Space, Earth, Sky

Overview

Lesson 9 of 10 in the Manitoba Science Year Overview unit. Students use a light source and spheres to model Earth–Sun–Moon relationships, explain rotation and revolution, and connect these movements to observable patterns such as day and night, seasons, and Moon phases.

Learning intentions

• Students will be able to use a model to explain patterns in the sky.
• Students will be able to distinguish rotation from revolution and relate each to Earth’s movements.
• Students will be able to identify strengths and limitations of a scale model.
• Students will be able to revise an explanation when observations provide new evidence.
• Students will communicate a scientific explanation using evidence, diagrams, and appropriate vocabulary.

Success criteria

• I can explain the difference between rotation and revolution.
• I can use a model to explain day and night, seasons, or Moon phases.
• I can describe at least one way my model is not to scale.
• I can use an observation or evidence to improve my explanation.

Curriculum links

• Developing and using models to describe natural systems and observable patterns.
• Planning and carrying out investigations, recording observations, and using evidence.
• Reading informational science texts, interpreting diagrams, and explaining ideas clearly in writing and discussion.
• Using measurement, proportional reasoning, and basic calculations to represent scale and compare quantities.

Lesson structure (60 minutes)

1. 0–7 minutes – Engage: What changes in the sky? Open with the opening sky-pattern question. Display images of the Moon, a sunset, and stars, then ask: “What changes, and what stays the same?” Students think independently, discuss with a partner, and share one observation. Record ideas without correcting them yet.

2. 7–15 minutes – Build shared understanding Use the movement and vocabulary slides to review astronomy, axis, rotation, revolution, orbit, gravity, satellite, phase, season, star, and planet. Demonstrate rotation by slowly turning in place and revolution by walking around a central point. Emphasize that Earth’s rotation causes day and night, while its revolution around the Sun takes about one year; Earth’s tilted axis helps explain seasonal patterns.

3. 15–20 minutes – Misconception probe Students complete the first section of the space model investigation sheet by choosing whether each statement is agree, disagree, or unsure. Include statements such as “The Sun moves around Earth each day,” “The Moon makes its own light,” and “A season happens because Earth is much closer to the Sun.” Students briefly justify one response. Do not give answers yet.

4. 20–42 minutes – Model Earth, Sun, and Moon Organize 25 students into groups of four or five. Provide a flashlight or lamp, a large sphere for the Sun, a globe or ball for Earth, and a small sphere for the Moon. Follow the hands-on modeling instructions. First, model day and night by rotating Earth. Next, model Earth’s revolution and tilted axis to discuss seasons. Finally, use the small sphere to model Moon phases, reminding students that the Moon reflects sunlight. Students complete the observation table and draw one model in the space model investigation sheet.

5. 42–50 minutes – Evidence-based explanation Groups prepare a short explanation using the sentence frame: “We observed ____. This happens because ____. Our model shows ____.” Each group explains one pattern: day and night, seasons, or Moon phases. Classmates identify the evidence used and ask one respectful question. Use the discussion and explanation prompts to guide feedback.

6. 50–56 minutes – Revise and consider scale Students return to one misconception from the opening probe and revise their answer in the space model investigation sheet. Ask: “What does our model show well? What can it not show accurately?” Guide students to recognize that models may simplify distance, size, speed, and motion. Advanced students may calculate a simple scale relationship using provided classroom measurements.

7. 56–60 minutes – Exit assessment and preview Display the final reflection slide. Students complete the final response: “Rotation is different from revolution because ____. One sky pattern I can explain is ____. One limitation of our model is ____.” Collect worksheets and explain that the next lesson will use evidence to create a final space model or multimedia explanation.

Resources

• the space, Earth, and sky teaching deck
• the space model investigation sheet
• Flashlight, lamp, or other safe light source for each group
• Globe or medium ball for Earth
• Large ball or sphere for the Sun
• Small foam ball, clay ball, or bead for the Moon
• Wooden skewers or pencils to represent axes, if safe and available
• Darkened area or paper screens to improve visibility
• Chart paper or board
• Pencils, colored pencils, and rulers

Assessment

• Listen for accurate use of rotation, revolution, orbit, axis, phase, and season during group modeling.
• Review observation tables, diagrams, misconception revisions, and explanations for evidence-based reasoning.
• Use the exit response to identify students who need additional support before the final summative task.

Differentiation

• Provide tactile models, labeled diagrams, gestures, captioned simulations, and oral rehearsal before writing. Pair EAL students with supportive peers and display sentence frames.
• Allow students to explain orally, draw and label, or use a short recorded explanation instead of completing every written response.
• Reduce scale calculations to comparisons such as “larger than,” “closer to,” and “farther from” for students who need support; provide a worked example.
• Challenge advanced students to calculate a simple orbital or size relationship, investigate local light pollution, or compare sky observations with respectful, appropriately sourced Indigenous knowledge systems.