Characteristics of Irregular Galaxies
Irregular galaxies can be divided into two main subtypes:
- Irregular I (Irr I): These galaxies have some structure and may contain small amounts of gas and dust, along with young stars.
- Irregular II (Irr II): These galaxies are more chaotic in appearance and lack the structure and organized spiral arms found in spiral galaxies.
Study Guide for Irregular Galaxies
When studying irregular galaxies, it's important to focus on the following key points:
- Structure: Describe the irregular shape and lack of organized structure in irregular galaxies.
- Size and Scale: Compare the size of irregular galaxies to other types of galaxies, and discuss the range of sizes observed.
- Star Formation: Explain the high levels of star formation observed in irregular galaxies and discuss the presence of young, hot stars.
- Observations: Discuss the methods used to observe and study irregular galaxies, such as telescopes and space-based observatories.
- Examples: Identify and describe specific examples of irregular galaxies, such as the Large Magellanic Cloud and the Small Magellanic Cloud.
◂Science Worksheets and Study Guides Sixth Grade. Solids, liquids and gases
Study Guide
Solids, liquids and gases 
Activity Lesson
Solids, Liquids & Gases Worksheet/Answer key
Solids, liquids and gases Worksheet/Answer key
Solids, liquids and gases Worksheet/Answer key
Solids, liquids and gases Vocabulary/Answer key
Solids, liquids and gases Vocabulary/Answer key
Solids, liquids and gases
Activity LessonWorksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyVocabulary/Answer keyVocabulary/Answer keyThe resources above cover the following skills:
PHYSICAL SCIENCE
Energy
Students who demonstrate understanding can:
Plan an investigation to determine the relationships among the energy transferred, the type of matter, the mass, and the change in the average kinetic energy of the particles as measured by the temperature of the sample.