TeacherVision - Lesson Plans, Printables and MoreFree Trial  Member Benefits  Sign In    
Click Here
Search:   
  • Home
  • Grades
  • Subjects
  • Printables
  • Lesson Plans
  • Themes
  • Classroom Management
  • Professional Development
Science (4202 resources)
1f2n3n

FREE Reference - 1st of 3 Free Items

View 2 more resources at no cost, and then subscribe for full access.

Seasons

Seasons are caused by the 23.4-degree tilt of Earth's axis, which alternately turns the North and South Poles toward the sun. Times when the sun's apparent path crosses the equator are known as equinoxes. Times when the sun's apparent path is at the greatest distance from the equator are known as solstices.

The lengths of the days are most extreme at each solstice. If Earth's axis were perpendicular to the plane of Earth's orbit around the sun, there would be no seasons, and the days always would be equal in length. Since Earth's axis is at an angle, the sun strikes Earth directly at the equator only twice a year: in March (vernal equinox) and September (autumnal equinox). In the Northern Hemisphere, spring begins at the vernal equinox, summer at the summer solstice, fall at the autumnal equinox, and winter at the winter solstice. The situation is reversed in the Southern Hemisphere.

Infoplease

Provided by Infoplease.com.

Join TeacherVision
for $39.95 a year and start receiving benefits today!
Free 7-Day Trial

Highlights

November Events

Find educational resources for every day in November. Fill your November lessons with activities for Thanksgiving (Nov. 27).

Math Printables

Browse our most popular math resources in our Printable Rulers & Protractors Slideshow and Number Lines & Place-Value Charts Slideshow.

New Resources

Not only have we added new printable books for Maps & Activities and The Human Body, but we've also focused on new classroom management resources. Try our Homework Excuse Form, Quieting the Class Quickly, Handling Misbehavior During Instruction, and Checking Student Progress in Homework. Take a look at all the new pages added to TeacherVision.

Walden Forums

Wondering about online education at Walden? Get answers to your questions, meet faculty, and learn what it's like to be a Walden student. Click here to check out our free Walden Forums!

2009 Educators' Calendar

There's something worth celebrating every day! Find fun and educationally relevant holidays, events, and celebrations for each day of the year.

Printable Maps

Enrich your lessons with our collection of printable world maps depicting continents, countries, capitals, political boundaries, lines of longitude and latitude, climate zones, oceans, land forms, and more. Plus, browse our collection of Unites States maps.

Daily Printables

Add a TeacherVision widget to your blog, personalized homepage (such as iGoogle or Pageflakes), or social networking sites (such as Facebook). Our widgets feature a different fifth-grade language arts printable or fourth-grade math printable for each day of the year.

Discussion Guide: The Mayflower and the Pilgrims' New World

The teacher's guide for The Mayflower and the Pilgrims' New World, from Penguin Young Readers, is filled with discussion questions, research assignments, and writing activities to engage your students in early American history. Enjoy this book with your students around Thanksgiving or when introducing them to the Colonial Period and Native American History.
About TeacherVision® | Site Map | Advertise | Link to Us | Press Releases | Help | Contact Us
Privacy | Terms of Use | Cancellation Policy

TeacherVision® | MyGradeBook | Quiz Lab | FamilyEducation | FunBrain | InfoPlease | FactMonster
© 2000-2008 Pearson Education, Inc. All Rights Reserved.