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Thursday 1/9/14

Thursday 1/9/14. Objective : SWBAT explain the origins and layers of soil. SWBAT describe the effects of soil texture on permeability. Do Now : Complete Part 1 on your Soil Lab handout. *New seats today. Agenda : Bulletin Board! CFA Stats Layers of Soil Soil Lab Life’s Work:

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Thursday 1/9/14

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  1. Thursday 1/9/14 Objective: SWBAT explain the origins and layers of soil. SWBAT describe the effects of soil texture on permeability. Do Now: Complete Part 1 on your Soil Lab handout. *New seats today Agenda: • Bulletin Board! • CFA Stats • Layers of Soil • Soil Lab Life’s Work: Read ch. 12 (quiz Friday) Complete lab questions (due Monday) Week at a Glance:

  2. The NEW and Improved APES Bulletin Board! • Important Dates to Know: on calendar • FRQ Tips For You, By You: taken from exit tickets, Do Nows, etc. and posted anonymously • Monthly Trivia Questions: compete in teams of 4-6 to answer 5 APES trivia questions, posted each month. Trivia questions are due to Ms. Hart on the last Friday of the month. Teams with perfect scores will be entered into a raffle to win prizes. • AP Question of the Week:these AP style multiple choice questions will reappear on weekly reading quizzes. Answer them correctly for bonus points.

  3. How’d we do on CFA #2? Multiple Choice Section Hampton 44% Summit 57% Williams 42%

  4. How’d we do on CFA #2? Free Response Section Summit 41% Hampton 33%

  5. Comparing CFA 1 and CFA 2 56% 44% 35% 33% Multiple Choice Free Response CFA #2 CFA #1

  6. Other Stats about CFA #2 • 25% of students wrote in paragraph format instead of labeling answers (a), (b), etc. • Females outscored males on the free response (1.5 points), but males outscored females on the multiple choice (0.5 point)

  7. How does Soil Form?

  8. Soil Horizons ORGANIC LAYER (O-Horizon) • The uppermost layer; rich in organic material • Plant litter accumulates in the O-horizon and gradually decays • In deserts, O-horizon is completely absent • In Organically rich soils, O-horizon may be the dominant layer

  9. Soil Horizons TOPSOIL LAYER (A-Horizon) • Dark and rich in accumulated organic matter and humus • Granular texture • Somewhat nutrient-poor because nutrients are lost to deeper layers through a process called infiltration

  10. Soil Horizons SUBSOIL LAYER (B-Horizon) • Light-colored subsoil beneath the A horizon layer • Where nutrient minerals and topsoil accumulate after leaving the A horizon • Typically rich in iron, aluminum compounds, and clay

  11. Soil Horizons PARENT MATERIAL LAYER (C-Horizon) • Contains weathered pieces of rock • Often saturated with groundwater • Roots of most plants don’t go down this deep

  12. Exit Ticket (on a separate piece of paper) • Michael and Jeff can’t seem to agree. Michael argues that porosity and permeability are the same thing. Jeff is convinced that that they are different. • Who is correct? Explain your choice using detailed, complete sentences.

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