Examples of Moon Surface Features: Explore Real Craters and Maria

📚 Quick Study Guide

• 🌑 Craters: Formed by impacts from asteroids and meteoroids. They can range in size from tiny to hundreds of kilometers in diameter.
• 🌊 Maria (Singular: Mare): Large, dark, basaltic plains formed by ancient volcanic eruptions. They are smoother and less reflective than the highlands.
• ⛰️ Highlands: The heavily cratered, mountainous regions of the Moon, composed mainly of anorthosite.
• 🌋 Rilles: Long, narrow depressions on the lunar surface, often associated with lava flows. They can be sinuous or linear.
• 🌠 Ejecta: Material ejected from the lunar surface during impact events, often forming rays around craters.
• 🌡️ Regolith: The layer of loose, unconsolidated material covering the lunar surface, composed of dust, soil, broken rock, and impact debris.

Practice Quiz

1. What are maria on the Moon primarily composed of?
   1. A. Anorthosite
   2. B. Basalt
   3. C. Granite
   4. D. Sandstone


2. Which of the following is the main cause of craters on the Moon?
   1. A. Volcanic activity
   2. B. Tectonic plate movement
   3. C. Impacts from asteroids and meteoroids
   4. D. Wind erosion


3. What is the term for the loose, unconsolidated material covering the lunar surface?
   1. A. Mantle
   2. B. Core
   3. C. Regolith
   4. D. Crust


4. What are rilles on the Moon?
   1. A. Mountain ranges
   2. B. Large impact craters
   3. C. Long, narrow depressions
   4. D. Dark, basaltic plains


5. Which type of lunar terrain is heavily cratered and mountainous?
   1. A. Maria
   2. B. Highlands
   3. C. Rilles
   4. D. Regolith


6. What is ejecta?
   1. A. Volcanic gas
   2. B. Material ejected during impact events
   3. C. Lunar lava
   4. D. Fine lunar dust


7. What is the primary composition of the lunar highlands?
   1. A. Basalt
   2. B. Anorthosite
   3. C. Granite
   4. D. Obsidian