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CRATER COMPARISONS

Juno. CRATER COMPARISONS. Imaging Systems are an important aspect of almost every mission . Images help tell the “planetary story”. Nikon Cameras. Framing Camera. Mercury Dual Imaging System (MDIS). International Space Station. MESSENGER. Image Credits: NASA. CRATER COMPARISONS.

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CRATER COMPARISONS

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  1. Juno CRATER COMPARISONS Imaging Systems are an important aspect of almost every mission. Images help tell the “planetary story”. Nikon Cameras Framing Camera Mercury Dual Imaging System (MDIS) International Space Station MESSENGER Image Credits: NASA

  2. CRATER COMPARISONS Images of impact craters provide important clues about the “story” (history) of a planetary surface… Image Credits: NASA

  3. Earth Earth’s Moon Mars Mercury Asteroid Vesta Images not to scale Image Credits: NASA

  4. Impact craters begin to tell the story…. YouTube Video – Crater Formation: Glass bead into sand: http://youtu.be/4z5oRJOyKpg

  5. Thinking about SCALE A. Image area B. Size of craters C. Degradation Earth’s Moon Mars Image Credits: NASA

  6. CRATER OBSERVATIONS • Estimage • Image area • # of craters • Observe • craters 1, 2, & 3: • Diameter • Level of degradation (low, medium, high) • General “shape” observations 1 3 Mars 2 Image Credit: NASA

  7. CRATER TYPE & CLASSIFICATION Relative age and degree of modification • Crater 1: • Type: Simple • Classification: Preserved (fresh) • Crater 2: • Type: Complex • Classification: Modified • Crater 3: • Type: Complex • Classification: Destroyed (Highly degraded) 1 3 Mars 2 Image Credit: NASA

  8. CRATER DENSITY: Relative Age MORE CRATERS = OLDER SURFACE Mars Image Credits: NASA

  9. (Fresh) (Highly degraded)

  10. “Read” the story of your planetary world... Each group will: 1) Log observations of 3-5 images 2) Discuss observations & inferences RECOMMENDATION Browse entire set of images first (make initial inferences about the relative age of your world)

  11. What general inferences about the history of this planetary world as a whole? What additional data/information would be beneficial to have? Discuss

  12. Log Sheet

  13. CRATER COMPARISON ACTIVITY CLOSING REMARKS • Application of widely used scientific principles • Crater Density: Be aware and careful! • Most appropriate when comparing areas of equal sizes • Discussion Questions Follow-up: • Can you make general inferences about the history of this planetary world as a whole? Explain. • What additional data/information would be helpful to have? • Sharing observations of each planetary world

  14. Impact craters help tell the story of a surface, region, planetary world, and our Solar System! Credit: NASA/JPL Image Credits: NASA/Lunar Reconnaissance Orbiter Image Credits: NASA

  15. CRATER COMPARISONS Practice of Scientists: NGSS An “all-inclusive” set of resources: guides, images, strategies Designed engage learners in the Process of Science. Fillable document using Adobe Reader

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