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Home Q & A Board Science-Related Homework Help Physics Astronomy
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bonge4379 bonge4379
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6 years ago
What is the most compelling piece of evidence that suggests that the dinosaurs were made extinct by the impact of an asteroid 65 million years ago?
 
  A) a layer of sediment laid down at that time which is littered with dinosaur fossils
  B) dinosaur fossils are found in rock layers older than 65 million years but not younger than 65 million years
  C) a layer of sediment laid down at that time which is rich in the element Iridium (Ir), an element common in asteroids but less common on the Earth
  D) the crater from this impact can still be seen in the deserts of Arizona

Question 2

Six pounds on Earth has what weight on the moon?
 
  A) 1. kg
  B) 6. lb
  C) 36. lb
  D) 1. lb
  E) 1/6 lb

Question 3

If you run a complete loop around an outdoor track (400 m) in 100 s, your average speed is
 
  A) 40000. m/s.
  B) 4.0 m/s.
  C) 4.0 km/h.
  D) 4.0 mph.
  E) 0.40 m/s.
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thatguythatguy
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6 years ago
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bonge4379 Author
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6 years ago
Thanks for your help!!
Fleury
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Yesterday
Smart ... Thanks!
Marcie D
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2 hours ago
This site is awesome
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