Atmospheric pressure and winds

Question 1

Define atmospheric pressure

Question 2

What is the atmospheric pressure at sea level?

Question 3

Does pressure increase or decrease with increase in altitude?

Question 4

isobars?

Question 5

2 types of barometers?

Question 6

pressure gradient?

Answer 6

Rate of change of atmospheric pressure between 2 points on the earth’s surface.

Question 7

factors affecting atmospheric pressure - 4

Question 8

what is decompression sickness? what is it also known as? who does it affect?

Answer 8

moving from high pressure to low pressure quickly. also known as the bends. affects scuba divers who return to the surface to fast and mountain climbers who carry bottles oxygen.

Question 9

Why is artificial pressure created in aircrafts?

Answer 9

Artificial pressure is created in aircraft to ensure passengers and crew get enough oxygen at high altitudes where air pressure is low.

Question 10

what is global horizontal distribution of pressure?

Question 11

describe the pressure belts in detail.

Question 12

Explain how the pressure belts shift due to the inclination of the earth’s axis.

Answer 12

when it shines above equator it is balanced. above capricorn they move 5 degrees south and cancer 5 degrees N

Question 13

winds?

Answer 13

Horizontal movement of air

Question 14

Air current?

Answer 14

Vertical movement of air

Question 15

factors that affect direction and speed of wind

Answer 15

coriolis effect - deflects the air
pressure gradient - steeper is the gradient faster is the speed of wind.

Question 16

define permanent winds?

Answer 16

all year
from one lat to another
due to diff in air pressure
planetary permanent or prevailing

Question 17

SN on trade winds

Question 18

characteristics of trade winds

Answer 18

warm winds and are responsible for rainfall on the eastern coast of landforms
they have a fixed velocity
blow from sub-tropical high pressure areas to equatorial low pressure
permanent or prevailing winds

Question 19

characteristics of westerlies.

Answer 19

blow from circum polar to sub-tropical pr belts
they are stronger in the souther hemisphere as there is no major landmass
are responsible for slight drizzle
blow from the western side of the landmass

Question 20

characteristics of polar easterlies.

Answer 20

v cold winds
blow from the east
when they blow over oceans they become warm.

Question 21

SN on summer and winter monsoon

Question 22

SN on loo

Answer 22

hot n dry wind blowing from the west
over pakistan and som parts of india
called loo
temp 45 - 50
causes sunstroke