Air and Atmosphere

Air and Atmosphere
Oxygen is used in the manufacture of
glass
medicine
metal
chemical
Author: rikazzz Comment
Air and Atmosphere
The percentage composition of oxygen in air is
21%
31%
41%
51%
Author: rikazzz Comment
Air and Atmosphere
Nitrogen is obtained from the fractional distillation of liquefied air at about
196°C
186°C
176°C
166°C
Author: rikazzz Comment
Air and Atmosphere
Intake of carbon dioxide and giving out of oxygen is the only process named
photosynthesis
respiration
rusting
excretion
Author: rikazzz Comment
Air and Atmosphere
Ammonia is used to make compounds such as
ammonium sulfate
ammonium nitrate
all of these
nitric acid
Author: rikazzz Comment
Air and Atmosphere
In fish, respiration takes place through
gills
lungs
throat
tail
Author: rikazzz Comment
Air and Atmosphere
There is no boundary between atmosphere and space, so the density of atmosphere decreases with
same height
increasing altitude
constant height
decreasing height
Author: rikazzz Comment

Go to Page