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Weathering and Erosion

Investigation 1 – PostLab

 

 

 

 

 

 

 

ANALYZE IT

Complete the Analysis Questions in your SDR and be prepared to discuss them as a class.

Discuss the following questions after Trial 1 in the Student Data Record.

  • Describe the physical properties of the marble chips.
  • Did you successfully physically weather the marble chips? Were you able to reduce them to smaller pieces?
  • Why did you have difficulty reducing the chips to smaller pieces? 
  • How long would it take to naturally physically weather the marble chips and reduce them to smaller pieces? 

Discuss the questions after Trial 2 in the Student Data Record.

  • Is a chemical reaction taking place between the hydrochloric acid and the marble chips?
  • What observations suggest that a chemical reaction is taking place? 
  • What observation suggests that not all the marble is reacting with the acid? 
  • Do the marble chips consist only of calcium carbonate? Why? 

Discuss the questions after Trial 3 in the Student Data Record.

  • Is a chemical reaction taking place between the hydrochloric acid and the calcium carbonate powder?
  • What observations suggest that a chemical reaction is taking place? 
  • Which reaction produced carbon dioxide gas more rapidly? 
  • Which reaction contained the smaller pieces of solid reactant, the reaction of the marble chips, or the calcium carbonate powder?
  • What is the relationship between the size of the particles and how fast chemical weathering takes place? Why?

 

GET FOCUSED

Complete the Focus Questions in your SDR then discuss them as a class. 

  • How are physical and chemical weathering different? 
  • How do physical and chemical weathering combine to weather rocks?