Earth is made up of rocks, and it’s fascinating to study geology to learn more about Earth’s composition. Rocks come in all shapes and sizes, and they fall under three main categories, which are igneous, sedimentary, and metamorphic. The way rocks are formed will determine their category. Anyone can learn about rocks, and rock collecting is a fun hobby that’s directly connected to the study of rocks.
Rock creation is a product of the rock cycle, which is a cycle that involves the breaking down and formation of rocks. The rock cycle can happen deep below Earth’s surface or on the surface, depending on the type of rock. The three types of rocks form differently in the rock cycle. Igneous rocks melt and cool, sedimentary rocks are deposited from water or air and compacted together, and metamorphic rocks form by heat or pressure to create a new and different rock. Rocks are always changing and redistributing as a part of the never-ending rock cycle.
- The Rock Cycle
- Overview of the Rock Cycle
- What Is the Rock Cycle?
- Lecture: The Rock Cycle
- Rocks and the Rock Cycle
- Rock Cycle: Processes of Rock Formation and Erosion
- The Rock Cycle
All rocks are a solid mixture of grains of one or more minerals. Minerals are naturally occurring elements or compounds that have internal crystalline structures. Magma, found deep in Earth’s mantle, is the foundation and source of all rocks and directly makes igneous rocks. Igneous rocks form by crystallization when hot magma cools. Sedimentary rocks form when bits of rock that have been weathered or eroded away are compacted together to create a new rock. Metamorphic rocks form from a combination of heat and pressure, which changes the original rock into a new type of rock. The original metamorphic rock might have been sedimentary, igneous, or a different type of metamorphic rock. Rock classification depends on the texture and composition of rocks. Texture pertains to the size and shape of the mineral grains. Composition involves the types of minerals and the proportions of present minerals, which is called mineralogy.
- How Rocks Form: Igneous Rocks
- Metamorphic Rocks Lesson
- Classification of Common Rocks: Igneous, Sedimentary, and Metamorphic
- The Basics of Rocks and Minerals and Polar Geology
- Sedimentary Rocks
- Three Types of Rock: Igneous, Sedimentary, and Metamorphic
- An Introduction to Rock Types
- Rock Types
- Rock Classification
Pebbling Puzzles, Quizzes, and Other Activities
Quizzes, games, puzzles, and lesson plans are great tools to help you learn about rocks, either at home or in the classroom. You can tackle these activities in your spare time and progress at your own pace. Lesson plans can be applicable to a single child or adult learner or small or large groups. Look for activities that don’t require a lot of materials. Many games, puzzles, and lesson plans are simple enough to do with what you already have around the house.
- Rocks and Minerals Word Search
- Rocks and Minerals: Super-Hard Word Search
- Three Types of Rocks: Teacher-Created Lesson Plan
- Rock Walk Lesson Plan
- Geology: Earth and Rocks Quiz
- Rocks and Minerals Quiz Whiz
- Criss-Cross Geology Puzzle
- Can You Guess These Gemstones From Just One Image?
- Rocks and Minerals: Scratch Test
- Identify the Igneous Rock Collection Quiz
- How Are Rocks the Same, and How Are They Different?
Starting a rock collection is a great way to learn more about rocks and geology. You will need some basic tools to help you begin gathering rocks, but the tools aren’t excessively expensive. Buy a short-handled shovel, a rock hammer, a mallet and chisel, a bucket, work gloves, and safety glasses before you begin hunting for and gathering rocks. You’ll need to decide whether you want a general rock collection or a collection that focuses on a specific type of rock. Many rock collectors like to collect rocks that are local to their geographic region, and others like to find unusual rocks from other places. Quarries and ditches are good places to find rocks, but use caution when hunting for rocks in these areas. Stream beds are another good place to find unusual rocks. Before you hunt for rocks in a location, make sure you have permission to be there looking for rocks.
- Rock and Mineral Collecting for Beginners
- How to Start a Rock Collection
- How to Start a Rock Collection: A Guide for Newbie Rock Hounds
- Start a Rock Collection
- How to Start Rock Collecting: Complete Guide for Beginners
- Rock Collecting and Geology Basics: A Beginner’s Guide
- Collecting Rocks
- Rock Collecting for Beginners: Becoming an Amateur Geologist
- Beginner Guide to Rock Collecting
- How to Get Your Kids Into Rock Collecting and Geology
Rock Collecting Safety
Safety needs to be your first priority when you are collecting rocks. Just as you would always hike with a buddy and tell someone where you are going and when you’ll be back, you should do the same when you go out hunting for rocks. Bring along sufficient water, food, and first-aid supplies. Always bring the tools you’ll need, and wear eye protection when you’re actively digging for rocks. If you’re hunting for rocks in quarries or mines, never go underground to look for rocks. Finding a good place to hunt for rocks involves research. Join clubs and find out where other people in your area hunt for rocks. Never hunt for rocks on private land without permission. If you’re hunting on public land, check with the government agency that controls the land for rules about rock hunting.