« previous next »

Author Question: Which of the following is TRUE about Earth's atmosphere? A) It is denser at higher altitudes. B) ... (Read 51 times)

theo

  • Hero Member
  • *****
  • Posts: 698
on: Jul 14, 2018
Which of the following is TRUE about Earth's atmosphere?
 
  A) It is denser at higher altitudes.
  B) It allows gamma rays and X-rays reach the surface.
  C) The ozonosphere and ionosphere shield the surface from harmful radiation.
  D) Variable gases are the dominant gases in the atmosphere.

Question 2

The top of Earth's atmosphere is approximately
 
  A) 3,200 km (1,988 mi) above Earth's surface. B) 2,000 km (1,243 mi) above Earth's surface.
  C) 480 km (300 mi) above Earth's surface. D) 1,000 km (621 mi) above Earth's surface


matt95

  • Sr. Member
  • ****
  • Posts: 317
Reply #1 on: Jul 14, 2018
Answer to Question 1

C

Answer to Question 2

C


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

The first successful kidney transplant was performed in 1954 and occurred in Boston. A kidney from an identical twin was transplanted into his dying brother's body and was not rejected because it did not appear foreign to his body.

Did you know?

Barbituric acid, the base material of barbiturates, was first synthesized in 1863 by Adolph von Bayer. His company later went on to synthesize aspirin for the first time, and Bayer aspirin is still a popular brand today.

Did you know?

Many supplement containers do not even contain what their labels say. There are many documented reports of products containing much less, or more, that what is listed on their labels. They may also contain undisclosed prescription drugs and even contaminants.

Did you know?

Street names for barbiturates include reds, red devils, yellow jackets, blue heavens, Christmas trees, and rainbows. They are commonly referred to as downers.

Did you know?

The liver is the only organ that has the ability to regenerate itself after certain types of damage. As much as 25% of the liver can be removed, and it will still regenerate back to its original shape and size. However, the liver cannot regenerate after severe damage caused by alcohol.

Animation of the apparent retrograde motion of Mars in 2003 as seen from Earth Animation of the apparent retrograde motion of Mars in 2003 as seen from Earth
true story true story
Close-ups of Jupiter’s Atmosphere Close-ups of Jupiter’s Atmosphere
Hints of Earth’s Early Appearance Hints of Earth’s Early Appearance
Earth’s orientation Earth’s orientation
Earth’s Heat Budget Earth’s Heat Budget
Video: Double Vacuum Process (Illustration No Audio)

For a complete list of videos, visit our video library