Irregular Galaxies

An irregular galaxy is a type of galaxy that does not have a distinct regular shape, unlike spiral or elliptical galaxies. These galaxies are often chaotic in appearance, with no defined structure or symmetry. Irregular galaxies can be further classified into two subtypes: Irr I and Irr II.

Irr I Galaxies

Irr I galaxies are characterized by their relatively high levels of dust and gas, as well as ongoing star formation. They often exhibit a more organized structure compared to Irr II galaxies, with some regions showing hints of spiral arms or other features.

Irr II Galaxies

Irr II galaxies, on the other hand, are more chaotic in nature, lacking any distinct structure or symmetry. They typically have lower levels of dust and gas, with little ongoing star formation. These galaxies are often the result of gravitational interactions with other galaxies, leading to their irregular appearance.

Key Features of Irregular Galaxies

Unorganized and irregular shape
Varied levels of dust and gas
Ongoing star formation in Irr I galaxies
Lack of defined structure in Irr II galaxies
Result of gravitational interactions with other galaxies

Study Guide

What are the two subtypes of irregular galaxies?
Describe the characteristics of Irr I galaxies.
Explain the irregular nature of Irr II galaxies.
What are the key features of irregular galaxies?
How are irregular galaxies formed?

◂Physics Worksheets and Study Guides High School. Light and Optics

Vocabulary/Answer key

Light and Optics

Vocabulary/Answer key

Light and Optics

Vocabulary/Answer key

Light and Optics

The resources above cover the following skills:

Skills And Processes: The student will demonstrate ways of thinking and acting inherent in the practice of science. The student will use the language and instruments of science to collect, organize, interpret, calculate, and communicate information.

The student will pose scientific questions and suggest investigative approaches to provide answers to questions.

The student will test a working hypothesis. (NTB)

The student will use appropriate methods for communicating in writing and orally the processes and results of scientific investigation.

The student will describe similarities and differences when explaining concepts and/or principles.

The student will use mathematical processes.

The student will use ratio and proportion in appropriate situations to solve problems.

Concepts Of Earth/Space Science: The student will demonstrate the ability to use scientific skills and processes (Core Learning Goal 1) to explain the physical behavior of the environment, Earth, and the universe.

The student will identify and describe techniques used to investigate the universe and Earth.

The student will describe the purpose and advantage of current tools, delivery systems and techniques used to study the universe.

Concepts Of Physics: The student will demonstrate the ability to use scientific skills and processes (Core Learning Goal 1) to explain and predict the outcome of certain interactions which occur between matter and energy.

The student will investigate certain topics in modern physics.

The student will cite evidence of the wave/particle duality in the nature of matter.