Variations in wind direction & wind speed across Earth's surface

Wind is the ________ movement of air across Earth's surface.

• curve

• horizontal

• straight

• vertical

Wind occurs due to the unequal distribution of air temperature and results in unequal distribution of ________ gradients.

When air is heated, it becoome less dense and rises. This results in a _______ pressure.

• higher

• lower

• moderate

• slow

Places with higher temperatures experience a _______ pressure.

When air cools, it becomes _______ and sinks.

• dense

• fluffy

• less dense

• light

Places with lower temperatures experience a ________ pressure.

_______ is formed when air moves from an area of higher pressure to an area of lower pressure.

• cloud

• hail

• rain

• wind

A small difference in pressure between two areas will lead to ______ wind speed.

• fast

• moderate

• no

• slow

A big difference in pressure between two areas will lead to ______ wind speed.

• fast

• moderate

• no

• slow

When moving air comes in contact with Earth's topography, it experiences _______ drag which reduces wind speed.

• collide

• frictional

• gravity

• pull