Approximately 95 of the Earth's crust is made up of A) oxides. ...

[Engineer]

Approximately 95 of the Earth's crust is made up of
 
  A) oxides.
  B) phosphates.
  C) silicates.
  D) carbonates.

Question 2

Longwave radiation (+ LW) arriving at the Earth's surface
 
  A) comes primarily from infrared energy emitted by the atmosphere.
  B) comes directly from the Sun.
  C) comes from diffuse solar radiation.
  D) comes from UV radiation reflected from the bottoms of clouds.

[lin77x]

Answer to Question 1

C

Answer to Question 2

A

[Engineer]

Thanks for the timely response, appreciate it

[debra928]

Gracias!