SES 4UI Ms. Roy
Astronomy Unit: Test Review
Unit Expectations:
· analyse the development of technologies that have contributed to our understanding of the universe, and evaluate the impact of milestones in astronomical theory or knowledge on the scientific community;
· investigate and analyse the properties of the universe, particularly the evolution and properties of stars, in both qualitative and quantitative terms;
· demonstrate an understanding of the origin and evolution of the universe, the principal characteristics of its components, and techniques used to study those components.
Major Topics of Review: (Text Reference Chapter 28)
1. Light and the electromagnetic spectrum
2. Unit of Measurements (Km, AU, Light Year, Parsec)
3. Stars: Evolution, Structure, H-R Diagram, Life And Death Of A Star
4. Galaxies: Types Of Galaxies (IRR, S, SB, E)
o Hubble Classification
5. Milky Way and Dark Matter (and contributions of space scientists)
6. Big Bang: What Does It Suggest And Evidence To Prove It
Key terms: geocentric, heliocentric, Main sequence, super giant, nebula, supernova, white dwarf, , black hole, Absolute and apparent magnitude, protostar, big bang, dark matter
Part 1: Multiple choice (sample questions)
1.) The milky way is characterized as:
a. Spiral b.) elliptical c.) irregular d.) unknown
2.) A globular cluster of stars:
a. Always appears on the main sequence
b. Must be studies to ensure that a supernova doesn’t happen close to earth
c. Is born of similar elements, and can contain millions of stars
d. Can not easily be plotted on the H-R diagram
3.) Our sun is a star that is characterized as:
a. White dwarf b. red giant c. yellow dwarf d. blue main sequence
4.) Scientists use spectroscopes when studying stars because:
a. We can’t study stars using visible light
b. It separates star light into colours therefore different wavelengths
c. Because some stars don’t appear on the spectrum
d. We can’t see them, but know they must be there
5.) Which unit would be best to measure the distance across the milky way galaxy?
a. Km b. parsec c. light years d. AU
Part 2: Application (H-R Diagram): Illustrate what an HR diagram may look like. Include labelling the x and Y axis with high and low Temp, and High and Low Luminosity. Add the spectral Classes.
□ use a line, or circle to indicate and label the following: Sun, Main sequence, White dwarf Stars, Red super Giants, blue giants Red Giants,
Part 3: Short Answer
1.) Describe the difference between absolute and apparent magnitude.
2.) What is at the centre of the Milky Way? How do we know?
3.) What evidence supports the concept of an expanding universe?
4.) Describe what hydrostatic equilibrium refers to when discuss stars and the H-R diagram.
5.) What will be the likely end result for a star like our sun?
Part4: Thinking
Do you think that in the future, we could change our theory about the origin of the universe? Why or why not?