Minerals : Minerals are naturally occurring substances that make up rocks and can be identified by their physical and chemical properties.
Rock Cycle : The rock cycle is the ongoing set of processes that changes rocks from one type to another over geological time.
Igneous, Sedimentary & Metamorphic Rocks : Igneous, sedimentary, and metamorphic rocks are the three major rock categories distinguished by how they form and transform.
📝 Essential Points
There are three main rock categories: Igneous, Sedimentary, and Metamorphic rocks.
The rock cycle links the three rock categories through processes that convert one type into another.
Minerals are the building blocks that make up rocks in the rock-cycle system.
📖 2. Earth structure and plate tectonics
🔑 Key Concepts & Definitions
Plate Tectonics : Plate tectonics is the idea that Earth’s outer shell is divided into moving plates that interact at their boundaries.
Divergent Boundaries : Divergent boundaries are plate boundaries where plates move away from each other.
Convergent Boundaries : Convergent boundaries are plate boundaries where plates move toward each other and interact.
📝 Essential Points
Transform boundaries are a third type of plate boundary distinct from divergent and convergent boundaries.
Subduction is a key process associated with convergent boundaries.
Continental vs Continental collisions and Oceanic vs Continental convergent boundaries are specific forms of convergence.
Earthquakes and volcanoes are connected with plate tectonics and boundary activity.
⚠️ Common Pitfalls & Confusions
Students may confuse minerals with rocks, since rocks are mixtures of minerals rather than a single substance.
Students may treat the rock cycle as a one-time event instead of continuous rock transformation.
Students may mix up rock categories and describe an igneous, sedimentary, and metamorphic rock as if they were interchangeable labels.
Students may confuse boundary types by assuming all plate interactions involve subduction, even when the source distinguishes divergent, transform, and convergent boundaries.
Students may ignore the special cases listed under convergent boundaries, such as continental vs continental and oceanic vs continental scenarios.
Students may link earthquakes and volcanoes to only one boundary type, even though the course ties them broadly to plate tectonics and boundary activity.
✅ Exam Checklist
Define minerals as the substances that compose rocks.
State what the rock cycle represents as an ongoing transformation system.
Name the three main rock categories: Igneous, Sedimentary, and Metamorphic rocks.
Identify Earth’s division into layers as a basic part of Earth structure.
Define plate tectonics as the motion and interaction of Earth’s plates.
Name the three plate-boundary types included: divergent, convergent, and transform.
Describe divergent boundaries as plates moving away from each other.
Describe convergent boundaries as plates moving toward each other.
Identify subduction as a process associated with convergent boundaries.
Distinguish continental vs continental collisions as a convergent scenario.
Distinguish oceanic vs continental convergent boundaries as a convergent scenario.
Connect earthquakes and volcanoes to plate tectonics and boundary activity.