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...

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

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...

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...

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...