Page 102 - Science Course 1 (Book 2)

Mo9-L2b: What are Weather and Climate?

Let’s Begin Key Concept

What are Weather and Climate?
Changes in the Atmosphere
How does weather show interactions of Earth
systems?
Weather is the state of the atmosphere at a certain
time and place.
Weather is inf uenced by conditions in the geosphere
and the hydrosphere.

Climate is the average weather pattern for a region
over a long period of time.

Scientists describe
weather using air
temperature and
pressure, wind speed
and direction, and
humidity.

As wind blows over an ocean, it creates surface currents that transport the thermal energy in water from place
to place.

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