Factors That Affect Climate - Chapter 21.1 Earth Science Lesson

Unlock the secrets behind why some places are deserts while others are rainforests with this engaging, visual lesson, “Factors That Affect Climate,” from the SAVVAS Lutgens & Tarbuck Earth Science textbook, Chapter 21.1! Students discover the five major climate controls—latitude, elevation, geographic position, ocean currents, and topography—and see how they interact to shape global climate patterns. With a thought-provoking bell work, crystal-clear diagrams of rain shadows and ocean currents, a hands-on “Lost at Sea” sailing voyage activity, and a quick exit ticket, this lesson turns abstract climate science into something students can explain and apply to real places like Phoenix vs. San Diego!

What’s Included:

• Bell Work Activity: Intriguing prompt “Why is Denver cooler than Phoenix even though both receive lots of sunshine?” sparks immediate discussion about elevation and ties directly into the five climate controls.
• Lesson Slides (PowerPoint/Google Slides): Fully illustrated, ready-to-use presentation covering every key concept:
  • What Is Climate? (long-term average weather conditions—usually 30+ years—including temperature, precipitation, and wind patterns; weather = day-to-day vs. climate = long-term pattern)
  • Major Climate Controls (the five factors: latitude, elevation, geographic position, ocean currents, topography)
  • Latitude (affects angle of sunlight: low latitudes = direct → warmer; high latitudes = indirect → cooler; sunlight spreads over larger area at poles)
  • Earth’s Tilt and Energy Distribution (equator receives consistent solar energy year-round; poles receive less → global temperature differences)
  • Elevation (temperature decreases with height; air pressure drops → air expands and cools; average 6.5°C drop per 1,000 meters; mountains cooler than nearby lowlands)
  • Geographic Position (proximity to large bodies of water: coastal/marine climates = milder; inland/continental climates = more extreme temperatures; water moderates temperature)
  • Continental vs. Marine Climates (comparison with real U.S. examples: San Francisco vs. Wichita vs. Virginia Beach)
  • Ocean Currents (warm currents raise nearby land temperatures; cold currents lower them; influence coastal climate and precipitation patterns)
  • Topography (mountains): orographic lifting, rain shadow effect (windward side wet/lush; leeward side dry/warmer/desert conditions)
  • Combining Climate Factors (multiple controls interact; example: coastal city at high latitude still cool despite ocean moderation)

• Video Integration: Engaging “What’s Up Weather: How does topography impact weather?” for a clear visual explanation of orographic lifting and rain shadows.
• Interactive Activities:
  • “Lost at Sea” Sailing Voyage Project — team-based, real-world activity where students plan a round-trip across the North Atlantic using latitude, longitude, winds, and ocean currents to earn the Global Explorer’s Prize (includes map labeling and route planning).
  • Climate-control comparison and rain-shadow diagram practice.

• Exit Ticket: Quick synthesis questions: “Explain how two climate factors work together…”, “Why is climate different in Phoenix compared to San Diego?”, and “Which climate factor has the strongest influence globally? Why?”

Why You’ll Love It:

• Textbook-Aligned: Directly matches SAVVAS Lutgens & Tarbuck Earth Science Chapter 21.1 and builds seamlessly on Chapter 20 (Severe Storms & Weather).
• Highly Visual & Interactive: Gorgeous diagrams, real U.S. climate examples, rain-shadow animations, and the sailing voyage turn climate into an adventure!
• Real-World Connections: Explains everyday differences (Denver vs. Phoenix, coastal vs. inland, rain shadows creating deserts) and ties to global patterns.
• Flexible & No-Prep: Fully editable slides + printable project and exit ticket; perfect for in-class, hybrid, or remote.
• Builds Mastery: Students move from “what is climate?” to analyzing how the five controls interact everywhere on Earth.

Perfect For:

• High school Earth Science classes using the SAVVAS Lutgens & Tarbuck Earth Science textbook (climate unit).
• Lessons on climate vs. weather or global climate patterns.
• Teachers wanting a complete follow-up to Chapter 20 Severe Storms.
• Homeschool, co-op, or STEM classes exploring why different places have such different climates.

Learning Outcomes:

• Define climate and distinguish it from weather.
• Identify and explain the five major climate controls (latitude, elevation, geographic position, ocean currents, topography).
• Describe how latitude and Earth’s tilt create global temperature differences.
• Explain why temperature decreases with elevation and how mountains create rain shadows.
• Compare marine (coastal) vs. continental (inland) climates and the moderating effect of ocean currents.
• Analyze how multiple climate factors interact to shape a region’s climate (e.g., Phoenix vs. San Diego).

Download this complete, ready-to-use Chapter 21.1 lesson today and give your students the “aha!” moment they need to understand why Earth’s climate is so wonderfully varied! (Seamless continuation of the weather and climate unit after Chapter 20.3: Severe Storms.)