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HW 1: Ocean Trenches. Describe the location of ocean trenches ( 2 marks ). HW 1 : Do a research on ocean trenches. Log on to youtube . Watch a view videos on ‘formation of ocean trenches’. See clip below. Then answer the questions below : http:// www.youtube.com/watch?v=p_L1bvcvvWs.

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hw 1 ocean trenches
HW 1: Ocean Trenches

Describe the location of ocean trenches (2 marks)

Dwight Sutherland 2013

slide2

HW 1: Do a research on ocean trenches. Log on to youtube. Watch a view videos on ‘formation of ocean trenches’. See clip below. Then answer the questions below: http://www.youtube.com/watch?v=p_L1bvcvvWs

  • What are ocean trenches? (2 marks)
  • Explain the formation of ocean trenches. You should refer to plate tectonics. (4 marks)
  • Where is the ocean trench on the diagram below A,B or C? (1 mark)

A

Volcanoes

Ocean

B

C

Oceanic plate

Continental plate

Dwight Sutherland 2013

slide3
Mt. St. Helens, USA (MEDC)

Erupted May 18, 1980

61 deaths caused mainly by the release of poisonous gas

Logging camps were mainly destroyed, not settlements.

Located in a largely countryside area of Washington.

Nearest town to the volcano was 35 km.

Most settlements were over 50 km away.

Small settlements were located over 35 km from volcano zone of total destruction

About 250km² of forest was destroyed.

Communication and utility services were badly affected.

Farm land was affected and lost about 12% of their total crop.

Mt. Pinatubo, The Philippines (LEDC)

Erupted 1991

Located 100km of Manila, near to the US Clark Air Base and Angeles City.

Over 25 000 lived at the Air Base and 250 000 people lived in Angeles City.

About 30 000 people lived in small farming villages on Pinatubo’s slopes

700 people died, 184 injured.

About 4000km² of forest was affected.

Emitted 20 million tonnes of sulphuric dioxide.

Communication and utility services were badly affected

Over 250 000 people lost their jobs as a result of the eruption.

HW 2: Comparing Two VolcanoesTASK: Describe how the effects of a volcano in a richer area of the world are different from the effects of a volcano in a poorer area of the world. Use the information below to help you. (6 marks)

Dwight Sutherland 2013

hw 3 task below is a diagram of the yellowstone super volcano answer the questions about it
HW 3: TASK: Below is a diagram of the Yellowstone super volcano. Answer the questions about it.

Super volcano diagram

Caldera

What is a super volcano? (2 marks)

Magma chamber (on top of the hot spot)

Hot spot (below the earth’s crust)

What is the caldera of a super volcano? (2 marks)

What is volcanic explosivity index (VEI) of a super volcano? (2 marks)

What is a hotspot of a super volcano? (2 marks)

Dwight Sutherland 2013

slide5
HW 4: Describe the likely effects of a super volcano eruption (6 marks). Watch the video on Yellowstone below to help you.
  • http://www.youtube.com/watch?v=pvgKhI-10AM

Dwight Sutherland 2013

hw 5 with the help of a diagram s explain the formation of young fold mountains 8 marks
HW 5: With the help of a diagram(s), explain the formation of young fold mountains. (8 marks)

Keywords to use:

  • Anticline
  • Synclines
  • Buckle
  • Rocks on sea bed

Dwight Sutherland 2013

slide7

HW 6: Study Figure 1 on the insert (see below), photographs of how people use fold mountains. Describe how people are using fold mountains in the photographs. (6 marks)

Figure 1

Cingino dam in the Italian Alps

Dwight Sutherland 2013

slide8

HW 7: Fold mountain areas suffer from limited communications, steep slopes and poor soils. Describe how people have coped with one or more of these problems. (4 marks)

Dwight Sutherland 2013

slide10

TASK: Use the mercalli scale below to give a rating for the earthquakes shown in each image below. Give reasons for your answer. (3 marks for each picture)

Mercalli scale measures how the earthquake feels to humans.

Dwight Sutherland 2013

slide11

Describe how the effects of an earthquake in a richer area of the world are differentfrom the effects of an earthquake in a poorer area of the world. (6 marks)

Dwight Sutherland 2013

slide12

TASK: Label step by step on the diagram how the Japan tsunami was formed. Label your steps 1, 2, 3 etc. Use the statements below to help you.

  • The earthquake causes one side of the ocean floor is pushed upwards above the other side.
  • The heavier Pacific Plate sinks below the Eurasian plate.
  • As the ocean floor pushes upward it forces up the ocean/sea forming large waves which is a tsunami.
  • The Eurasian plate and the Pacific plate collides.
  • Where the Pacific plate sinks beneath the Eurasian plate an earthquake happens.

Dwight Sutherland 2013

task finish the sentences below the numbers in green represent the allocated marks
TASK: Finish the sentences below. The numbers in green represent the allocated marks.
  • Attrition along a coast is (2)
  • The coastline is (1)
  • Waves are formed by (2)
  • Hydraulic pressure happens when (2)
  • Mass movement is the name given to (1)
  • Weathering and erosion are coastal processes. They are different because (2)
  • By the way coastal processes are (1)
  • When coastal material are being transported this means that they are (2)
  • Deposition is the final stage of coastal processes. This is because in deposition sediments are (1)
  • For chemical weathering to happen rocks have to be (2)
  • Biological weathering occurs when (2)
  • On the other hand mechanical (physical) weathering occurs when (2)

Dwight Sutherland 2013

task finish the sentences below the numbers in green represent the allocated marks1
TASK: Finish the sentences below. The numbers in green represent the allocated marks.
  • Freeze-thaw weathering is a type of weathering that happens in cold places when (3)
  • The opposite of freeze-thaw weathering is exfoliation. This happens in hot places when (3)
  • Onion skin peeling weathering is called onion peel weathering because (2)
  • Corrasion or abrasion is a form of (1)
  • Corrosion or solution is when waves cause (2)
  • Slumping and landslide are two form s of mass movement. The difference between them is that (3)
  • Soil creep and mud flow are very similar. They both involve (2) They are different because
  • In rockfall rocks from a cliff (1)
  • All of these processes are sub-aerial processes which means (1)
  • Two things that can speed up sub-aerial processes are deforestation and intense farming. Deforestation is Intense farming is (2)

Dwight Sutherland 2013

label the bay 1 mark
Label the bay (1 mark)

Dwight Sutherland 2013

label the spit 1 mark
Label the spit (1 mark)

Dwight Sutherland 2013