Friday, September 22, 2017

So Long Summer :: Hello Autumn!

FACT: Seasons change as we orbit the sun.

Spring • Summer • Autumn • Winter

Twice a year, around March 20 or 21 and Sept. 22 or 23, our sun shines directly over the equator. That event marks the beginning of spring or fall. What is the equator?

Public Domain photo

  1. an imaginary line drawn around the earth equally distant from both poles, dividing the earth into northern and southern hemispheres and constituting the parallel of latitude 0°.

In March when the sun shines directly over the equator, the event is called the spring or vernal equinox. In September when the sun shines directly over the equator, the event is called the fall or autumnal equinox

The Autumnal Equinox will occur in Los Angeles, California, U.S.A. on Friday, September 22, 2017 at 1:02 P.M.

Things to look for in fall:

1. Deciduous (di•si•jo͞o•əs) trees will change color and drop all their leaves. Evergreen trees will not. Evergreen trees will stay forever green. :-) Why do the leaves of deciduous trees change color? Use World Book Online to research. Remember, do NOT copy sentences. That is plagiarism, and it is against the law! Take notes, and then turn your notes into your own sentences. 

Photo by Grandma Barb

2. On the equinox, there are exactly 12 hours of daylight and 12 hours of night. The day and night hours are equal. However, as we continue into fall, the days will get shorter and the night hours will get longer. This pattern will continue until we reach the winter solstice. That is the longest night of the year and marks a new season, winter.

3.  Because the northern hemisphere is now tilted away from the sun, the days will start to become cooler. People will change their behavior. What sorts of behavioral changes will your family make as the days get shorter and cooler?  (In southern California, we have mild climate. We don't get too cold in our community.)

There are many fall festivals or holidays. Watch the BrainPop video about fall to learn about the many harvest festivals celebrated. Do you celebrate any of these autumn holidays? If so, please share so we can learn from you! 

Check out the FREE BrainPop video about Fall. 

4. Some animals in the northern hemisphere will change their behavior. As fall leads to winter, some animals migrate, or move, to a warmer area. Others try to fatten up for the winter they know is coming. 

Again, BrainPop Jr. has a FREE video about fall. 


Share some fun facts about fall!
Did you use BrainPop or World Book Online as a reference? 

If you are in the southern hemisphere, tell us what season you are enjoying! How are you changing your behavior? 


  1. @ class

    I watched the Fall video and learned:

    1. That Fall, or Autumn, is the season between summer and winter.

    2. In most places, fall is cooler than summer, but warmer than winter.

    3. In the fall, days are shorter then in the summer, in the fall, the days are shorter
    than in the summer and there are fewer hours of

    4. It takes a years for Earth to orbit, or go
    around the sun. Our planet is tilted at an angle.
    Earth's tilt and orbit cause the seasons to change.

    6. Some birds migrate and fly to warmer places.
    Butterflies,buffaloes,and whales migrate to warmer places, too.

    Happy Fall Everyone! What did you do for your first day of fall?

  2. Hello Mrs. Yollis and class,

    While this is a very busy time of year for me, I wanted to take time out to comment on your blog post. I find the idea of equinoxes and solstices fascinating. They mark the change of seasons around the world as we travel through summer, autumn (fall), winter and spring.

    The seasons are made possible because of the world's tilt to its orbital path around the sun. Can you imagine what might happen if there was no tilt? Seasons wouldn't change with the time of year. The poles would probably be permanently in twilight and the sun always overhead at the equator. I think that would be quite boring and might make farming more difficult. What do you think?

    I prepared a short post in answer to your post. You'll find it at

    Ross Mannell
    Teacher (retired), N.S.W., Australia


* * *
Getting feedback is important to our writers. Let us know what you liked or what you learned.

Steps to Comment:

1. Write your comment in the box below. Be sure that you have proofread it for spelling, grammar, punctuation, and capitalization. Students should have a parent check it!

2. Choose an identity. (If you have a gmail account, use it. If not, choose name/url. You can leave the url blank if you do not have a blog.)

3. Click "Publish your Comment". You may preview your comment before publishing if you'd like.

Important: All comments MUST be approved by me.
:-) Mrs. Yollis