Which of the following is the best description of how a ...

[savannahhooper]

Which of the following is the best description of how a fluorescent bulb works?
 
  A) Electrons flowing through the bulb get heated up within the bulb, and these electrons emit light.
  B) A gas flows from one end of the bulb to the other, and the gas atoms are energized by the electric field which causes the atoms to emit light.
  C) Electrons flow through the bulb, causing a chemical reaction in the gas atoms inside the bulb, which causes these atoms to emit light.
  D) A gas fills the bulb and when the gas atoms strike the walls of the bulb the material in the wall emits light.
  E) Electrons flow from one end of the bulb to the other, hitting gas atoms and causing them to emit light.

Question 2

The effect of de-forestation on the ozone layer problem is
 
  A) that it worsens the problem only if the wood is burned.
  B) that it actually helps reduce the problem.
  C) that it worsens the problem regardless of whether the wood is burned.
  D) essentially zero.

[FergA]

Answer to Question 1

E

Answer to Question 2

D

[savannahhooper]

Gracias!

[6ana001]

Excellent