Summary

This document is a review of geological topics, covering weathering, Earth's internal heat, magmatism, metamorphism, stress on rocks, seafloor spreading, geological time, and Earth history. It includes definitions and key concepts for each topic.

Full Transcript

**1. Weathering of Rocks** - Definition of weathering - Differences between chemical and mechanical weathering - Processes of weathering (physical fragmentation and chemical alteration) - Influence of temperature and climate on weathering rates **2. Earth's Internal Heat** - Main...

**1. Weathering of Rocks** - Definition of weathering - Differences between chemical and mechanical weathering - Processes of weathering (physical fragmentation and chemical alteration) - Influence of temperature and climate on weathering rates **2. Earth's Internal Heat** - Main sources of Earth\'s internal heat (gravitational contraction, radioactive decay, extraterrestrial impacts) - Definition and significance of Earth\'s internal heat - True statements about Earth's internal heat and its role in geological processes - The process of accretion and its contribution to internal heat **3. Magmatism** - Definition of magmatism - What happens to magma during a volcanic eruption - Factors determining whether magma reaches the Earth's surface (composition, tectonic boundaries, pressure, and temperature) **4. Metamorphism** - Processes leading to the formation of new minerals (e.g., neocrystallization) - Factors transforming sedimentary rocks into metamorphic rocks (pressure, temperature, volatiles) - Changes in rock texture during metamorphism - Effects of metamorphism on original minerals in rocks **5. Behavior of Rocks Under Stress** - Types of stress (shear, compressive, tensional) and their effects on rocks - True statements about rock behavior under compression - Effects of stress and pressure on rock minerals (collapse, deformation) - Processes of bending or flowing of rocks under stress **6. Seafloor Spreading** - Characteristics of the seafloor (age, composition, sediment accumulation) - Evidence supporting seafloor spreading - Explanation of seafloor spreading and its implications on Earth\'s size - Processes occurring at mid-ocean ridges and their role in ocean basin formation **7. Geological Time and Stratigraphy** - Definition of geological time scale - Importance of relative and absolute dating methods - Laws of stratigraphy (superposition, cross-cutting relationships, lateral continuity) - Use of index fossils in dating and identifying rock layers **8. History of Earth Through Geologic Time** - Significant geological periods and their characteristics (Cambrian explosion, age of invertebrates) - Importance of subdivisions of geologic time in understanding Earth\'s history - Key events that occurred in different geological periods (Carboniferous, Permian extinctions)

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