1 st Assessment Task

1. 1st Assessment Task By: James 6A

2. Definition of Celestial Objects • Celestial objects : • Pertaining to the sky or visible heaven, or to the universe beyond the earth’s atmosphere, as in celestila body

3. Characteristics of each celestial objects • Star : • Are seen in the same relative positions year after year • Star are not precisely fixed ; they move at various speed, measured as changes of direction in fractions of a second of arch per year

4. Asteroids : • Are rocky, metallic bodies that revolve around the Sun. • Has vary in size and composition. • the largest asteroid is ceres which has a diameter of 623 miles ( 1,003 km ) • Comets : • The tails of bright comates can be 150 km. • Are called dirty snowball because they are mixtures of ice and dust.

5. Sun • Contains 99.85 % of the mass in the solar system • Is the main sequence star, with a spectral class of G2 meaning that it is somewhat bigger and better than the average star but far smaller than a red giant star. • It’s five billion years old • Rotate faster at it’s equator

6. Planet • Orbit a star • Doesn’t produce energy through nuclear fusion • There are 8 planets • Compose of rock called rocky planets like earth • Made of gaseous material ( Jupiter ) • Made of icy bodies

7. The different between Earth and other Planets • Earth : • Is the third planet from the sun • It is formed 4,54 billion years ago • The biggest of all terrestrial planets • The diameter of Earth is 7,926 miles • The circumference measured around the equator is 24, 901 miles • 30 % of earth surface covered with land, while 70 % is covered with land.

8. Mars • Is the fourth planet from the Sun • It’s has the biggest mountain in this universe called Olympus Mons ( 3x higher than Mt. Everest ) • More than 140 million miles from the Sun. • Smaller than planet Earth • It’s take longer than Earth to takes orbit the Sun it takes : 687 Earth days days to take • Has 2 moons Phobos and Deimos

9. Jupiter • Is a giant planet / largest planet of the solar system • The pull of gravity is much stronger than Earth • Not surrounded by air like Earth • Covered by a thick layer of clouds 11,000 miles deep • Formed into brightly coloured bands – orange, red, white, and tan • The temperature is about 240o below zero fahrenheit • Does not have solid rock surface

10. Contains hydrogen and helium • The core of Jupiter is solid ; made up iron and rock like planet Earth • Jupiter take 12 times as long as Earth to complete one orbit • Length of day : 9,9 Earth hours • Have 66 moons

11. Neptune • Average distance from the Sun 2, 795,000,000 miles ( 4,498,250,000 km) • Equatorial diameter : 30, 775 miles • Length of day : 16 Earth hours • Average surface temperature : - 353o F ( - 214o C ) • Moons : 13 • Position from the Sun in orbit : 9th

12. Uranus • Average distance from the Sun : 2, 784, 000, 000 miles • Position from the Sun in orbit : 8th • Equatorial diameter : 31, 760 miles ( 51, 120 km) • Length of day : 17,9 Earth hours

13. Saturn • Average distance from the Sun : 890,800,000 miles • Position from the Sun in orbit : 7th • Equatorial diameter : 74,900 miles • Length of day : 10 hours • Length of year 29,46 Earth years • Average surface temperature : - 218o F ( - 139o C ) • Moons : 62 moons

14. Venus • Average distance from the Sun : 67,230,000 miles • Position from the sun : 2nd • Equatorial diameter : 7,520 miles • Length of year : 243 earth days • Length of day : 225 earth days • Average surface : 462o C

15. Mercury • Average distance from the sun :35,980,000 miles • Position from the sun : 1st • Equatorial diameter : 3.030 miles • Length of day : 58 earth days • Length of year : 88 earth days • Moons : 0

16. Similarities between Earth and other planets • All planets orbit a star • There are all in solar system • They have gravity • They have cleared it’s orbital neighborhood • They have core, and ontercore, mantle, lithosphere, crust, orbit around stars, made up matter

17. The reason why Earth is the best planet to live • It has liquid water, not too much to cover the mountains, not so like dry desert as Mars or Venus • The slip sliding movement of the Earth’s crust have created the planet’s towering mountains ranges and plummeting ocean depths • The Earth’s plates tectonics allow for carbon-silicate cycle to operate over geological time scales; keep the surface temperature around the liquid water • Its has right size, not too small, not too big • Earth’s moon stabilized our planet’s rotation, preventing drastic movements of the poles that could cause massive changes in climate • Earth’s moon help the ocean tides

18. Dwarf Planets • Ceres • Position from the Sun in orbit: 5th • Length of day: 9.1 Earth hours • Length of year: 4.6 Earth year • Moons: 0 Pluto 1. Position from the Sun in orbit: 10th 2. Length of day: 6.4 Earth Days 3. Length of year: 248 Earth year 4. Moons: 5

19. Dwarf Planets • Haumea • Position from the Sun in orbit: 11th • Length of day: 4Earth hours • Length of year: 282 Earth year • Moons: 2 Makemake • Position from the Sun in orbit: 12th • Length of day: 22.5 Earth hours • Length of year: 305 Earth years • Moons: 8

20. Dwarf Planets • Eris • Position from the Sun in orbit: 13th • Length of day: 25.9 Earth hours • Length of year: 561 Earth years • Moons: 1

21. Bibliography • www.scholastic.com • www.wikipedia.com • National geographic almanac book 2014