Author Question: Earth's average temperature has risen by how much in the past 100 years? A) 0.5F B) 1.5F C) ... (Read 99 times)

abern · **on:** Jul 12, 2018

Earth's average temperature has risen by how much in the past 100 years?

A) 0.5F
B) 1.5F
C) 2.5F
D) 3.5F

Question 2

The ozone layer is

A) close to Earth and poses no serious health threats.
B) in the stratosphere and protects the planet from UVB radiation.
C) a harmful chemical that is produced when oxygen interacts with water.
D) a layer of toxic gas produced by the discharge of aerosols, refrigerants, and solvents high into the earth's stratosphere.