy (1869). This idea stood until the concepts of quantum theory and relativity were posed in the mid 19th century. Help your students understand the law of gravity with these classroom resources.
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Definitions in the Field: Matter
National Geographic Explorer Skylar Tibbits is a materials architect at MIT, so he knows a thing or two about matter. From solids to liquids to gases, everything on Earth is made of different states of matter—even you!
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Electromagnetism 101
Electromagnetism is one of the four fundamental forces of nature. Learn about the relationship between electricity and magnetism, the different wavelengths on the electromagnetic spectrum, and how an invisible force protects our entire planet.
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Case Study: California Blackouts
Learn how the state of California mitigated an energy crisis caused by a series of blackouts and developed an action plan to ensure the security of its energy future.
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Newton's Law of Universal Gravitation
Sir Isaac Newton’s law of inertia states an object will continue to move in a straight line unless acted on by another force. But then, how did this explain why the moon orbited the earth? What was the other force? Newton theorized the same force that caused an apple to fall from a tree was also the force that kept the moon in place. Over several years, Newton worked until he had developed the law of universal gravitation, which debuted in his book Mathematical Principles of Natural Philosophy (1869). This idea stood until the concepts of quantum theory and relativity were posed in the mid 19th century. Help your students understand the law of gravity with these classroom resources.
-
Definitions in the Field: Matter
National Geographic Explorer Skylar Tibbits is a materials architect at MIT, so he knows a thing or two about matter. From solids to liquids to gases, everything on Earth is made of different states of matter—even you!
-
Electromagnetism 101
Electromagnetism is one of the four fundamental forces of nature. Learn about the relationship between electricity and magnetism, the different wavelengths on the electromagnetic spectrum, and how an invisible force protects our entire planet.
-
Case Study: California Blackouts
Learn how the state of California mitigated an energy crisis caused by a series of blackouts and developed an action plan to ensure the security of its energy future.