Science 8 2nd Qtr Lesson 6 Meteoroid, Meteor and Meteorite.pptx

Science

1. Meteoroid What are the Meteor differences? Meteorite

2. Meteoroid is a broken up rock and dust from either a comet, asteroid, the Moon or from Mars. When a meteoroid enters Earth’s atmosphere, the air in front of the meteoroid heats up, causing materials to burn up.

3. Meteor is a fragment of the meteoroid that burns up as it enters the Earth’s atmosphere.

4. Meteorite is a fragment from the meteoroid survives and makes it to the ground

5. A meteor shower is a celestial event in which a number of meteors are observed to radiate, or originate, from one point in the night sky. These meteors are caused by streams of cosmic debris called meteoroids entering Earth's atmosphere at extremely high speeds on parallel trajectories.

6. How can you differentiate a meteor from a comet when viewed from Earth? What differentiates the two when we see them in the sky is that a comet moves slowly and appears in the sky for a longer time. A meteor moves swiftly and seems to fall on the ground . It “shoots” from a point in the sky, making people think that it is a shooting or falling star.

7. How can you differentiate a meteor from a comet when viewed from Earth?

8. Meteorite can be as small like these but can be as huge like these...

9. Willamette Meteorite The Willamette Meteorite, officially named Willamette and originally known as Tomanowos by the Clackamas Chinook Native American tribe is an iron-nickel meteorite found in the U.S. state of Oregon. It is the largest meteorite found in North America and the sixth largest in the world

10. The 60- tonne , 2.7 m-long (8.9 ft) long Hoba meteorite in Namibia is the largest known intact meteorite

11. Types of Meteorites Stony Meteorite Stony-iron Meteorite Iron Meteorite The most common type of meteorite; generally composed of 75-90% silicon based materials; n25% nickel-iron alloy and trace amounts of iron sulfide Contain approximately equal amounts of silicon based materials and nickel-iron alloy Originated in the cores of a large asteroid; composed entirely of nickel-iron alloy, which is also a primary component of the Earth’s core

12. Exit Pass Cite one example of Celestial Superstition Beliefs