Weathering The wear and tear of rock exposed at Earth’s surface.

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Presentation transcript:

Weathering The wear and tear of rock exposed at Earth’s surface

Types Physical- rock is broken into smaller pieces (sledgehammer smashing rock) Chemical-Rock is actually changed in form (limestone dissolving in water.)

Agents of Physical Weathering H2O (Frost Wedging) Plant roots Pressure unloading Abrasion Wetting and drying

Agents of Chemical Weathering H20 (hydration) C02 (carbonation) O2 (oxidation)

Climate WATER (humidity is ESSENTIAL!!) “Wetter is Better!” COLD, humid climates favor physical weathering WARM, humid climates favor chemical weathering

Frost Wedging (Physical)

Chemical Weathering

Factors Affecting The Rate of Weathering Composition (Some rocks are tougher, or more resistant, than other rocks) Shape (angularity helps-irregular edges break off) Size (smaller particles weather faster) ****Climate (humidity)

Today

Animations Formation of a cave (chemical) Formation of an arch physical)

Delicate Arch

Hoodoos

Thor’s Hammer

The Indian Princess

The Three Wise Men

The Wave