Earth & space science · Grades 5–9
Rocks, minerals and geological processes · Revision sheet
Read the rock cycle as possible pathways, not one compulsory loop.
Learn the idea
Rock
A rock is an aggregate of minerals or mineral-like material; a mineral has a defined natural composition and structure within its definition.
Processes
Cooling, compaction, cementation, heat, pressure and weathering can change geological materials.
Cycle
A rock-cycle diagram presents possible transformations, not a fixed travel schedule.
Time
Processes occur over different time scales; evidence determines an interpretation.
Explain without looking
- Why can a rock contain several different minerals?
- Why should a field observation be recorded before choosing a rock name?
Further reading and review references
These are reference links, not copied exercises, institutional endorsement or proof of independent review.
Independent educational review required. Grade bands are approximate; these are not officially aligned curricula.