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All About the Sun
Facts about the sun's temperature, layers, composition, and more.
19
Astronomy
11th Grade
11/07/2010

Additional Astronomy Flashcards

 


 

Cards

Term
There is/are ____ star(s) in our solar system.
Definition
One (the Sun)
Term
_______ is the closest planet to our Sun.
Definition
Mercury
Term

An astronomical unit (AU) is

_______ miles.

Definition
93 million
Term
The sun has nearly __% of the solar system's mass.
Definition
99
Term
The sun is composed mostly of these two gases.
Definition
Hydrogen and Helium
Term

The  Greek word "

_______" means "sun."

Definition
helios
Term
This is the part of the sun that we can see.
Definition
photosphere
Term

Electrically charged particles that stream in all directions from the sun are called

_______.

Definition
solar winds
Term
The sun's surface temperature is approximately ____ degrees Kelvin.
Definition
5800
Term
_______s are caused by solar winds.
Definition
Aurora
Term
These are the two atmospheres that can be seen during a total eclipse.
Definition
The corona and the chromosphere.
Term

It takes light

_______ to reach Earth from the sun.

Definition
8 minutes
Term

In thermonuclear fusion,

_______ combines with

_______.

Definition
Hydrogen & Helium
Term
The _______ _____ is the layer of the sun that trapped photons that move around in a random motion.
Definition
radiative zone
Term
_______ are relatively cool places on the sun's surface.
Definition
Sunspots
Term
Arrange the following in order of density from least to greatest: sun, Earth, moon
Definition
sun, moon, Earth (REMEMBER: the sun is mostly made of gases)
Term
The sun's core is ___-___ degrees Kelvin.
Definition
10 million - 15 million
Term
Which rotates more quickly: the equator region or the polar region of the sun? How long does each take to rotate?
Definition
The equator region takes 25 days to rotate, while the polar region takes 29 days.
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