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Meteors And Meteorites

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Presentation on theme: "Meteors And Meteorites"— Presentation transcript:

1 Meteors And Meteorites

2 Explain the difference between a meteor and meteorite.
Target 7 Explain the difference between a meteor and meteorite.

3 What is a Meteor? A Meteor is a Comet or Asteroid that completely burns up when it enters the Earths atmosphere As the Comet or Asteroid burns up, a streak is left behind. This sometimes known as a “shooting star”



6 What is a Meteorite? A Meteorite is a Comet or Asteroid that does not completely burn up when it enters the Earths atmosphere. As a result the comet or asteroid lands on the Earth’s surface. This is known as a “meteorite”

7 Willamette Meteorite The largest Meteorite found in the USA. Discovered in 1902

8 Willamette Meteorite

9 What is more likely going to be a meteor or a meteorite?
Due to their composition, comet is more likely to burn up in the atmosphere while an asteroid is more likely to make it to the Earth’s surface


11 Target 8 Analyze the impact that meteorites of varying size (meteoroid and asteroid) have on the Earth.

12 Meteoroid A meteoroid is a chunk of rock, metal, or dust in space.

13 Meteorite Meteoroids that survive as they pass through the atmosphere and hit Earth’s surface are called meteorites.

14 Barringer Meteor Crater, Arizona
Some 49,000 years ago a large nickel-iron meteorite “just” 150 ft across, weighing several hundred thousand tons (~300,000) and traveling at a speed of 40,000 miles per hour, hit Earth. The result of this meteor lies 55 km east of Flagstaff, Arizona and is called the Barringer Crater: the best preserved impact crater ever. The force generated by the impact was equal to the explosion of 20 million tons of TNT. Picture that. It measures 0.75 miles (1.2 km) across, is 575 ft (175 m) deep and has a rim 148 ft (45 m) higher than the surrounding plain. Discovered in 1902, the Barringer Crater was named after Daniel Barringer, a successful mining engineer. Today it is still owned by his family and is also known as Meteor Crater, Coon Butte, and Canyon Diablo. A meteorite can make a hole, or crater, in the ground when it hits it. The larger the meteorite, the bigger the hole.

15 Barringer Meteor Crater
- Scientists think that the crater was formed sometime between 25,000 and 50,000 years ago by an iron meteorite, somewhere between 30 and 100m in diameter, weighing roughly 60,000 tons. - The energy released by the impact was roughly equivalent to 3.5 million tons of TNT.

16 Impacts and Affects of Meteorites
Most Meteorites are small, however there are scars of larger scale meteorites still visible today.

17 Impacts Large Impact Craters Dust Clouds
Sunlight Blocked (food chain crumbles) Wild Fires Earthquakes Tsunamis Flooding

18 The Moon lacks a thick atmosphere so most comets and asteroids hit the Moon’s surface. This is why the Moon has so many craters (no plate tectonic movement means the impacts last forever)!

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