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Monday, November 23rd
Entry Task Answer the following question using full sentences, IQIA.1.Why is fertile land often found on flat land around rivers?2.Why do caverns form in areas with limestone?3.What do you call curves and bends in a stream channel?
Schedule:5.2 notes
Homework:5.2 Questions
Objective: I can identify the different land features made by moving water.
Please have on desk:5.2 RSG
Moving Water Shapes Land
Streams Shape Earth’s Surface
• The land is always higher than the water.
• Water always runs downhill– This shapes the land
by erosion and deposition
Drainage Basins and Divides
• Drainage basin- area of land in which water drains into a stream system
• Divide-ridge from which water drains to one side or the other Drainage basin
Divide
Streams
• Stream is any body of water that flows down a slope along a channel.
• Streams form from melting snow/ice or rainwater fall
Streams form
Streams
Valleys
• Valleys are formed as streams flow and carry sediment from the surface of the land.
• This occurs in high areas and create V-shaped, straight, and narrow valleys
Valley
Valleys
Floodplain
• Area of land on either side of a stream that is underwater when the stream floods.
• When streams flood a lot of the sediment carried by the stream is deposited in the floodplain.
• They are very fertile
Floodplain
Floodplains
Stream Channels
• As land flattens, streams and rivers widen and take curvier paths
• Meanders-curves and bends that form a twisting, looping pattern in a stream channel– Moving water erodes the outside bank and deposits
sediment inside the banks– May shift position over many years
• Oxbow lakes- may form during floods where the stream may cut a new channel to bypass a meander.
MeandersMeanders
Oxbow Oxbow lakelake
Stream Channel
Meanders Oxbow Lakes
Delta
• Area of land formed by the buildup of sediment at the end (mouth) of a river
• When a river enters an ocean, the water slows down and the river drops much of its sediment
• This sediment gradually builds up to form a plain (can be fan shaped and extremely large)
DeltaDelta
Deltas
Alluvial Fans
• A fan-shaped deposit of
sediment at the base of
a mountain
• Forms when streams
leave steep valleys and enter flatter plains
• Fan is created when a stream slows down at the base and drops some of it’s sediment at the base of the slope
Water Moving Underground
• Water can soak into the ground and become groundwater
• Beneath the soil space can become completely filled with water.– Top of this area is the water table– Below water table is groundwater
• Water table is different according to time and location-can change
Watertable
Caverns• Erosion takes place with this moving
underground water.• Acidic rainwater can dissolve and carry away
rocks that contain limestone.• Over time, open spaces are produced-
CAVES!– Large caves are called caverns
• Sink holes are formed when the roof of a cave is too thin to support the weight on the surface
Caverns and Caves
Sinkholes
Sinkholes
Sinkhole
Sinkhole
Tuesday, November 24th Entry Task1.Draw a map of a river. 2.Label the river with an arrow to show its direction of flow.3.Add three small streams that join the river. 4.Label each stream with an arrow to show it’s direction of flow.5.What is the difference between a drainage basin and a divide?6.How do streams change as they flow from mountains down to plains?
Schedule:• Creating Stream
Features Lab
Objective: •I can understand the process of erosion and deposition
Homework• Finish the lab packet-
ISN 91• RSG 5.2- ISN 90Please have on desk:• 5.2 Questions
1. Explain 3 ways water shapes land. Weathering: water can break down rocks. Erosion: water can move weathered rocks. Deposition: water can deposit eroded rocks in a new location.2. True or False? Water shapes land only on Earth’s surface. If false, rewrite a correct statement. False. Water shapes land on Earth’s surface and underground3. What does slope (how steep) of a hill or mountain have to do with how water shapes it? If it is steeper then the water moves faster creating narrow, straight valleys. If it is more flat the water moves slower creating curvier, wider streams and rivers.4. Why is fertile land often found on flat land around rivers? Floods deposit a lot of sediment onto the floodplain, which makes that land good for growing crops5. Why do caverns form in areas with limestone? Limestone is a rock that is dissolved by acid in rainwater.6. What do you call curves and bends in a stream channel? Meanders
Wednesday, November 25th Entry Task 1.Explain what features formed and what happened to the sediment on your stream table if the water was moving slow during Yesterday’s lab.2.Explain any additional stream features you created during your lab. 3.How do you know that you observed erosion and deposition during your lab. Thoroughly explain.
Schedule:• Read/RSG 5.4
HomeworkFinish 5.4 Reading and RSG
(ISN p. 93)
Objective: I can understand how glaciers carve and move sediment
Please Have on Desk:• Lab Packet