Chapter 21

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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