Watch the following documentary – Faces of Earth: Building a Planet https://yout
ID: 119849 • Letter: W
Question
Watch the following documentary – Faces of Earth: Building a Planet https://youtu.be/y-cc8fs3xYY
Answer the questions below, based on the video, in detail for a possible 15 bonus points.
1. What is AVIRIS? How is it used to explore the planet’s surface?
2. Detail what the video discusses about the Earth’s magnetic field. What is the purpose of the magnetic field? How does it work? What would happen if we did not have the magnetic field?
3. How has the earth’s atmosphere evolved? How has the composition changed? How did this influence water on this planet?
4. What is the recipe for life on this planet?
5. What was the first form of life on Earth? What was the waste product from the first organisms?
6. What happened to the iron that was dissolved in the early Earth’s oceans? When did this happen? Why?
7. What causes extinctions? When was the greatest extinction on Earth? What happened? Why?
8. What major geologic event happened 300 million years ago? What was the climate like? What developed during this time?
9. How does coal form? What do you need to start the coal formation process?
10. How does oil form?
11. What is LiDAR? Why it is used in Geology?
12. How do we find oil? What do geologists look for to discover hydrocarbons?
13. How is natural gas formed?
14. How do we discover these hydrocarbons? What types of ways do we image the internal features of Earth?
15. How are salt domes formed? What do scientist find around salt domes?
https://www.youtube.com/watch?v=y-cc8fs3xYY&feature=youtu.be
Explanation / Answer
1. Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) can be used to calculate Live Fuel Moisture measurements, can be used to know the geomorphology of the earth’s surface, green cover or the vegetation pattern can be calculated by this. AVIRIS is a 224 channel imaging spectrometer that samples reflected radiance between 350 and 2500 nm with a 34 degree field of view and a 1 milliradian instantaneous field of view (IFOV). When deployed on the ER-2 from an elevation of 20 km, this results in a nominal Ground IFOV (GIFOV) of 20 m and an image swath of 11 km.
2. The Earth behaves like a giant magnet, making it possible for us to use a magnetic compass as a direction finder. Earth's magnetic field is similar to that of a bar magnet, tilted 11 degrees from the spin axis of the Earth.
Earth’s magnetic field acts like a shield around the Earth, protecting us from energetic charged particles that come mostly from the Sun (solar wind). The magnetic field deflects the speeding particles toward Earth's poles. Without the magnetic field, Earth would be subjected to more cosmic radiation.
3. Earth experienced many cycles of glaciation adn de-glaciation with temperature shifting from enormously hot during the formation of earth to sub zero levels during ice age this also effect the atmosphere with major variation in gases like carbondioxide and oxygen. High value of carbondioxide increases the temperature as it is a green house gas this heating melted the galciers and thus we have a supply of fresh water available on earth.
4. The recipe of life on Earth is, we need minerals like hydrogen, oxygen, carbon, calcium, sodium, chlorine, iron apart from this we need solid surface and surface gravities which wouldm't break our spindle we need right magnetic filed and right temperature to balance it all
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