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Education Concept Tracker

A prerequisite knowledge graph of 1590 learning concepts across 8subjects. Track what you've mastered and see exactly what you're ready to learn next — the topics whose prerequisites you've already met. Built on the Marble Open Skill Taxonomy.

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Earth & Space Vocabulary

Science · Space Systems & Earth's History · language

Use technical vocabulary for Earth's motion and the wider universe — rotation, revolution, axis, tilt, orbit, light year, gravitational force, atmosphere, lunar phases, waxing, waning, solstice, equinox, eclipse — and apply these when explaining day and night, the seasons, and the Moon's phases

What mastery looks like

  • Use 'rotation' and 'revolution' correctly to describe Earth's two distinct types of movement and explain what each causes
  • Use 'waxing' and 'waning' to describe the Moon's phases and explain what causes them
  • Apply 'solstice' and 'equinox' correctly when explaining why seasons exist and why day length varies

Check your understanding

Can Earth & Space Vocabulary explain the difference between the Earth rotating and the Earth orbiting the Sun — using the actual science words 'rotation' and 'revolution'?

Prerequisites

None — this is a foundational concept.

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