Walking about on land, we are at the……..…of earth’s atmosphere.
a) top
b) surface
c) bottom
d) none of these
Explanation: just as certain sea creatures live at the bottom of ocean, we live at the bottom of a huge ocean of air.
The pressure that atmosphere exerts is called…. pressure.
a) standard
b) atmospheric
c) altitude
d) none of these
The pressure of air at a given place varies slightly according to the……….
a) density
b) weather
c) atmosphere
d) none of these
At sea level, the pressure of the atmosphere on average is……………
a) 1.012x105Nm2
b) 1.013x105 Nm-2
c) 1.014x105 Nm2
d) 1.014x105 Nm2
The unit of atmospheric pressure is……..
a) Pascal
b) bar
c) atm
d) none of these
1atm = ……………
a) 1.013x105 Nm-2
b) 1.012x105
c) 1.013x105 Pa
d) both a & c
Explanation: 1Pa = 1 Nm-2 . Both are used as a unit of pressure.
