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Chapter 2-2: Rates of Weathering Differential Weathering 1. 2. 3. Different types of rocks weather at different rates. Some weather quickly, some weather slowly. The rate at which a rock weathers depens on many factors Hard rock such as __________________weathers _____________ than softer rocks such as ____________________ Granit is made of minerals that are generally harder and more chemically stable than the minerals in limestone. Differential weathering : Is a processs by which softer, less weather-resistant rocks wear away, leaving harder, more weather-resistant rocks behind. Devils Tower is a landform known as a volcanic neck. This landform represents diffeential weathering. The Shape of Weathering Weathering takes place on the outside surface of a rock. The more surface area that is exposed to weathering the faster the rock will be worn down. A large rock has ____________ surface area. It also has a large _______________ because of this it will take a long time for a large rock to wear down. If a big rock is broken into ________________ rocks, weathering occurs much more quickly. This is because a smaller rock has more _______________ area relative to its _____________. Name ____________________________________ #_______ date _____________ Weathering and Climate Rust and oxidation occurs more quickly in a __________________ and _________________ climate. ** Chemical weathering occurs more rapidly in climates that are warm and humid.. Weathering and Elevation When newly formed mountain range extends up into the atmosphere it tends to be weathered back down again. Weathering occurs in the same way on a mountain as it does everywhere else. Rocks at a higher elevation are exposed to more wind, rain, and ice than rocks at a lower elevation. Gravity also plays a roll in weathering ~ The steepness of mountain slopes strengthens the effects of mechanical and chemical weathering. Rainwater quickly runs off the sides of mountains carrying _________________ with it. This continual _________________ of sediments exposes fresh rock surfaces to the effects of _________________. The _____________ the surface area is, the ___________ weathering occurs.
