Test 2
types of fronts:
cold: puffy clouds, cold air from the north, converging winds
warm: flat clouds, overcast skies, fog, light rain
in the winter this means bad mix of sleet, snow, freezing rain
stationary: flooding, days/weeks of rains
occluded: when cold front catches up with warm front
air masses: large body of air similar temp and humidity
source regions: where air masses begin
types of air masses:
Tropical: Warm and moist air masses that form near the equator
Polar: Cold air masses that originate from high-latitude regions
Maritime: Humid air masses that form over oceans
Continental: Dry air masses that develop over land
clockwise winds= clear sky high pressure
counter clockwise= rain, low pressure
isobars: lines of equal pressure
ocean circulation: redistributes heat energy
spring tides: new/full moon, high tides
neap tides. 1st/3rd quarter moons, low tide
weather=right now
climate= weather long term
controlled by latitude, proximity to the ocean, elevation, topography (mountains, valley, winds)
water cycle energy balance: storms and ocean currents
convection: mass movement of liquid
ways heat is transfered: radiation, conduction, convection
What causes seasons?
a. unequal day or night
b. difference in suns intensity of the sunlight because of the height of the sun in the sky (beam spreading)
c. north pole will tell season
1. Weather vs. Climate
Weather: Short-term atmospheric conditions (hours to days). Includes temperature, humidity, precipitation, wind, clouds.
Climate: Long-term average of weather patterns over decades or centuries in a region.
2. Components of Weather & Climate
Weather: Temperature, humidity, precipitation, cloud cover, wind speed/direction, atmospheric pressure.
Climate: Patterns of temperature, precipitation, wind, and seasonality over long periods.
3. Urban Heat Island Effect
Cities absorb and retain more heat due to concrete, asphalt, and buildings.
Effect: Cities are often warmer than surrounding rural areas, can change local wind patterns, increase energy use, and influence rainfall.
4. Only Substance Naturally in All 3 States
Water (H₂O) exists as solid (ice), liquid (water), gas (vapor).
Impact: Drives the water cycle; phase changes transfer energy, influence weather and climate.
5. Summer & Earth-Sun Distance
Disagree: Seasons are caused by Earth's tilt, not proximity to the Sun.
Summer = hemisphere tilted toward the Sun, more direct sunlight, longer days.
6. Variables Influencing Climate (other than latitude)
Altitude, ocean currents, proximity to water, topography, prevailing winds, vegetation, human activity.
7. Greenhouse Gases
Gases like CO₂, CH₄, N₂O trap heat in the atmosphere.
They balance Earth's energy by keeping it warm enough to support life.
8. Albedo
Reflectivity of a surface (e.g., ice = high, water/soil = low).
Influence: Higher albedo → more sunlight reflected → cooler temperatures.
9. Specific Heat
Definition: Energy needed to raise 1 g of a substance by 1°C.
Water > soil → water heats/cools slower than land.
Implication: Coastal areas have milder temperatures.
10. Land/Sea Breezes
During the day: Land heats faster → air rises → cooler air from water moves in → sea breeze.
At night: Land cools faster → land breeze.
11. Coriolis Force
Apparent deflection of winds due to Earth’s rotation.
Northern Hemisphere: deflects right, Southern Hemisphere: left.
Influences global wind patterns like trade winds and jet streams.
12. Seasons
Caused by Earth’s tilt (23.5°) and orbit.
Day length & light intensity vary → affects temperature.
13. North Star (Polaris)
Fixed point in the sky near the celestial north pole.
Helps navigate and measure latitude.
14. Why the Sea Moves / Water Cycle
Driven by solar energy → evaporation, condensation, precipitation, runoff.
Influences regional climate (moderates temperature, adds moisture).
15. Unique Properties of Water
High specific heat: stabilizes climate.
Cohesion/adhesion: allows transport in plants, cloud formation, precipitation.
16. Convection
Heat transfer via fluid movement (air/water).
Drives wind, ocean currents, storms → influences weather & climate.
17. Heat Transfer in Phase Changes
Condensation releases heat, evaporation absorbs heat → redistributes energy globally.
18. Water Conservation
Total water is fixed; distribution varies. Droughts, pollution, and overuse make freshwater scarce.
19. Warmest & Most Humid Locations
Near the equator (tropics).
High solar energy + lots of water → high evaporation → humidity & rain.
20. Hadley Cells
Large convection loops from equator to ~30° latitude.
Trade winds: surface winds from Hadley cells.
