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mountains 540115 1920

S5 Unit 8: Changes to Earth’s Surface

Canyon de Chelly is a deep sandstone canyon in the high desert of Northern Arizona. Why did it get lower? The action of wind and water over time, along with the slow rising of the surface of Earth, cut Canyon de Chelly into the sandstone rock of Northern Arizona.

space, planet, earth

S3 Unit 8: Earth and Moon

The motion of the Earth and the moon causes repeating patterns that can be seen in nature, including day and night, seasons, and other cycles.