Catalysts
In Catalyst section of Science Journal:
Write at least 2 paragraphs about the midterm How well did you expect to do? How well did you actually do? (If you checked the
grade) What areas were easy? What areas confused you? How did you study? How do you plan to improve your grade for the next
exam?
Agenda
Catalyst Announcements Opening Pair Work: Chapter 7 Study Guides Mini-Lesson: Weathering and Erosion Group Work: Idea Mapping Closing Exit Ticket
Deadlines/Important Dates
Friday, November 16th
Science Project Part 4
Monday, November 19th
Chapter 7 Study Guide ALL in your own words
Monday, November 19th
Chapter 7 Quiz
Chapter 7 Study Guides
With table partner Focus on working on
“Analogies/Examples”
Weathering & Erosion
Objective
By the end of class, CWBAT define the vocabulary for Sections 7.1 & 7.2 and use those terms to create a concept map.
CCSS Literacy: 4. Determine the meaning of symbols, key terms, and other domain-specific words and phrases as they are used in a specific scientific or technical context relevant to grades 11–12 texts and topics.
Weathering
Process by which rocks on or near Earth’s surface break down and change
Erosion Removal and
transport of weathered material from one location to another
Mechanical Weathering
Process by which rocks and minerals break down into smaller pieces Only changes size
and shape NOT composition
Influences on Mechanical Weathering
1. Temperature Frost Wedging▪ Repeated
freezing/thawing of water in cracks of rocks
▪ Expansion during freezing causes cracks to expand
▪ Ice takes up 9% more space than liquid water
Influences on Mechanical Weathering
2. Pressure Joints (long,
curved cracks) form when upper layers of rock are removed from bedrock
▪ Bedrock expands Exfoliation▪ When outer rock
layers are stripped away
▪ Like peeling an onion
Chemical Weathering
Process by which rocks and minerals undergo changes in their composition as the result of chemical reactions
Affected by mineral/rock type, temperature, water, oxygen, acid precipitation
Chemical Weathering: Water Hydrolysis
The reaction of water with other substances
Occurs in the decomposition of silicate minerals
Chemical Weathering: Oxygen Oxidation
Chemical reaction of oxygen with other substances
Example: rust on an iron chain
Affects iron containing minerals like magnetite, biotite, pyrite
Chemical Weathering: Carbon Dioxide
When carbon dioxide from respiration combines with water, it creates weak carbonic acid Can dissolve calcite
in marble and limestone along with other minerals
Chemical Weathering: Acid Precipitation
Caused by the oxidation of sulfur dioxide and nitrogen oxides which are released into the atmosphere by human activities
Group Work
In groups of 2-3, create a concept map of the vocabulary for Sections 7.1 and 7.2 See page 177
When you finish, complete the Section Assessment on page 166 (#1-5)
Turn both in (INBOX!)
Closing
By the end of class, CWBAT define the vocabulary for Sections 7.1 & 7.2 and use those terms to create a concept map.
Exit Ticket
In Exit Ticket section of Science Journals:
How are humans affected by weathering/erosion?
How do humans affect weathering/erosion?
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