Exam (elaborations)
ASTRO 1 FINAL EXAM PSU 2024 QUESTIONS AND ANSWERS
- Course
- Institution
ASTRO 1 FINAL EXAM PSU 2024 QUESTIONS AND ANSWERS
[Show more]
Content preview
ASTRO 1 FINAL EXAM PSUWhat is the fastest speed in the universe? - ANSWERS-speed of light
Typical composition of stars - ANSWERS-74% H, 25% He, 1% Metals
How old is the Sun/solar system? How much longer will it live? - ANSWERS-4.5
billion, live to 10 billion
What is a star? - ANSWERS-glowing ball of hot dense gas that generates its own
energy via nuclear fusion
What is a light year? - ANSWERS-distance that light travels in 1 year
What is the closest star to Earth besides the Sun? (4.2 ly away) - ANSWERS-
proxima centauri
What is the age of the universe? - ANSWERS-14 billion years
What is our cosmic address? What is the Local Group? - ANSWERS-Earth, solar
system, milky way galaxy, local group, local supercluster
,Order of planets in our solar system - ANSWERS-Mercury, venus, earth, mars,
jupiter, saturn, uranus, neptune
What is the reason that we have seasons on Earth? - ANSWERS-tilt of the earth's
axis determines what hemisphere leans towards the sun
If Earth's orbit were a perfect circle, how would this affect seasons? - ANSWERS-
Would not because earth's orbit is already very close to a perfect circle
moon phases in order - ANSWERS-new moon, waxing crescent, first quarter
moon, waxing gibbous, full moon, waning gibbous, third quarter moon, waning
crescent
How long does it take to complete all the phases? - ANSWERS-29.5 days
What are the two types of eclipses (only solar and lunar) and what phase does the
Moon need
to be in for each one of the eclipses to occur? - ANSWERS-lunar: earth blocks
sunlight from moon, full moon
solar: moon passing directly in front of sun, new moon
If you see that the Moon is full, what phase will someone in Australia see? What
about
someone on the Moon looking at Earth? - ANSWERS-the same phase, the moon
will just look upside down
, people on the moon wouldn't see earth (new earth)
Kepler's laws - ANSWERS-1.) a^3=p^2(M1+M2)
2.) when planet is closer to sun, it moves faster in its orbit
3.) planets further from sun orbit slower
How can you tell a color of a star based on its blackbody curve? - ANSWERS-peak
of curve in visible spectrum
order of different types of electromagnetic radiation by wavelength - ANSWERS-
gamma, x ray, uv, visible, infrared, microwave, radio
What needs to happen inside an atom to produce an absorption or an emission
line? - ANSWERS--emission: excited state (electron is in an energy level above the
lowest possible one)
-absorption: moving to a higher energy level (photon of just the right energy is
absorbed by the atom)
What are the 3 types of spectra and how is each produced - ANSWERS-1.)
continuous: hot, dense energy source
2.) emission: hot, low density gas cloud - bright lines on black background
3.) absorption: hot dense energy source with cooler low density cloud of gas
(stars)-black lines on rainbow background
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Teacher101. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $12.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
75323 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now
