DOL 8.9B Galaxies 11/14/24

Which of the following is a characteristic of spiral galaxies?

• They have a smooth, featureless appearance.

• They contain a central bulge and spiral arms.

• They are irregular in shape and lack a defined structure.

• They are composed mostly of older stars with little gas or dust.

Explain how elliptical galaxies differ from spiral galaxies in terms of their star formation activity.

• Elliptical galaxies have high star formation rates due to abundant gas.

• Elliptical galaxies have low star formation rates because they lack gas and dust.

• Spiral galaxies have low star formation rates due to their dense cores.

• Spiral galaxies have no star formation activity at all.

Identify the main components of a galaxy.

• Stars, planets, and comets.

• Stars, gas, dust, and dark matter.

• Planets, asteroids, and meteoroids.

• Black holes, quasars, and pulsars.

Match the pictures to the names for each galaxy

• Spiral Galaxy

• 
• Irregular Galaxy

• 
• Barred-Spiral Galaxy

• 
• Elliptical Galaxy

• 

Tags

NGSS.MS-ESS1-2

The Milky Way is a barred spiral galaxy. What are some characteristics of this type of galaxy? Check all that apply?

• It has a bulge in the middle and arms that spiral outward.

• It appears to look like a stretched-out circle and lacks swirling arms.

• It lacks a regular shape and is small. It contains a lot of gas and dust and is

  the home to many stars.

• It contains many old stars and has little gas and dust.

• Its arms contain gas and dust and are home to many stars.

A research team is studying a galaxy with the following characteristics: it has a very faint, elongated shape with no visible spiral arms or star-forming regions. Based on these characteristics, which galaxy type is this most likely to be​?​ ​ (a)  

• Elliptical
• Spiral 
• Irregular
• Barred Spiral

After analyzing several galaxies, a student categorizes them as spiral, elliptical,

or irregular. Which of the following galaxy characteristics would most likely lead

to a classification as an irregular galaxy?

• Presence of a defined, central bulge with organized arms

• A disk shape with a distinct central bar and visible arms

• A smooth, uniform, elongated shape with no visible star-forming regionsi

• A loose collection of stars without a regular shape or central structure