Test a phase-wheel model · Made by Matt

Lesson overviewGROW · Week 7

Test a phase-wheel model

Same Moon. Three checked views.

Use evidence to explain new, half and full Moon.

The Moon viewed from Earth, with light and dark surface features.

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StarterGROW · Week 7

Retrieve the lit-side rule

Where does moonlight come from?

What stays round while the Moon looks different?

Choose drawings, pre-cut circles or adult-operated kit.

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I Do · learn and modelGROW · Week 7

Prepare your model safely

Use a ball, low-power torch and three drawn/card circles.

Keep the torch direction fixed; never shine it at eyes.

Keep room light, or choose the still-diagram route.

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I Do · learn and modelGROW · Week 7

Check three positions

Near the light direction: check the new-Moon view.

To the side: check a half-Moon view.

Opposite the light: check the full-Moon view.

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I Do · learn and modelGROW · Week 7

Make your three-view strip

Draw three equal circles or arrange pre-cut examples.

Shade the part not seen lit; label new, half and full.

Keep every circle the same round shape.

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I Do · learn and modelGROW · Week 7

Explain what changed

Three schematic views from Earth show a dark new Moon, a half-lit Moon and a full lit disc. The model ball keeps its shape as the visible lit fraction changes. — Original teaching-pack diagram and labels.

Read the slide text

Three schematic views from Earth show a dark new Moon, a half-lit Moon and a full lit disc. The model ball keeps its shape as the visible lit fraction changes. The visible lit part changed because our view of the Moon's sunlit half changed. The ball did not change shape. New Half Full View from Earth • schematic

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I Do · learn and modelGROW · Week 7

Pause for a shared check

Ask an adult or chosen partner to use the same viewpoint.

Check one view against its label.

Did the ball change shape, or the visible lit part?

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I Do · learn and modelGROW · Week 7

Correct one label or view

Correct one phase label or shaded circle.

Explain what your model showed.

Add a model limit if this is your stretch route.

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I Do · learn and modelGROW · Week 7

Reset the room and kit

Restore agreed room lighting.

Return ball, torch, cards and pencils.

Keep your labelled strip and explanation.

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I Do · learn and modelGROW · Week 7

Say what helped or hindered

Did the model or still drawing help you understand?

Would a different light level, label or explanation help?

Point, sign, speak privately, or pass.

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I Do · learn and modelGROW · Week 7

Check the agreed change

You asked for_____. We changed_____.

Did it help? What else needs explaining?

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Exit checkGROW · Week 7

Exit: choose your explanation

Supported: does the Moon make its own visible light?

Standard: how long is one orbit around Earth?

Stretch: why are ordinary phases not Earth's shadow?

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Exit checkGROW · Week 7

Check and keep one improvement

Moonlight is reflected sunlight.

One orbit is about 27.3 days; phase cycle about 29.5 days.

Ordinary phases come from our view of the sunlit half.

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Use the controls or left and right arrow keys. Printing includes pupil content; model answers remain separate.