Logging in (or registering) will help the system to select questions that you need to focus on.

T3A11

Which part of the atmosphere enables the propagation of radio signals around the world?

Select	Answer
A	The ionosphere
B	The magnetosphere
C	The troposphere
D	The stratosphere

---

Hamboozler: Copyright 2007 Four Batons Technology. All rights reserved.
By continuing to use this site, you are agreeing to the Privacy Policy and Terms of Service.
Contact Us