I. Write the letter of the correct answer.  
________ 1. What is the center of the solar system?

A. moon                     B. earth                      C. sun                         D. Neptune  

_______ 2. It is the path taken by planets around the sun.

A. orbit                       B. ellipse                     C. gravity                   D. rings  

_______ 3. If you were asked to write about the inner planets, which one should NOT be written about?

A. Venus                    B. Mercury                 C. Earth                      D. Jupiter  
_______ 4. Which planet is considered Earth’s twin?

A. Mars                       B. Moon                      C. Sun                                     D. Venus
 
_______ 5. What planet is closest to the Sun?  
A. Mars                      B. Mercury                 C. Sun                                     D. Venus  
_______ 6. Which is the correct order of the planets from the Sun?

A. Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
B. Mercury, Venus, Earth, Mars, Jupiter, Uranus, Saturn, Neptune
C. Mercury, Saturn, Earth, Mars, Jupiter, Venus, Uranus, Neptune
D. Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Pluto  

________ 7. What is the common characteristic of the inner planets?

A. The distance between them is shorter.                                  
C. They are gaseous.
B. The distance between them is longer.                                               
D. They have rings.  

________ 8. One complete rotation composes one day and one night. Which of the following statements shows the value of time?

A. Play mobile games day and night with friends.
B. Browse the social media and post latest events in life.
C. Watch free movies and television series with friends online.
D. Communicate with friends to get performance tasks and written works done.  

_________ 9. Mercury, Venus, Earth, and Mars are called __________.  

A. Jovian Planets                                        
C. Inner Planets
B. Outer Planets                                           
D. Gas Giants  

________ 10. Which of these describes the distance of the planets from the Sun?

A. changing                          B. different                                 C. freeze                         D. similar  
II. Write T if the statements is true and F if the statement is false. Write your answers on the space before each number.  

__________ 11. The letters AU stand for astronomical unit which is the term astronomers use to measure the distances in the Solar System.

__________ 12. The average distance of the Earth from the Sun is 57 million kilometers.

__________ 13. The amount of energy the planets receive decreases as their distance from the Sun increases.

__________ 14. Neptune is the planet farthest from the Sun with a distance of about 227.9 million kilometers.

__________ 15. Planets closer to the sun have higher temperature than those located farther.

__________ 16. Mars is often referred to as the Red Planet because it is covered with reddish dust and rocks.

__________ 17. The effective temperature of Uranus’ atmosphere is 57K, the coldest in the Solar System.              
__________ 18. Jupiter is the second largest planet in the Solar System with an equatorial diameter of 120,536 km.

__________ 19. Earth is the fifth largest planet in the Solar System with the diameter of 12,756 km.
__________ 20. The surface temperatures on Venus are so high because carbon dioxide in the atmosphere traps energy which causes temperatures near the surface to remain high.   III. Identify what planet is being described.  

_________________21. It is the Red Planet.  
_________________22. It is the second closest planet to the Sun.  
_________________23. It is the planet with a beautiful ring around it.  
_________________24. It is the twin planet of Uranus.  
_________________25. It is the biggest planet in the Solar System.

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;-; THIS IS HARD FULL TEST OF SCIENCE T-T
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