Solar Explorer Guide Solar Explorer
Teacher Facilitation Guide
Grade Level: 3rd - 4th Grade
Duration: 45-50 Minutes
Learning Objective
Students will recognize that the sun is the primary source of energy for Earth's temperature changes by observing how the angle of light (direct vs. indirect) impacts intensity.
Materials Needed
Sidewalk Chalk (Multiple colors)
Clipboards & Pencils
"Shadow Tracking Lab" Worksheets
A Sunny Day (Required!)
05 Minutes
Warm-Up: The Daily Heat
Ask students: "When do you think the sun is strongest and feels the hottest: Morning, Noon, or Evening?"
Teacher Tip: Most students will say noon. Ask them to think about where the sun is in the sky at noon compared to early morning.
05 Minutes
Video: The Flashlight Demo
Watch the "Seasons and the Sun" clip from 1:56 to 2:24.
Key Takeaway:
Direct beam (straight down) = Concentrated, bright, hot.
Angled beam (slanted) = Spread out, less intense, cooler.
20 Minutes
Outdoor Mission: Shadow Tracking
Take the class outside to a paved area. Have students work in pairs to trace each other's shadows with chalk.
Observation Points:
Are the shadows long or short?
Is the sun high or low in the sky?
How does the ground feel?
Direct Connection:
Explain that short shadows come from high, direct sunlight (hotter) and long shadows come from low, angled sunlight (cooler).
15 Minutes
Synthesis: Drawing & Closure
Return inside. Students complete the drawing section on their worksheet comparing Summer (Noon) sun vs. Winter (Morning/Evening) sun.
Discussion Prompt:
"If the sun's energy is spread out over a large area (like the angled flashlight), why is it colder than when it is concentrated in one small spot?"
Sun Spotters Slides Sun Spotters
Tracking the Source of Earth's Energy
Let's Warm Up!
When is the sun's light the strongest and the most intense?
🌅
Morning
☀️
Noon
🌇
Evening
The Flashlight Trick
Embedded media
Watch for:
• How does the shape of the light change?
• Why is direct light hotter?
Concentrated vs. Spread Out
Direct Light
Concentrated in a small spot.Much Hotter!
Indirect Light
Spread out over a large area.Much Cooler!
Shadow Mission
Grab your chalk! We're heading outside to track how the sun hits the Earth right now.
Step 1
Find a partner and a sunny spot on the pavement.
Step 2
Trace your partner's shadow with chalk.
Step 3
Is the shadow long or short? Write it on your lab sheet!
Bringing it Together
"If our shadows were long today, does that mean the sun's energy is concentrated or spread out?"
Summer Sun
High in sky = Short Shadow = Direct & Hot
Winter Sun
Low in sky = Long Shadow = Indirect & Cold
Shadow Tracking Lab Earth Science Expedition
Shadow Tracking Lab
Name:
Date:
Part 1: The Outdoor Shadow Hunt
1. Current Observations
Where is the sun right now?
Low in Sky
High in Sky
Describe your shadow:
Short & Stout
Long & Stretched
2. Quick Sketch
Sketch your partner's shadow exactly as it looks on the ground.
The Big Connection
Based on your shadow, is the sun hitting the ground with Direct Light (concentrated) or Indirect Light (spread out)? Explain your thinking.
Part 2: The Seasonal Comparison
Draw the sun's position and its rays hitting the Earth for both seasons.
☀️ Summer Noon (Hot)
Draw Sun & Rays Above
Sun position: High in the sky
❄️ Winter Noon (Cold)
Draw Sun & Rays Above
Sun position: Low in the sky
Final Verdict: Why is summer hotter than winter even if the sun is out both days?
Sun Spotters Answer Key Answer Key & Reference
Sun Spotters Lesson Series
Teacher Resource
Warm-Up: When is the Sun Strongest?
Expected Answer: Noon
Students should identify that the sun feels hottest when it is directly overhead (noon). If they say "afternoon," clarify that while the air continues to heat up, the intensity of the sunlight is highest when the angle is most direct (closest to 90 degrees).
Shadow Tracking Lab: Part 1
Observation Checklist
• Midday Observations: Shadows should be relatively short; sun should be high.
• Early/Late Day Observations: Shadows will be long; sun will be low on the horizon.
The Big Connection Explaination
"The light is [Direct/Indirect] because the sun is [High/Low]. A [Short/Long] shadow means the rays are hitting the ground [Straight/at an Angle]. When the light is concentrated, the ground gets hotter."
Shadow Tracking Lab: Part 2 (Drawing)
Summer Noon
Sun is directly overhead. Rays are straight lines pointing down. Small, concentrated heating area.
Winter Noon
Sun is low on the horizon. Rays hit the ground at a sharp angle. Light is spread out over a larger oval area.
Final Verdict Answer
"Summer is hotter because the sun is high in the sky, which means the sunlight hits the Earth directly. This concentrates the heat into a smaller, more intense area. In winter, the sun is lower, so the light hits at an angle and spreads its energy over a larger area, making it feel cooler."
