Earth Day grew out of the environmental movement in the late 1960s in response to a series of environmental disasters that took lives, marred natural beauty and threatened animal species. An estimated 20 million Americans participated in...

Animated review of environmental legislation and events, produced as a commemoration, in 2010, on the forty-year anniversary of the first Earth Day. Includes a timeline of events. [4:40]

Earth's revolution, rotation, tilt, day and night cycle, and the sun's apparent movement across the earth are explored.

This module explores day and night. Learn about what we see during the day and night and why we see what we see.

Here on Earth a day takes 24 hours. How long are days on other planets in our solar system? Find out here in three different ways, whichever meets your learning style the best.

In this lesson plan from "The Friends of Auntie Litter", (www.auntielitter.org), Earth Day will be explored. This lesson plan is one from the "Take Pride Statewide" series. *This lesson plan is provided by Julie Danley, Pam Walston, and...

Papa and his son Pierre work at a grape farm. Pierre loves to go out and play as soon as the sun comes up. What do you know about the sun and the Earth?

This activity will allow you to model day and night cycles. A rotating student holding a map (provided) models the earth. A lamp is used to model the sun. Numerous worksheets (pdf) and additional website resources are also provided.

Explains how the rotation and the axial tilt of the Earth are responsible for the phenomenon of day and night. Provides information about the Sun, the solar system, and the Earth, and how the circumference of the Earth was first measured...

A instructional activity for third graders in which they learn about the rotation of the Earth on its axis and how this movement creates day and night. They also examine the orbit of the moon about the Earth and the Earth's orbit around...

Find out what all results from Earth revolving around the sun every 365 days as well as the rotation of the Earth every 24 hours.

Explore water's unique properties in the activities here. Includes ideas for starting a chemistry club, ideas for Earth Day, articles, and videos.

An air mass forms when the air over a large region of Earth sits in one place for many days. The air gradually takes on the characteristics of the land or water below it. Where Earth's surface is cold, the air becomes cold. Where Earth's...