What are some physical and chemical differences between gas and water?

A gas in the atmosphere that is important for the development of plants and animal cell proteins is ________.?

• 1. a gas in the atmosphere that is important for the development of plants and animal cell proteins is ________. a) argon b) oxygen c) carbon monoxide d) nitrogen e) carbon dioxide 2. the part of the atmosphere that protects people from harmful ultraviolet radiation from the sun is called the ___________. a) shield b) mesosphere c)ozone layer d) ion layer e) chemical layer 3. the gas most plentiful in the atmosphere is ___________. a) sulfur dioxide b) carbon dioxide c) argon d) oxygen e) nitrogen 4. the presence of water vapor in pure air ___________. a). lower the density b). lower the temperature c). both increases the gravity and lowers the temperature d). increases the gravity e). increases the density 5. the atmosphere has several unique layers showing differences in ________. a) temperature b) chemical properties c) physical properties d) b and c e) all of the above

• Answer:

  The first one is nitrogen. The second one is the ozone layer. The third one is nitrogen, I think. Sorry, I don't know the last two.