If the Earth's rotation axis were tilted by 45 degrees instead of ...

[Mr3Hunna]

If the Earth's rotation axis were tilted by 45 degrees instead of 23.5 degrees, what are some of the implications, and why?
 
  A) The seasons would be less extreme, because the Sun's rays would be less direct in summer, and more direct in winter.
  B) The seasons would be more extreme, because the surface of the Earth would be closer to the Sun in the summer, and farther from the Sun in the winter.
  C) The seasons would be less extreme, because the surface of the Earth would be farther from the Sun in the summer, and closer to the Sun in the winter.
  D) The seasons would be more extreme, because the Sun's rays would be more direct in summer, and less direct in winter.

Question 2

The most common isotope of uranium is U-238, but the form used in nuclear bombs and nuclear power plants is U-235. Given that uranium has atomic number 92, how many neutrons are in each of these two isotopes?
 
  What will be an ideal response?

[Alyson.hiatt@yahoo.com]

Answer to Question 1

D

Answer to Question 2

U-238 has 146 neutrons, and U-235 has 3 fewer, or 143 neutrons.

[Mr3Hunna]

Excellent

[jackie]

Gracias!