Through a Fog Test Bank Answers Third Edition - Understanding Our Universe 3e Complete Test Bank by Stacy Palen. DOCX document preview.
Mission 19: Through a Fog
MULTIPLE CHOICE
1. If the universe is roughly 3 K today, what was its temperature when it was 1000 thousand times smaller than it is today?
a. 0.003 K d. 300 K
b. 0.03 e. 3000 K
c. 30 K
2. Use Wien’s Law to estimate the peak wavelength of the blackbody emission from the present-day universe, which has a temperature of 2.7 K.
a. 0.11 millimeters d. 11 centimeters
b. 1.1 millimeters e. 1.1 meters
c. 1.1 centimeters
3. Which of the following particles is not a stable part of the early universe prior to the formation of the cosmic microwave background, but after nucleosynthesis?
a. Protons d. Lithium nuclei
b. Electrons e. Neutral hydrogen
c. Helium nuclei
4. Which of the following is a correct statement about the evolution of the universe?
a. The universe heats up as it expands.
b. The density of the universe remains constant in spite of its expansion
c. The eventual formation of stars heated up the entire universe.
d. The universe cools and become less dense as it expands.
e. None of the above.
5. The slightest temperature differences observed in the cosmic microwave background radiation as described by CORI are directly related to which of the following:
a. The formation of large-scale structure. c. The formation of planetary systems.
b. The formation of stars. d. The formation of individual galaxies.
1. Why does the early universe that the spaceship is flying through appear red?
2. If the early universe is only composed of protons, electrons, and helium nuclei, where do the rest of the elements on the periodic table originate?
3. Describe the process by which the cosmic microwave background radiation forms.