Section 1
Earth's Atmosphere Creates Weather Layers
Our atmosphere contains multiple layers, with the troposphere closest to Earth's surface. This thin layer contains the air we breathe and is where all weather forms through moving air patterns.
In this Grade 4 lesson from Science: A Closer Look, students explore Earth's atmosphere, learning how properties like temperature, humidity, and air pressure interact to create weather. Students investigate how air pressure affects wind movement through a hands-on bottle experiment, then read about the layers of the atmosphere, including the troposphere where all weather occurs. Key vocabulary such as atmosphere, humidity, wind vane, and barometer give students the scientific language to describe and measure weather conditions.
Section 1
Earth's Atmosphere Creates Weather Layers
Our atmosphere contains multiple layers, with the troposphere closest to Earth's surface. This thin layer contains the air we breathe and is where all weather forms through moving air patterns.
Section 2
Scientists Measure Weather Using Specialized Tools
Weather stations use instruments like thermometers for temperature, barometers for air pressure, hygrometers for humidity, wind vanes for wind direction, and rain gauges to collect precipitation data.
Section 3
Air Pressure Forces Wind to Move
Cool air particles pack more closely together than warm air, creating higher pressure. These pressure differences cause air to flow from high-pressure areas to low-pressure areas, creating wind.
Section 4
Water Vapor Changes Air's Properties
Humidity measures water vapor in air, which evaporates mainly from oceans. High humidity creates sticky, damp conditions in places like rainforests, while deserts have minimal moisture content.
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Section 1
Earth's Atmosphere Creates Weather Layers
Our atmosphere contains multiple layers, with the troposphere closest to Earth's surface. This thin layer contains the air we breathe and is where all weather forms through moving air patterns.
Section 2
Scientists Measure Weather Using Specialized Tools
Weather stations use instruments like thermometers for temperature, barometers for air pressure, hygrometers for humidity, wind vanes for wind direction, and rain gauges to collect precipitation data.
Section 3
Air Pressure Forces Wind to Move
Cool air particles pack more closely together than warm air, creating higher pressure. These pressure differences cause air to flow from high-pressure areas to low-pressure areas, creating wind.
Section 4
Water Vapor Changes Air's Properties
Humidity measures water vapor in air, which evaporates mainly from oceans. High humidity creates sticky, damp conditions in places like rainforests, while deserts have minimal moisture content.
Book overview
Jump across lessons in the current chapter without opening the full course modal.
Continue this chapter