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Elements at muriwai - yr13
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Elements at muriwai - yr13

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Elements at muriwai for use with the muriwai workbook.

Elements at muriwai for use with the muriwai workbook.

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Transcript

  • 1. Elements at Muriwai Pg 16 and 17
  • 2. ELEMENTS CURRENTS • Strong rip currents due to high energy beach • Force of waves sideways affect seafloor TIDES • Highest tide is 4.3m (compared to 3.3m at St Leonards) • Occurs when sun and moon are in line and the gravitational pull is the greatest (full moon) SEDIMENT • 2 main types – black iron sand (titanomagnetite) and lighter coloured white sand (quartz and feldspar). Only 5% produced by erosion, majority brought in by longshore drift from volcanic regions in the South • Iron sand is smaller in diameter (0.25mm) compared to quartz grains (0.5mm) • Both are light enough to be picked up by the wind
  • 3. ELEMENTS ROCK TYPE • The headland is composed of Manuka Breccia which is a conglomerate (mixture) of sandstone with volcanic intrusions BIOTA • Headland vegetation is pohutukawa, manuka trees and flax which have adapted to extreme weather conditions • Sand dunes have minimal vegetation. Spinifex, pingao and marram grass grow on the dunes trapping sediment • Endangered tohera shellfish beds • Gannet colony on Motutara Stack • Fur seals on Oaia Island
  • 4. WATER ELEMENTS
  • 5. LAND ELEMENTS
  • 6. CLIMATIC ELEMENTS
  • 7. BIOTIC ELEMENTS
  • 8. Wind Rose pg 17 • A wind rose is a diagram that tell us information about wind in an area. It tells us – Direction of wind – Force or speed of wind – How long the wind blew at that speed/direction
  • 9. How to draw a wind rose pg 17 • Draw a small circle (or an octagon if you prefer) in the middle of page or area given • Mark in your 4 main compass points with dashes • Calculate a scale e.g. 1cm = 5 knots • Draw a key e.g. 3-15 knots Over 15 knots • Rule out bars in the direction wind blew for the length of time (%) it blew. Shade in bar the appropriate wind speed
  • 10. Climate Graph pg 18 • Plot the information given in the table at the top of page 18 on to the climate graph outline • Look for some reminders of appropriate conventions of a climate graph on the next slide….
  • 11. Left hand axis shows temp, axis is labelled with degrees celsius Title includes LOCATION and GRAPH TYPE Points for the temperature are plotted in the MIDDLE of a column and joined with a SMOOTH curve Temperature is shown using a LINE graph and is done using RED Right hand axis shows rainfall. Axis is labelled with mm Rainfall is shown using a BAR graph and is shaded in BLUE Months are represented down the bottom with a letter
  • 12. Significance of climate • Below the climate graph write 2-3 sentences describing the significance of climate to the natural environment at Muriwai.