Sunday, May 10, 2015

8th Science - 5/11/15


https://docs.google.com/document/d/1zhQxR8vXZNip4lr5QzbVyViuM8R9kZgV7YSj9BvrLF4/pub

Homework:

5/13 - Copy vocabulary words in NB - Test on Thursday.

1.  constellations - a group of stars named after animals, characters in mythology, or familiar objects.

2.  galaxy - a system of millions or billions of stars, together with gas and dust, held together by gravitational attraction.

3.  Nebula - a cloud of gas and dust in outer space, visible in the night sky either as an indistinct bright patch or as a dark silhouette against other luminous matter.

4. Photosphere - The directly visible outer layer or atmosphere of a star, especially of the sun. pho′to·spher′ic

5. Light Year - a unit of astronomical distance equivalent to the distance that light travels in one year, which is 9.4607 × 1012 km (nearly 6 trillion miles).

6. Supernova - a star that suddenly increases greatly in brightness because of a catastrophic explosion that ejects most of its mass.

7.  Supergiant - Any of various very massive, large, and bright stars, such as Betelgeuse or Rigel, having a luminosity that is thousands of times greater than that of the sun.

8. Black hole - a region of space having a gravitational field so intense that no matter or radiation can escape.

9.  chromosphere  - is an outer layer of the sun. This layer can only be viewed during an eclipse when the rest of the sun is blocked.

10. Sunspots - a spot or patch appearing from time to time on the sun's surface, appearing dark by contrast with its surroundings.

11.   binary system is a system of two objects in space (usually stars, but also brown dwarfs, planets, galaxies, or asteroids) which are so close that their gravitational interaction causes them to orbit about a common center of mass.

12. Corona - A faintly colored luminous ring appearing to surround a celestial body (such as the Moon or Sun) that is visible through a haze or thin cloud, caused by diffraction of light from suspended matter in the intervening medium

13.  prominence is a large, bright, gaseous feature extending outward from the Sun's surface, often in a loop shape.

14. Elliptical galaxies range from circular (remember, a circle is an ellipse!) to long, narrow, and cigar-shaped.

15.  Know the colors of the stars and which one is the hottesst.