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LESSON 011 • Earth in Space

Earth Is a Planet

Earth is the third planet from the Sun and the home world of every known living thing.

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LIVE VISUAL LAB
HOME

Interactive teaching model • relationships are controlled; scale, distance or timing may be simplified and are labeled here.

The big idea

Earth is the third planet from the Sun and the home world of every known living thing.

It is a rocky, nearly spherical world with oceans, continents, ice, air and an active interior.

HOW SCIENTISTS KNOW

Spacecraft images, gravity measurements, global travel and satellite data reveal Earth as a planet.

WORDS TO OWN
Earthplanetoceancontinent
A COMMON WRONG MODEL

Earth Is a Planet is only a name or picture to memorize.

REBUILD IT WITH EVIDENCE

Connect earth is a planet to the observable relationship, evidence and system described in the lesson.

A scientifically true sentence can still create a false picture. This repair makes the relationship visible.

Take learning into real life

Try it together

Use a ball as Earth and a stationary flashlight as the Sun. Rotate only the ball, mark one home location and explain what changes there. Connect what you notice to earth is a planet using Earth and planet.

GREEN SAFETYOrdinary low-risk activity with normal caregiver awareness.
01TALKWhat do you predict before we try it?
02LOOKWhat changed? What stayed the same?
03EXPLAINWhich evidence supports your idea?

Check understanding

Which statement best explains earth is a planet?

Choose the explanation that matches the evidence—not just the most familiar words.

Three things to remember

  1. ✓Earth is the third planet from the Sun and the home world of every known living thing.
  2. ✓It is a rocky, nearly spherical world with oceans, continents, ice, air and an active interior.
  3. ✓Evidence matters: spacecraft images, gravity measurements, global travel and satellite data reveal earth as a planet.