During these assignments, unless given permission by the teachers to visit other websites, ONLY THE
WEBSITES LISTED BELOW WILL BE USED!  Failure to follow library rules of correct computer/internet
use will result in losing the privilege of using the computers.  Turn in your worksheets to the teacher after each
day of library work.

We will use the WEB SITE below to complete this assignments:
“PROJECT ATHENA” - The address is:   http://www.athena.ivv.nasa.gov

For assignment #14 you will go to the “Athena” web site and answer the following questions:
(when you have finished answering a question, click on the back arrow button to return to the previous page.)

At the Athena Earth and Science home page (www.athena.ivv.nasa.gov), click on SPACE.
This will bring you to the Table of Contents page.
click on “Our Solar System: Planets and their motion”.
1. A planet’s year is the time it takes to revolve around ______________________.
2. A planet’s day is the time it takes to rotate about its ___________________

Click on each of the planets to find out its day length, its year length and who the planet was named after.
   Planet             day length         year length             How the planet got it’s name

3. Mercury
 
 

4. Venus
 
 

5. Earth
 

6. Mars
 
 

7. Jupiter
 
 

8. Saturn
 
 

9. Uranus
 
 

10. Neptune
 
 

11. Pluto
 
 

Go back to the table of contents page.
Scroll down to The Sun and Click on “Learn about Solar Anatomy”.
12. What are the two most common elements found in the sun? _____________    _____________

13. Name eight other elements found in the sun:
 _____________      _____________      _____________      _____________

 _____________      _____________      _____________      _____________

14. What state does the matter within the sun exist in?     a) Solid     b) liquid     c) gas    d) plasma

15. What are the three most common elements found in the earth? __________  __________  __________

16. Name five other elements found in the earth:
  ___________      ___________      ____________      ____________      _____________

17. What are the three most common elements found in the human body?
 ______________        _______________       _______________

18. Name three other elements found in the human body. ___________     ____________    ___________
 

 Scroll down the page to “The Sun’s Structure”
19. The Sun has three interior (inside) regions: the _____________, the ______________, and the
______________.

20. Energy from the sun comes from deep inside where hydrogen combines to form helium, emitting
 energy in the process.  This process is called _____________  _____________.

21. The sun is the source for almost all energy on _______________.
 

Scroll down the page to  “The Sun’s Surface Layer”.
22.  The surface of the sun is called the ___________________ which means (in Greek)  __________________

23.  The temperature at the very top surface of the sun is about ____________ degrees.
 

Go back to the table of contents page, scroll down to and click on “Sunspots”.
24. What is a sunspot?  _____________________________________________________________
 ___________________________________________________________

25. Sunspots can be much larger in diameter than _______________

26. The number of sunspots that are born on the surface of the Sun rises and falls over a period of time and this is
called the solar cycle or “sunspot cycle”.  How many years are there between one maximum sunspot activity and
the next maximum sunspot activity? __________