Galaxies

Presentation

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Science

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9th - 12th Grade

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Practice Problem

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Easy

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NGSS

MS-ESS1-2, HS-ESS1-2, MS-PS2-4

Standards-aligned

Tom Kramer

Used 85+ times

FREE Resource

11 Slides • 7 Questions

Galaxies

What is a Galaxy?

A huge collection of:

- Gas

- Space Dust

- Millions to trillions of stars and any planets surrounding them

- "Rogue Planets"

Galactic Info

Galaxies spin, similar to the objects in our solar system
We don't know how many there are.
Current estimates are at more than 2 trillion

Multiple Choice

Galaxies spin, similar to how our solar system spins.

True

False

Open Ended

What are galaxies made up of?

Type response here

3 Main Types (based on shape)

- Spiral

- Elliptical

- Irregular

Spiral Galaxies

Called this because they appear to form a spiral shape
Stars are still forming in these types of galaxies
One of the more common types of galaxies

Elliptical Galaxies

Seem to be older
Stars formation is no longer occuring
Lack dust and gas
Might be the result of galaxies colliding

Irregular

Usually smaller
Believed to form for 2 reasons - too small to form into a structure, or a massive collision caused them to lose their structure

Galaxies in Transition

Kind of a 4th category for Galaxies
Weirdly shaped, but with a clear structure
Normally the result of galaxies colliding

Multiple Choice

Galaxies can collide with each other

True

False

Multiple Choice

This type of galaxy is generally considered to be older and is no longer forming stars.

Spiral

Irregular

Elliptical

Transition Galaxies

Multiple Choice

One of the more common types of galaxies which have stars still forming within them are...

Elliptical

Spiral

Irregular

Transition

Milky Way Galaxy

The Galaxy we are within
Spiral Galaxy
About 100,000 light years wide

Dark Matter - a Brief Intro

- Something is strange about the spin of many galaxies, going against the laws of Kepler.

- Based on this, it was proposed that a large % of matter within galaxies, including our own, is invisible.

- This matter helps hold galaxies together and effects the movement objects within the galaxy

Multiple Choice

What type of galaxy is the Milky Way?

Spiral

Elliptical

Irregular

Transition

Open Ended

Briefly summarize how we know dark matter exists.

Type response here

Galaxies

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