Blue Marble
Free for grades 6 to 12

Earth and space science your class can touch.

Interactive simulations with questions built in. Students join with a class code and a first name. You see every answer as it lands.

Explore the simulationsSet up a class

Earth from NASA Blue Marble imagery, turned to match the Apollo 17 photograph.

Got a class code?

Six letters and numbers from your teacher. No account needed.

Simulations

Each one runs in a browser on any device, with nothing to install.

Moon phases

MS-ESS1-1

Fly around a real 3D Moon, then stand on Earth and look up. The phase is which part of the lit half faces you.

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The greenhouse effect

MS-ESS3-5 · HS-ESS2-4

Watch sunlight come in and infrared heat try to leave. Change the carbon dioxide and hold the planet at a target temperature.

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Greenhouse planets

MS-ESS3-5 · HS-ESS2-4

Venus is twice as far from the Sun as Mercury. Which one is hotter? Give each planet a blanket of gas and find out.

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Seasons

MS-ESS1-1 · HS-ESS1-4

Fly Earth around the Sun, then stand anywhere on it. Seasons come from the tilt, not from how close we are to the Sun.

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The carbon cycle

MS-LS2-3 · HS-LS2-5 · HS-ESS2-6

Be a carbon atom. Fly an island as carbon dioxide, slip into a leaf and become sugar, then choose: burned for energy, grown into wood, fallen and rotted, or eaten by a cow.

Open the simulation

How it runs in class

  1. 1 · Pick the questions

    Start from a middle school or high school set, or add questions of your own.

  2. 2 · Share the code

    Put it on the board or send the link. Students type a first name and they are in.

  3. 3 · Watch answers arrive

    See which wrong answer is winning. Export everything to a spreadsheet.

Set up a class

Free, with nothing attached.

No ads, no paid tier, no student accounts. The only thing stored about a student is a first name and their answers, and it deletes itself after a year. Read the privacy page.