Page 130 - Science Course 1 (Book 2)

Air Currents Mo9-L5a: What are Air Currents?

Lesson 5

Let’s Begin

In this topic, you will learn the following
lessons: Global Winds
Mo.9 – L5a: What are Air Currents?
Mo.9 – L5b: What are the Main Wind Belts on Wind patterns can be global or local.
Earth?
There are great wind belts that circle the globe, and
the energy that causes this massive movement of air
originates at the Sun.
Mo9-L5a What are Air Currents?
Polar Easterlies
KEY CONCEPTS:
1. How does uneven heating of Earth’s surface result
in air movement? Westerlies
2. How are air currents on Earth affected by Earth’s
spin?

Tradewinds
Vocabulary A-Z
Let us learn some vocabulary

Tradewinds
wind
the movement of air from areas of high pressure to
areas of low pressure. Westerlies

Polar Easterlies
Not all areas of Earth receive the same amount of energy
from the sun

The differences in pressure between areas with low temperatures and high temperatures create wind.
Wind is the movement of air from areas of high pressure to areas of low pressure.

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