2.1 Environmental Studies- The atmosphere- The composition of the atmosphere

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O C C R V A B O D D D P B P B S C G E M D
L C A D D X P E O C L D K S Y T Q R V H T
U P R A X A P R U C M Y I J V R M D N L V
I S B V I M H E J X W N U K J A N G N D R
H I O M J A U H B K H A N S R T E T U L P
V D N O P R L P S N N M N M J O H Y C G M
M P D X K G M S V S D I E D V S S U L U W
H O I Q E E I O U C Q C G E M P G D E M U
H U O O W R H S F C C E Y R F H R A A T Q
H S X S K E C E R V O Q X E F E B B R J B
E T I A J H T M D U Z U O H C R R S F D U
B C D R R P B M Q N O I U P I E A A U O H
H N E M V S X F E U N L N S B T F D S E H
V A J N B O P G D W E I K O B E S Y I S V
E P Y N H M O J X S L B S P D N I B O E T
B D O B O R P F M B F R F O P O H E N L Q
F J R F T E K E R S L I E R H R L W Y W U
I B T I J H L I T K J U X T I K G A H E C
Y H N Q U T U L O B O M V P I F U C E X J
B G P J R P N P W X A S U F O P I D J T K
D K B B P B K V L K J Q W S O V I C W A S

Clues

  • A combination of active processes that cancel out each others effects so that there is no overall change. (7, 11)
  • The layer of the atmosphere that absorbs UV and contains the ozone layer, temperature increases with altitude here. (12)
  • The layer of the atmosphere where meteors burn up, temperature decreases with altitude here. (10)
  • The layer of the atmosphere where the weather occurs, temperature decreases with altitude here. (11)
  • The layer of the atmosphere where X-rays are absorbed, space shuttles orbit here. (12)
  • The release of energy during the joining of the nuclei of small atoms (7, 6)
  • This gas makes up 0.000007% of the atmosphere, and absorbs UV light in the stratosphere. (5)
  • This gas makes up 0.038% of the atmosphere, and is used in phosynthesis. (6, 7)
  • This gas makes up 21% of the atmosphere, and is used in aerobic respiration. (6)
  • This gas makes up 78% of the atmosphere, and is part of proteins. (8)

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