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L.O: SWBAT EXPLAIN HOW PARTICLES SETTLE in STILL WATER .
Do now sheet
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WHAT DO YOU NOTICE?
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Settling: when sediment particles sink
(are deposited) in still water because of gravity. What is happening to these particles in water? The particles are settling
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Explain these 3 images. WHY do they look this way?
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If placed in still water, which sediment particle would settle first
If placed in still water, which sediment particle would settle first? Which would settle last? Why?
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3 factors affect settling rate:
3 factors affect how fast sediment sinks when in water Particle size particle shape particle density
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Which size particle will settle fastest in water? Slowest? Why?
If they are made of the same uniform material, Large diameter particles settle faster , Small particles settle slower 1.Particle size: As particle size increases, settling time decreases. Which size particle will settle fastest in water? Slowest? Why? boulder cobble pebble sand silt
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WHY?
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WHY?
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Vertical sorting: if made of the same density material, in still water, the largest particles settle first. The smallest settle last. Small sized sediment Medium sized sediment Largest sediment
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WHY?
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Sometimes vertical sorting by PARTICLE SIZE can happen over and over as new sediment is deposited
WHY?
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2.Particle shape: Round & smooth particle
These particles are made of the same substance. Which will shape settle fastest? Slowest? Why? Round & smooth particle Flat, angular & rough particle
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As particle shape becomes round, settling rate gets faster.
If they are made of the same uniform material, Round & smooth particles settle faster than flat, angular & irregular shaped particles. Settles slowest Settles fastest
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WHY?
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WHY?
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Which density particle will settle fastest in water? Slowest? Why?
If they are the same size & shape, high density particles settle faster than lower density particles. 3.Particle density: Which density particle will settle fastest in water? Slowest? Why? 3.2 g/cm3 7.6 g/cm3 5.8 g/cm3
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As density increases settling time decreases.
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WHY?
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The largest, roundest, & densest particles settle first.
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Independent work: complete regents questions 1-10
Homework: complete regents questions 11-18
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L.O: STUDENTS WILL COMPLETE THEIR DEPOSITION LAB
PARTICLE diameters (SIZES): 3.O mm (millimeters) 4.0 mm 5.0 mm Densities: Glass beads: 2.47 g/cm3 Steel beads: 8.05 g/cm3
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