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Mars - The Red Planet
Mars - The Red Planet Real World
Find out why Mars is red.
Grade: 10, 11, 12
Created by: CK-12 Subject: Chemistry Difficulty level: At Grade
Real World
Off the Top
Off the Top Real World
Earth is losing gas from the top of the atmosphere into space.
Grade: 6, 7, 8
Created by: CK-12 Subject: Earth Science Difficulty level: Basic
Real World
What Apollo Astronauts Saw
What Apollo Astronauts Saw Real World
Find out what Apollo astronauts saw on the moon, how scientists have developed hypotheses to explain them, and how they plan to test these hypotheses.
Grade: 9, 10, 11, 12
Created by: CK-12 Subject: Earth Science Difficulty level: At Grade
Real World
Why is the Sky Blue (or Red)?
Why is the Sky Blue (or Red)? Real World
Refraction is the reason the sky is blue or red at sunrise and sunset. Refraction is explained.
Grade: 6, 7, 8
Created by: CK-12 Subject: Earth Science Difficulty level: Basic
Real World
How Much Water Is There?
How Much Water Is There? Real World
Looks at water supply worldwide, how much is fresh and salt and where the reserves are located.
Grade: 9, 10, 11, 12
Created by: CK-12 Difficulty level: At Grade
Real World
Smoggy Sunsets
Smoggy Sunsets Real World
Students will determine the optimal conditions for a colorful sunset and the effect smog or other atmospheric changes can have on the color produced.
Grade: 6, 7, 8, 9, 10, 11, 12
Created by: CK-12 Difficulty level: At Grade
Real World
Imagine Earth with No Atmosphere
Imagine Earth with No Atmosphere Real World
Discover how Mars once resembled Earth, with an atmosphere, running water, and possibly life, but then lost its atmosphere.
Grade: 9, 10, 11, 12
Created by: CK-12 Subject: Earth Science Difficulty level: At Grade
Real World
The Cost of Crops
The Cost of Crops Real World
Can growing plants be bad? It all depends.
Grade: 6, 7, 8
Created by: CK-12 Difficulty level: At Grade
Real World
La Biósfera
La Biósfera Read
Grade: 7, 8
Created by: CK-12 Subject: Life Science Difficulty level: At Grade
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Cómo se formó la Tierra
Cómo se formó la Tierra Read
Grade: 9, 10
Created by: CK-12 Subject: Biology Difficulty level: At Grade
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