The Sun's Apparent Path

Active learning works for this topic because students must observe and record real shadows over time to connect Earth’s rotation to the Sun’s apparent path. Hands-on tracking helps them move from abstract ideas to concrete evidence they can measure and discuss.

• 3rd Year
• Exploring Our World: Scientific Inquiry and Discovery
• 4 activities
• 25 min–60 min

Learning Objectives

1. Observe and record the direction of the Sun's apparent movement across the sky at specific times.
2. Explain how Earth's rotation causes the Sun to appear to move from east to west.
3. Differentiate between Earth's rotation on its axis and its orbit around the Sun.
4. Construct a functional sundial to indicate the time of day based on shadow position.
5. Analyze the relationship between shadow length and the Sun's position in the sky.

Inquiry Circle

⏱ 60 min·Small Groups

Outdoor Tracking: Shadow Sticks

Place sticks vertically in the ground at schoolyard spots. Have students measure and record shadow lengths and directions every hour from morning to afternoon. Groups sketch paths on paper and compare results at class end.

Prepare & details

Analyze why the Sun appears to move across the sky from east to west.

Facilitation Tip: During Outdoor Tracking: Shadow Sticks, remind students to mark the ground carefully so their measurements are consistent and comparable over time.

Setup: Groups at tables with access to source materials

Materials: Source material collection, Inquiry cycle worksheet, Question generation protocol, Findings presentation template

• Analyze
• Evaluate
• Create
• Self-Management
• Self-Awareness

Inquiry Circle

⏱ 30 min·Pairs

Craft Activity: Sundial Construction

Provide paper plates, straws, and markers. Students align straws north-south, mark hour positions based on shadow casts, and test outdoors. Discuss accuracy and time-telling uses in pairs.

Prepare & details

Differentiate between the Earth's rotation and its orbit around the Sun.

Facilitation Tip: For Craft Activity: Sundial Construction, demonstrate how to align the gnomon with true north using a compass or a reference point.

Setup: Groups at tables with access to source materials

Materials: Source material collection, Inquiry cycle worksheet, Question generation protocol, Findings presentation template

• Analyze
• Evaluate
• Create
• Self-Management
• Self-Awareness

Inquiry Circle

⏱ 25 min·Whole Class

Model Demo: Globe Rotation

Use a globe and lamp as Sun. Rotate globe slowly while students note shadow shifts on a taped figure. Record observations, then link to real sky paths in whole-class talk.

Prepare & details

Construct a sundial to tell time using the Sun's position.

Facilitation Tip: In Model Demo: Globe Rotation, turn the globe slowly so students connect the shadow changes they observed outside to the model’s rotation.

Setup: Groups at tables with access to source materials

Materials: Source material collection, Inquiry cycle worksheet, Question generation protocol, Findings presentation template

• Analyze
• Evaluate
• Create
• Self-Management
• Self-Awareness

Inquiry Circle

⏱ 35 min·Individual

Data Graph: Path Plotting

Students plot class shadow data on large charts, connecting points to show arc. Compare morning and afternoon paths. Extend by predicting next-day shadows individually.

Prepare & details

Analyze why the Sun appears to move across the sky from east to west.

Facilitation Tip: When completing Data Graph: Path Plotting, have students use different colors for each observation day to highlight seasonal changes.

Setup: Groups at tables with access to source materials

Materials: Source material collection, Inquiry cycle worksheet, Question generation protocol, Findings presentation template

• Analyze
• Evaluate
• Create
• Self-Management
• Self-Awareness

Teaching This Topic

Experienced teachers approach this topic by starting with direct observation outdoors, which grounds the concept in students’ daily experience. Avoid explaining the Sun’s motion abstractly before students have data from their own measurements. Research shows that building the sundial after shadow tracking strengthens the connection between evidence and explanation, making the model more meaningful.

What to Expect

Successful learning looks like students accurately predicting shadow directions at different times, explaining why shadows change length and direction, and using their data to explain the Sun’s daily path. Groups should articulate the link between Earth’s rotation and the Sun’s motion clearly.

Watch Out for These Misconceptions

Common Misconception

During Model Demo: Globe Rotation, watch for students believing the Sun moves around Earth daily.

What to Teach Instead

Use the globe to slowly rotate it while students observe how the shadow stick’s shadow moves, then ask them to explain what is really moving and why the shadow shifts.

Common Misconception

During Outdoor Tracking: Shadow Sticks, watch for students thinking shadows always point the same way.

What to Teach Instead

Have students compare their shadow directions at 9am, noon, and 3pm, then ask them to explain why the direction changes using their recorded data.

Common Misconception

During Data Graph: Path Plotting, watch for students assuming the Sun’s path is the same every day.

What to Teach Instead

Guide students to compare their weekly graphs, pointing out differences in shadow length and path, then connect these changes to Earth’s orbit tilt during a class discussion.

Assessment Ideas

Exit Ticket

After Outdoor Tracking: Shadow Sticks, provide students with a blank diagram of the sky and ask them to draw the Sun’s path from sunrise to sunset, labeling East and West. Then, have them write one sentence explaining why the Sun appears to move based on their shadow data.

Quick Check

During Outdoor Tracking: Shadow Sticks, ask each student to hold up their recording sheet and point to the Sun’s position in the sky. Then, have them identify the direction their shadow is pointing and explain why it points that way using their observation data.

Discussion Prompt

After Craft Activity: Sundial Construction, facilitate a discussion using the prompt: 'Imagine you are explaining to a younger student why the Sun seems to move across the sky. What are the two main ideas you would share, and how would you use your sundial to help them understand?' Collect responses to assess their understanding of Earth’s rotation and shadow tracking.

Extensions & Scaffolding

• Challenge: Have students predict and test shadow lengths at 6am and 6pm using their data patterns, then compare predictions to actual observations the next day.
• Scaffolding: Provide pre-labeled sky diagrams with East and West for students to complete during shadow stick recording.
• Deeper exploration: Invite students to research how ancient cultures used shadow tracking to create calendars, then present their findings to the class.

Key Vocabulary

Apparent Path	The path an object appears to take from an observer's perspective. For the Sun, this is its movement across the sky from sunrise to sunset.
Earth's Rotation	The spinning of the Earth on its axis, which takes approximately 24 hours to complete. This causes day and night.
Earth's Orbit	The movement of the Earth in a path around the Sun, which takes approximately 365 days to complete. This causes the seasons.
Sundial	A device that tells time by the position of a shadow cast by the Sun. It uses a gnomon to cast the shadow onto a marked surface.
Gnomon	The part of a sundial that casts a shadow. It is often a stick or a triangular piece of metal or wood.