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Age of the Earth, Solar System and Universe

Age of the Earth, Solar System and Universe. Solar System: 4.6 billion years old Earth: 4.5 billion years old Universe: 13.8 billion years. Radioactive Decay. The decay of radioactive elements into other elements Mass gets released as energy. Radiometric Dating.

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Age of the Earth, Solar System and Universe

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  1. Age of the Earth, Solar System and Universe • Solar System: 4.6 billion years old • Earth: 4.5 billion years old • Universe: 13.8 billion years

  2. Radioactive Decay • The decay of radioactive elements into other elements • Mass gets released as energy

  3. Radiometric Dating • Uses the rate of decay of certain elements to date rock and other objects

  4. Half-Life • The time it takes for an element to decay by half

  5. Evidence for the age of the Earth • Dating rocks • Dating meteorites • Dating lunar rocks

  6. Measuring the Solar System • Astronomical Unit (AU) • The distance from the Earth to the Sun • 149,600,000 km (92,957,130 miles)

  7. Measuring the Universe • Parsec: 8 trillion miles • Used to measure the distance to stars • 206,265 AU

  8. Speed of Light • Speed of light • 186,282 miles/second • 670,615,200 mph • Light Year: the distance light can travel in one year • 5.9 trillion miles • Proxima Centauri : 4.2 ly

  9. History of the Universe in 10 minutes • https://www.youtube.com/watch?v=wXLfbfsidp4

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