|Introduction to Astronomy|
Can You Answer the Following Questions?
1. State a concise definition for the subject of astronomy.
2. The quantity of matter per unit area (density) throughout the universe gives astronomers a feeling about how that material is _______________.
3. Precession, rotation, and revolution of the earth define three different _______________ which affect the earth and the positions of other objects in the sky.
4. The spinning of a body about its axis is called _______________.
5. The motion of one body around another is called _______________.
6. The four physical states in which matter can exist are called a _______________, _______________, _______________, and a _______________.
7. Ions and electrons in free association define a _______________.
8. _______________ consist of atoms or molecules which have lost or gained one or more electrons.
9. The big bang, steady state, star collision, and nebular theories are models which detail the _______________ of the universe or the solar system. The field of astronomy which investigates the evolution of the universe is called _______________.
10. Knowing what elements comprise an astronomical body tells one about that object's _______________.
11. The primary elements which compose the earth are oxygen, silicon, and iron. This description is _______________ in nature since it does not detail numerical amounts.
12. The earth's atmosphere is composed of 78% nitrogen, 21% oxygen, 1% argon. This represents a _______________ statement.
13. By far the most abundant element in the universe is called _______________. About _______________ percent of the universe is comprised of this element?
14. The most abundant element in the universe is composed of one _______________ and one _______________.
15. The velocity of light in a vacuum is equivalent to ______________.
16. A light year measures ___________________________________________.
17. _______________ The universe was created from a primordial atom which somehow exploded.
18. _________________________ All of the various forms of energy which travel at the speed of light are embraced by this term.
19. _______________ In this theory, the universe is infinitely old and infinitely expanding.
20. _______________ The name of the sun and its family of planets goes by this term.
21. _______________ Earth's orbit around the sun is defined by this plane.
22. _______________ These objects form the basic aggregate of matter in the universe and are composed of stars which can number from the millions into the trillions.
23. _______________ The average distance from the earth to the sun in miles or kilometers.
24. _________________________ It is earth-sun distance expressed in relative terms.
25. _______________ The theoretical end product of only the most massive stars after they explode.
26. _________________________ A universe which started with a bang, but which possesses sufficient mass to collapse upon itself at some future time, perhaps only to explode once again.
27. All matter-energy everywhere is a good definition for the _______________.