Khan Academy
Khan Academy: Codex Leicester: Fossils/mountains, Moon/tides
An excerpt from Leonardo da Vinci's Codex Leicester. Find out how this "Renaissance man" observed the Earth and learned more about tides, moons, and fossils in the mountains.
NASA
Nasa: Space Place: High Tide on Io!
What's it like on Jupiter's moon, Io? Find out in this short, illustrated tutorial.
Other
Bad Astronomy/phil Plait: Tides and Why Our Days Are Getting Longer
Why does the Moon always shows the same face to the Earth? Why is the Moon's rotation period the same as the length of time it takes to orbit the Earth? Why are there two tides a day? These questions and more are answered here.
Enchanted Learning
Enchanted Learning: Earth's Oceans Tides
This site explains what tides are and the difference between Proxigean Spring Tides, spring tides, and neap tides, and how these are formed. Graphic illustrations are provided.
![Text Project: Fyi for Kids: The Tides [Pdf] Article](https://d15y2dacu3jp90.cloudfront.net/images/attachment_defaults/resource/large/FPO-knovation.png "Text Project: Fyi for Kids: The Tides [Pdf] Article")
Text Project
Text Project: Fyi for Kids: The Tides [Pdf]
This FYI for Kids (Volume 5, Issue 3) focuses on the tides. It explains the pull on the earth by the sun and moon and how the tides go in and out.
MadSci Network
Mad Scientist: Why High Tide Away From the Moon or Sun?
An excellent and thorough answer to the often asked question about high tide "bulges" on the side of Earth facing away from the Moon or Sun.
Ducksters
Ducksters: Earth Science for Kids: Ocean Tides
Did you know the rising and falling of the sea level is caused by the gravity of the Moon and the Sun? Kids learn about ocean tides including tidal currents and types of tides on this site.
NASA
Nasa: Astronomy Picture of the Day: Uranus's Moon Ariel
Provides a brief overview of Ariel, one of Uranus's moons. Details how its deep valleys were formed. A NASA astronomy picture of the day.
PBS
Pbs Learning Media: More on Galileo's Big Mistake
Even great scientists make mistakes! This illustrated essay from the NOVA Web site looks at Galileo's theory of the tides, which, while well thought out, was wrong.
Curated OER
Eyes on the Sky, Feet on the Ground: The Earth's Moon
In this online textbook produced by the Smithsonian, students explore the phases of the moon, the moon's orbit, the origin of the moon, and the tides. Includes numerous inquiry-based activities.
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