Astronomy Unit Review 1. Read the question 2. Write your answer on the white board 3. Write ONLY the...

Astronomy Unit Review

1. Read the question

2. Write your answer on the white board

3. Write ONLY the answer

Question #1

What happens to the color of light as a star moves toward you?

Answer:

It turns blue.

This is due to the Doppler Effect – as objects move toward you,the wavelength shortens and appears more blue.

Question #2:

What happens to the color of light as a start moves away from you?

Answer:

It turns red.This is again due to the

Doppler Effect – as objects move away from you,the wavelength lengthens and appears more red.

Question #3:

What happens to the wavelength of light as a star moves toward you?

Answer:

The wavelength gets shorter.

(and appears blue)

Question #4:

What happens to the wavelength of light as a star moves away from you?

Answer:

It gets longer.(and appears red)

Question #5:

What theory says that wavelengths change as objects come toward or away from you?

Answer:

The Doppler Effect

Question #6:

What is the theory that says the universe started as one mass and then exploded?

Answer:

The Big Bang Theory

Question #13:

What is a body of gases that gives off a tremendous amount of radiant energy in the form of light and energy?

Answer:

A Star

Question #14:

Which telescope made it a lot easier to study stars from Earth?

Answer:

The Hubble telescope

Question #15:

The spectrum of light emitted from stars tells the …..

Answer:

Elements present on that star

Question #16:

We measure distances in space in … (what unit?)

Answer:

Light years

Question #17

The longest stage in a star’s life is …..

Answer:

Main sequence

Question #18:

What is the name of a cloud of gas and dust?

Answer:

A nebula

Question #19:

What is the process that stars use to generate energy?

Answer:

Nuclear fusion

Question #20:

Which element do hydrogen atoms turn into during fusion?

Answer:

Helium

Question #21:

What is the name for the large, cool star?

Answer:

Red giant

Question #22:

What is the name for a small, hot star?

Answer:

White dwarf

Question #23:

What is the name for an explosion in space?

Answer:

Nova

Question #24:

When stars contract with a great force and collapse in on themselves, what is created?

Answer:

Black Hole

Question #25

What are small star patterns called?

Answer:

Constellations

Question #26:

What is a large group of stars called?

Answer:

A galaxy

Question #27:

What is the name of our galaxy?

Answer:

The Milky Way

Question #28:

What is the shape of our galaxy?

Answer:

Spiral

Question #29:

What are the two main elements in the sun?

Answer:

Hydrogen and Helium

(remember – the sun is just a star)

Question #30:

What is the outermost layer of the sun?

Answer:

Corona

Question #31:

What is the layer of the sun that we see?

Answer:

Photosphere

Question #31:

What are the cool places on the sun?

Answer:

Sunspots

Question #32:

What are arches of glowing gas that arch above the sun?

Answer:

Solar prominences

Question #33:

What are the most violent solar prominences called?

Answer:

Solar flares

Question #34:

What are the auroras called?

Answer:

Northern lights or Southern lights

This concludes today’s review activity.

Have fun studying!!