|
Changes in the tropospheric layer of this are what gives us weather |
the atmosphere
|
$1,600 |
DJ |
SCIENCE |
2007-10-08 |
#5306 |
|
This nearly transparent 3-syllable envelope of gases surrounding the Earth is about 78% nitrogen |
the atmosphere
|
$400 |
DJ |
AN "A" IN SCIENCE |
2006-01-13 |
#4915 |
|
When astronauts talk of "re-entry", this is what they re-enter |
the atmosphere
|
$500 |
J |
SCIENCE |
1990-03-07 |
#1278 |
|
The three main parts of the Earth are the lithosphere, the hydrosphere & this |
the atmosphere
|
$1,000 |
DJ |
SCIENCE |
1985-05-16 |
#179 |