Revolution, Rotation,
Download
1 / 38

Revolution, Rotation, & Seasons - PowerPoint PPT Presentation


  • 176 Views
  • Uploaded on

Revolution, Rotation, & Seasons. What do you already know?. The sun has the following effects on earth:. Heats the earth ’ s surface & atmosphere. Causes winds & the water cycle. Lights half of the earth ’ s surface at a time. Rotation: The spinning motion of an object on its axis.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Revolution, Rotation, & Seasons' - breck


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

What do you already know?

The sun has the following effects on earth:

Heats the earth’s surface & atmosphere

Causes winds & the water cycle.

Lights half of the earth’s surface at a time.


Rotation:

The spinning motion of an object on its axis


What do you already know…

about Earth’s day/night cycle?

The earth rotates on its axis.

  • That takes about 24 hours

  • It causes our day/night cycle.



Revolution:

The movement of an object around another object


What do you already know…

about the earth’s motion around the sun?

It takes 365 ¼ days (one year)

Earth’s motion around the sun is called a “revolution”

Earth’s orbit is not circular…it’s elliptical.


The earth’s tilt on its axis remains constant throughout the year.


Revolution or Rotation?




The top is…

Rotating



Mickey’s car is…

Revolving


The ball is…

Rotating


The Earth is…

Revolving around the sun


But, the Earth is also…

Rotating on its axis


What do you already know…

about seasons on Earth?

How sunlight hits the earth depends, in part, on latitude.

Seasons are caused by Earth’s tiltandEarth’s revolution around the sun.

Seasons are NOT caused by earth’s distance from the sun.



1.Summer is the opposite of ____________

2.Summer in the northern hemisphere starts on this date____________

3.The first day of summer is the _______est day of the year

4.The first day of summer is also called the _______ _______


5.When it is summer in the northern hemisphere, it is ____________ in the southern hemisphere.

6.When it is summer in either hemisphere, the temperatures will be ___________.

7.When it is summer in the northern hemisphere, the north tilts ________ the sun.


8.Winter is the opposite of ____________ in the ____________

9.Winter in the northern hemisphere starts on this date____________

10.The first day of winter is the _______est day of the year

11.The first day of winter is also called the _______ _______


12.When it is winter in the northern hemisphere, it is ____________ in the southern hemisphere.

13.When it is winter in either hemisphere, the temperatures will be ___________.

14.When it is winter in the northern hemisphere, the north tilts ___________ the sun.


15.Spring is the opposite of ____________ in the ____________

16.Spring in the northern hemisphere starts on this date____________

17.On the first day of spring we have _____ hours of daylight.

18.The first day of spring is also called the _______ _______


19.When it is spring in the northern hemisphere, it is ____________ in the southern hemisphere.

20.When it is the 1st day of spring in either hemisphere, the sun shines directly over the ___________.


What do you already know… ____________ in the

about solstices?

The “solstice” is the day of the year when sunlight is furthest north or south of the equator.

Our summer solstice occurs on June 21st, the first day of summer.

Our winter solstice occurs on December 21st, the first day of winter.


Northern Summer Solstice ____________ in the


Southern Summer Solstice ____________ in the


What do you already know… ____________ in the

about equinoxes?

The “equinox” occurs twice a year when the sun is directly overhead at the equator.

On the equinox, the hours of daylight equals the hours of darkness.

Seasons in the northern & southern hemispheres are opposite.


What do you already know… ____________ in the

about equinoxes?

The “equinox” occurs twice a year when the sun is directly overhead at the equator.

Our vernalequinox occurs around March 21st, the first day of spring.

Our autumnalequinox occurs around September 21st, the first day of fall.


Equinoxes ____________ in the


Test yourself… ____________ in the


21.Season for CT? Month? ____________ in the 22.Season for Australia? Month? 23.Hours of light at north pole?

24.Hours of light at south pole?


25.Season for CT? Month? ____________ in the 26.Season for Australia? Month? 27.Hours of light at north pole?

28.Hours of light at south pole?


29.Season(s) for CT? Month(s)? ____________ in the 30.Season(s) for Australia? Month(s)? 31.Hours of light at north pole?

32.Hours of light at south pole?


B. ____________ in the

C.

A.

D.


ad