Air Masses & Storm FormationANSWER KEY
Name: Period: Date:
1.Weather is short-term atmospheric conditions; climate is long-term patterns over decades
2.Warm air rises (less dense), cold air sinks (more dense) - drives convection
3.Seasons are caused by Earth's axial tilt, not distance
REF STUDY GUIDE: Big Ideas Use to answer form questions
1.Air masses are huge bodies of air with uniform temperature and moisture. They form over source regions and are classified by temperature (polar/tropical) and moisture (maritime/continental).
2.Fronts form where air masses with different densities collide. Cold fronts push under warm air (fast, severe); warm fronts slide over cold air (slow, steady rain).
3.Pressure differences drive wind and predict weather patterns. High pressure = sinking air = clear skies; Low pressure = rising air = clouds and storms.
Sun Heats Surface -> Air Mass Forms -> Masses Collide -> Front Develops -> Storm/Weather
WEATHER CASCADE (Sun energy drives air mass movement, collisions create fronts and storms)
DRAW KEY TERMS Google each → Images tab → sketch what you see
Air mass
Large body of air with uniform temperature and humidity / Gran cuerpo de aire con temperatura y humedad uniforme
Front
Boundary where two air masses meet
Pressure system
H = sinking air, clear; L = rising…
Isobar
Line on map connecting equal press…
WRITE FOCUS QUESTION Your initial thinking
Why do some areas get massive storms while nearby areas stay dry?
In February 2011, Chicago received 21.2 inches of snow in just 24 hours—shutting down Lake Shore Drive and stranding thousands. But cities just 50 miles south got only a dusting. How can two places so close have such different weather?
I think some areas get hit harder because...
WRITE AFTER HOOK FORM Reflect before continuing
I learned that air masses affect local weather by...
Station 1 — Air Mass Properties
Maritime tropical (mT) air is different from continental polar (cP) because...
Cold air sinks and warm air rises because of differences in...
This connects to Chicago's blizzard because...
Station 1 — Air Mass Properties
CHECKPOINT: air mass = large body of air with uniform temperature and humidity from its source region
Maritime tropical (mT) air is different from continental polar (cP) because...
Cold air sinks and warm air rises because of differences in...
This connects to Chicago's blizzard because...
Station 2 — Frontal Boundaries
CHECKPOINT: front = boundary where air masses of different densities collide, causing weather changes
When a cold front pushes under warm air, the weather changes by...
A warm front differs from a cold front because...
Fronts cause severe weather when...
CHECK DAY 1 CHECK-IN Before you leave
Q1: Why does a cold front typically produce more severe weather than a warm front?
Q2: How might changing weather patterns affect the ecosystem monitoring systems we studied in C4?
Confidence:
NGSS: MS-ESS2-5 Page 1 of 2 | Day 1 v4.3
Air Masses & Storm Formation (Day 2)ANSWER KEY
Name:
Station 2 — Frontal Boundaries
When a cold front pushes under warm air, the weather changes by...
A warm front differs from a cold front because...
Fronts cause severe weather when...
Station 3 — Pressure System Analysis
CHECKPOINT: pressure system = area of high or low atmospheric pressure; isobars close together = strong wind
High pressure systems bring clear weather because...
Low pressure systems create storms because...
Reading a weather map, I can predict storms by looking at...
DRAW YOUR WEATHER SYSTEM MODEL Complete before exit
Model how air masses create weather: (1) Two air masses with labels (type, temp, moisture), (2) Front boundary between them, (3) What happens to air at the front (rising/sinking), (4) Weather result (clouds, precipitation). Use arrows for air movement, labels for each part.
TODO: author answer text
Include: Two air masses Front boundary Air movement arrows Pressure labels (H/L) Weather result
CHECK TEST YOUR THINKING Rate each: FALSE ← 1–2–3–4–5 → TRUE
1. Cold air rises because it has more energy than warm air.
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2. Weather and climate are the same thing, just measured differently.
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3. Air masses collide at fronts because they have different densities.
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4. High pressure always means the temperature will be hot.
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5. Uneven heating by the Sun is what ultimately drives weather patterns on Earth.
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Defend TWO of your ratings - what do you know that you know?
Statement #__: I rated this ___ because...
Statement #__: I rated this ___ because...
SCIENCE CIRCLE: Bring worksheet. Share ratings, defend them. Talk only—no writing!
WRITE ANSWER THE FOCUS QUESTION After Science Circle
Why do some areas get massive storms while nearby areas stay dry?
My "Aha!" Moment
I now understand that...
Still Wondering
I'm still wondering...
Some areas get massive storms because air masses with different densities... TODO: author answer text
The type of front determines the weather because... TODO: author answer text
This explains the Chicago blizzard because... TODO: author answer text
NGSS: MS-ESS2-5 Page 2 of 2 | Day 2 v4.3