Weathering CQ

Limestone chips dissolve after they are placed in a beaker of dilute acid.  Which geologic process is this most similar to?

• faulting
• folding
• weathering
• subduction

Which of the following is NOT a typical cause of mechanical weathering?

• plant roots
• bird nesting
• animal burrowing
• ice wedging

You are designing an experiment to test the resistance to weathering of various types of materials.  What weathering process could be modeled using sandpaper?

• acid rain
• freezing and thawing
• abrasion
• oxidation

Cracks and potholes in the road are caused mainly by

• oxidation
• acid rain
• ice wedging
• plant roots

Which is the best example of mechanical (physical) weathering?

• the cracking of rock caused by the freezing and thawing of water
• the reaction of limestone with acid rainwater
• the transportation of sediment in a stream
• the formation of a sandbar along the side of a stream

While hiking last year, Mike saw a large boulder next to a mountain trail. The boulder had no cracks. While hiking on the trail this year, he saw two large cracks in the boulder. Which of the following most likely caused these cracks to form? (this was a DO NOW question)

• shaking from high winds
• pressure from flowing water
• erosion due to falling rain and snow
• weathering due to freezing and thawing

Which of the following is a naturally occurring cause of chemical weathering?

• oxygen
• nitrogen
• ammonia
• peroxide

Which factor has the least effect on the weathering of a rock?

• composition of a rock
• exposure of the rock to the atmosphere
• the number of fossils found in the rock
• climatic conditions

The breakdown of rocks and minerals into smaller particles without a change in composition is called —

• igneous intrusion
• chemical precipitation
• mechanical weathering
• metamorphic foliation

The rate of chemical weathering is less in Antarctica than in the rain forests of Brazil because of

• the high amount of air moisture
• the low temperatures
• the heavy winds
• the greater amount of organic materials in the soil