Climate and Weather
 Lesson
4
Air Masses Move
In the fourth Climate and Weather
lesson, students tackle the tricky concept of the
Coriolis force. Many students have the misconception
that water, when draining from a sink or tub, spins
in one direction in the Northern Hemisphere and in
the opposite direction in the Southern Hemisphere.
In this lesson, you will debunk that theory right
before your students’ eyes! But don't tell them
that... they’ll figure it out as you recreate
a con artist’s trick that actually fooled BBC
producers.
Student Objectives
- Relating high-pressure air masses to fair weather;
relating low-pressure air masses to bad weather
- Defining front and giving examples of weather
that can occur at frontal boundaries where warm
and cool air masses meet
- Explaining how the Coriolis force modifies air
movement
- Correlating wind to convection currents and the
Coriolis force
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