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Midterm Astronomy Review
-Groups of 3 or 4 (random).
-Send one person(top name) up for a board, marker, and eraser.
-Get to a table with your group, no study guides allowed!!!
What is the term for all of the leftover dust, debris, gas and
energy as a result of the big bang?
A: Background radiation
Objects that are completing what astronomers call a blue shift are
moving in what direction in relation to the viewer?
A: they are moving closer to the viewer
The Nebular Theory, which describes the formation of our
solar system is believed to have began __________ years ago.
A: 4.6-5 billion
Draw a picture of each of the 3 types of galaxies that exist in our universe. Include which of these 3 is the most
common type.
Elliptical (most common) Irregular – no shape Spiral (milky way) Barred
What characteristic of a star determines how long that star will
live? A: MASS
Large mass star = gas guzzler Small mass star = hybrid
A large mass star will either end up as a ______________ or a
______________
A: neutron star, black hole
Approximately how many stars are in our
UNIVERSE?
There are 100,000,000 (100 billion) in the Milky Way Galaxy alone!
ANSWER: Over 1,000,000,000 (Trillion)
As size increases, what happens to the overall temperature of a star?
A: temperature decreases because volume increases (heat is spread over a larger volume)
The color of the hottest stars in the universe is____________.
The color of the coolest stars in the universe is ____________.
A: Hottest = blue Coolest = red
How are all of the heavier elements, such as metals, created
in our universe?
A: They are created by the energy of an exploding star (SUPERNOVA)
What is the difference between revolution and rotation.
Answer:Revolution is the path around an object and Rotation is the spinning on an objects axis
The heliocentric model of our solar system was supported by the
discovery that __________ went through phases, just like our moon. This also disproved the geocentric
model.A: Venus, because it goes through phases we know it must revolve around the sun just like we do.
What 2 factors affect the force of gravity between 2 objects?
A: Mass and distance
*As mass increases, gravity increases.*As distance increases, gravity decreases.
List 2 of the 3 characteristics of stars that are represented on a
Hertzsprung-Russel Diagram
A: Temperature Color Brightness
What can be stated about the revolutionary period of planets that are further away from the
sun?
A: It takes LONGER to revolve around the sun the further away a planet is from the sun.
Define synchronous rotation of our moon.
Answer- The time it takes to rotate is equal to the time it takes to revolve
Which of the 4 major solar storms is a CONSTANT stream of high energy particles from the sun?
A: solar wind – a constant stream of high energy particles that is shot from the sun’s corona.
The collisions between solar wind and the Earth’s atmosphere cause
beautiful light shows and the north and south poles called __________
A: auroras
Which 2 types of solar storms have the ability to knock out satellites and communication grids on Earth?
A: Solar wind and solar flares
What is the formula for eccentricity?A: distance between foci/length of major axis.
Distance between foci
Length of major axis