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Chapter 21
100 100 100 100 100
200 200200200200
300 300 300 300 300
400 400 400 400 400
500 500 500 500 500
Vocab Characteristics of a
Life of a
Systems & Galaxies
Random
Vocab – 100
All of the different types of electromagnetic waves is the
____________.
Electromagnetic spectrum
Vocab - 200
Galaxies that appear to have a buldge in the middle and arms that sprial outward are called _________.
Spiral Galaxies
Vocab - 300
What are constellations?
Imaginary pattern of stars
Vocab- 400
Astronomers use this to classify stars and to understand how stars
change over time.
H-R Diagram
Vocab- 500
This theory says that the universe formed in an instant, billions of years ago, in a
HUGE explosion.
Big Bang Theory
Characteristics - 100
What does the brightness of a star depend on? (hint: 2 factors)
Size and temperature
Characteristics - 200
parallax
How do astronomers measure the distances of nearby stars?
Characteristics - 300
What is the difference between apparent
brightness and absolute brightness?
DOUBLE JEOPARDY
Apparent: brightness seen from Earth Absolute: brightness if star is a standard distance
Characteristics- 400
What are the 5 characteristics to classify stars?
ColorTemperatureSizeCompositionbrightness
Characteristics - 500Using the H-R
Diagram, which star is hotter than the sun?
- Regulus or- Alpha
Centauri B
Alpha centari B
Life of a Star – 100
What factor tells how long a star will live?
Tell me about it.(think of Santa running….who could run longer,
you or Santa??)
Mass: the smaller the longer it lives or the bigger the shorter it lives
Life of a Star - 200
What is the first/earliest stage of a star? (hint: NOT nebula)
Protostar : after nuclear fusion takes place from a nebula
Life of a Star - 300
After a high mass star runs out of fuel it explodes suddenly….what
is this stage called?
Supernova
Life of a Star - 400Put the stages in order for a
low/medium star:
White dwarf
Red giant
Planetary nebula
Black dwarf
Protostar
Star
nebula1
2
3
4
5
7
6
Life of a Star - 500 Put the star stages in order for a HIGH mass star:
Neutron star
Super Red Giant
Nebula
Protostar
Black hole
Super nova
High mass star
DOUBLE JEOPARDY
1
2
3
4
5
7
6
Star Systems & Galaxies - 100
What is a star system?
Groups of two or more stars
Star Systems & Galaxies - 200
Star systems that have two stars are called double stars or ___________.
Binary Stars
Vocabulary - 300
When one star periodically blocks the light from another star it is called: __________ __________.
Eclipsing Binary
Vocabulary - 400
There are two types of star clusters: open and globular. Explain them.
Open clusters: loose, disorganized, only a few thousandGlobular: large groupings, older, millions of stars
Vocab - 500There are 3 different types of galaxies:
spiral, elliptical, and irregular.
Explain them.
Spiral: pinwheel shaped; bulge in middle; young stars, gas & dust Elliptical: round/flattened billions of stars; little gas and dust; old starsIrregular: smaller; bright young stars; lots of gas and dust to form new stars
Random - 100
What color is the “coolest” stars?
A. Red
B. Yellow
C. Blue
Random - 200
What is a light year and what is it used for?
the distance that light travels in a year; distances between stars
Random - 300
How does the gas and dust in a nebula become a protostar?
A star is born when the contracting gas and dust from a nebula become so dense and hot that nuclear fusion starts
Random - 400After a star runs out of fuel it becomes what 3 types of stars?
Word bank:
Supergiant
Planetary nebula
White dwarf
Black hole
Supernova
Neutron star
Random - 500
What galaxy is our solar system in (type and name)?
Milky Way - spiral