Chapter 28 Vocab Assignment
Define the following terms according to your vocab notebook requirements. Some of these terms may not be BOLD or in the glossary, but can be found in the reading (Chapter 28).
Read Chapter 28 and as you read, answer the following questions in your vocab notebook according to the assignment requirements. Please note that we will not be following the textbook order for this chapter!
In 28.4: Complete these questions for class on 12/1/14.
1. What is the difference between the universe and the observable universe?
2. How old do astronomers estimate the universe to be?
3. Describe how the big bang model suggests the universe originated. Be sure to include how temperature and density changes through the process…carefully read the section “A Model of the Beginning.”
4. Describe the two pieces of evidence that supports the big bang model.
5. Into what basic shapes can most normal galaxies be classified?
6. How do active galaxies differ from normal galaxies?
7. Observations of very distant galaxies show that they are at an earlier stage of development than nearby galaxies. How do these observations support the big bang model?
In 28.1 and 28.2: Complete these questions for class on 12/3/14.
1. What do radio waves, visible light, and gamma rays all have in common?
2. What does a spectroscope do?
3. How do scientists use different spectra to figure out the composition of a star’s outer layer?
4. Why is the light reaching us from some celestial objects shifted toward the red or blue end of the spectrum?
5. Every star has a unique spectrum. What does this suggest about stars?
6. How do constellations differ from other groupings of stars, such as galaxies?
7. What is a lightyear? A parsec?
8. What is the connection between a star’s surface temperature and its color?
In 28.3: Complete these questions for class on 12/11/14.
1. What does the Hertzsprung-Russell diagram depict?
2. What forces balance each other in a main-sequence star?
3. How are stars “born”?
4. Describe the end of a massive star’s life.
5. How is the end of a massive star’s life different from the end of a star like our sun’s life?
6. If the gravitational force of black holes is so strong that light cannot escape, how do astronomers identify them?
THIS ASSIGNMENT IS DUE ON DECEMBER 15TH!