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!!