6th Grade Earth Science Lesson
Why Did the Weather Change So Fast? Air Masses, Fronts, and Severe Weather
Shared by A STEM Educator
6th GradeNGSS Phenomenon-BasedMS-ESS2-5, MS-ESS2-645 min
Learning Objective
Students will analyze patterns in temperature, pressure, and humidity data to explain how the interaction of air masses at frontal boundaries causes rapid weather changes, supporting NGSS MS-ESS2-5.
Lesson Overview
Students investigate why weather can change dramatically within hours by analyzing air mass interactions and frontal boundaries, anchored in real aviation weather data and emergency severe weather scenarios.
Materials
- Printed weather map sets (4 maps showing front progression over 24 hours)
- Multi-city weather data tables (temperature, pressure, humidity, wind direction)
- Colored pencils (blue, red, purple, green for front types)
- Barometric pressure and temperature log strips (warm-up activity)
- Front symbol card sets (1 set per pair)
- Rulers and pencils
- Student investigation handouts
- Class anchor chart: Air Mass Source Regions map
Scaffolded Task Progression
1Task 1
Front Symbol Identification — Aviation Weather Map
Your air traffic control team has received the weather map below. Using your Front Symbol Card Set as a reference, examine the map and answer:
1. Circle and label each front type you can identify: cold front, warm front, stationary front, and occluded front.
2. Color each front using the aviation convention: cold front = blue, warm front = red, stationary front = alternating blue/red, occluded front = purple.
3. Which front symbol looks like blue triangles pointing in the direction the front is moving? Which looks like red semicircles?
[ Interactive graph / diagram — available in the full lesson ]
Your air traffic control team has received the weather map below. Using your Front Symbol Card Set as a reference, examine the map and answer:
1. Circle and label each front type you can identify: cold front, warm front, stationary front, and occluded front.
2. Color each front using the aviation convention: cold front = blue, warm front = red, stationary front = alternating blue/red, occluded front = purple.
3. Which front symbol looks like blue triangles pointing in the direction the front is moving? Which looks like red semicircles?
[ Interactive graph / diagram — available in the full lesson ]
2Task 2
Air Mass Source Regions — Where Does the Air Come From?
Different regions of Earth produce air masses with very different properties. Use the descriptions below to match each air mass label to its source region on the class anchor chart map, then complete the table.
Aviation connection: When a dispatcher sees a cP air mass colliding with a mT air mass over the Great Plains, why should pilots flying that corridor be on high alert?
Different regions of Earth produce air masses with very different properties. Use the descriptions below to match each air mass label to its source region on the class anchor chart map, then complete the table.
| Air Mass Code | Source Region | Temperature | Humidity |
|---|---|---|---|
| cP | Canadian/Arctic land | ? | ? |
| mT | Tropical ocean (Gulf of Mexico) | ? | ? |
| cT | Desert Southwest (land) | ? | ? |
| mP | North Pacific Ocean | ? | ? |
Aviation connection: When a dispatcher sees a cP air mass colliding with a mT air mass over the Great Plains, why should pilots flying that corridor be on high alert?
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