Wettest places = equator (rising air), driest = deserts (~30°, sinking air).
21. Intertropical Convergence Zone (ITCZ)
Zone where trade winds converge, intense rain.
Moves north/south with solar heating.
22. Key Weather Instruments
Thermometer: temperature
Barometer: pressure
Hygrometer: humidity
Anemometer: wind speed
Rain gauge: precipitation
23. Condensation Surfaces
Condenses on cool surfaces (dew), dust particles or aerosols in the air (clouds).
24. Temperature & Condensation
Cooler air holds less water → condensation occurs → clouds, dew, fog.
25. Water Cycle Story
Processes: Evaporation → Condensation → Precipitation → Runoff → Infiltration.
Ocean conveyor belt / thermohaline circulation: Moves heat & nutrients globally; driven by salinity & temperature differences.
26. Atlantic Water Influence on Europe
Warm Gulf Stream → milder European climate, more precipitation.
27. Wind & Ocean Currents
Both follow patterns shaped by Coriolis force and differential heating.
28. Large Bodies of Water
Moderate nearby weather: cooler summers, warmer winters, more humidity.
29. Hurricanes as Heat Engines
Convert warm ocean heat into wind & rainfall, redistribute energy from tropics to higher latitudes.
30. El Niño & NAO
El Niño: Warmer Pacific → global rainfall & drought changes.
NAO: Atlantic pressure patterns → European/US winter weather variability.
31. Weather Fronts
Cold front: cold air pushes warm → thunderstorms, temperature drop.
Warm front: warm air rises over cold → gentle rain, gradual warming.
32. High vs Low Pressure
High: sinking air → clear, dry weather.
Low: rising air → clouds, precipitation.
33. Center Weather
Low: stormy, cloudy.
High: clear, calm.
Fronts: cold front → abrupt storms, warm front → gradual rain.
34. Air Masses (North America)
cP: continental polar → cold, dry
mP: maritime polar → cold, moist
cT: continental tropical → hot, dry
mT: maritime tropical → warm, humid
35. Why Weather Changes
Movement of air masses, fronts, pressure systems, and water vapor.
36. Engineers & Types
Solve problems using science/tech. Types: civil, mechanical, electrical, software, chemical, aerospace, etc.
37. Engineering Process
Define problem → 2. Research → 3. Design → 4. Build → 5. Test → 6. Improve.
38. Elementary Students & Engineering
Learned through hands-on projects, experimentation, design challenges.
39. Paleoclimatologic Record
Ice cores: past temperature & CO₂
Tree rings: growth patterns, precipitation history
40. Climate Change Mechanisms
Terrestrial: volcanos, earthquakes, continental drift
Extraterrestrial: solar variation, asteroid impacts
Anthropogenic: fossil fuel burning, deforestation, CO₂ emissions
41. CO₂ Impact & Reduction
Increases greenhouse effect → warming.
Reduce by: energy efficiency, renewable energy, plant trees, reduce travel emissions.
42. Potent Heat-Trapping Gas
Methane (CH₄): from livestock, landfills, natural gas leaks; more heat-trapping than CO₂.
43. Humans & Greenhouse Gases
Burning fossil fuels, deforestation, industrial activity.
44. “All Greenhouse Gases Are Bad?”
Disagree: Needed for life (keeps Earth warm), but excess → climate change.
45. Evidence of Past Climate Change
Ice cores, tree rings, sediment layers, fossils.
46. Devastating Impacts of Warmer Climate
Sea-level rise, extreme weather, droughts/floods, biodiversity loss.
47. Ice & Past Climates
Ice cores trap ancient air → tell temperature & CO₂ levels.
48. Key Biomes & Locations
Tropical rainforest: equator, high rainfall
Desert: 30° latitude, low rainfall
Tundra: poles, cold, dry
Grassland: mid-latitudes, seasonal rainfall
Temperate forest: moderate temperature, mid-latitudes
49. Rain Shadow Effect
Mountains block moisture → dry leeward side (desert), wet windward side.
50. Climate Determinants
Latitude, altitude, ocean currents, topography, winds, vegetation, human activity.
51. Köppen Climate Classification
Classifies climates by temperature & precipitation patterns.
Main 5:
Tropical (A): warm, wet → Amazon
Dry (B): deserts → Sahara
Temperate (C): mild → US east coast
Continental (D): cold winters → Midwest US
Polar (E): very cold → Antarctica
Climate zones are complex due to oceans, mountains, elevation, winds.