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Author Question: Where does most of Earth's 14C come from? A) It was deposited on Earth when the solar system ... (Read 46 times)

Sufayan.ah

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on: Jul 29, 2018
Where does most of Earth's 14C come from?
 
  A) It was deposited on Earth when the solar system first evolved.
  B) It is continually being formed by the impact of cosmic rays on the atmosphere.
  C) It is continually being formed as a result of the photosynthesis process
  D) It comes to Earth from outer space along with other cosmic rays.
  E) It was deposited on Earth many years ago by meteors.

Question 2

Earth moves about 30 km/s relative to the Sun. When you jump upward in front of a wall, the wall doesn't slam into you at 30 km/s because the wall
 
  A) has too little gravity to influence you.
  B) moves in the opposite direction to you.
  C) and you move at the same horizontal speed, before, during, and after your jump.
  D) has negligible inertia compared with the Sun.


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sylvia

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Reply #1 on: Jul 29, 2018
Answer to Question 1

B

Answer to Question 2

Answer: C


Sufayan.ah

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Reply 2 on: Jul 29, 2018
Gracias!

scikid

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Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

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