Plate boundaries and their processes By the end of today’s lesson all of you will: Identify different plate boundaries using digital images and maps Know the different plate boundaries and the features of them Some of you will: Explain what happens at plate boundaries Key terms: Destructive, constructive, conservative and collision margins (boundaries) digital images, subduction, hot spots

Today I am looking for: Good observation skills Good descriptive and analysis skills Good collaberation skills Good leadership skills

What is happening at these plate boundaries in relation to convection currents kinesthetic RISING FALLING point and name boundary pupils to to the correct poster Conservative margin

Animations Destructive plate boundaries/ margins Constructive plate boundaries / margins Collision plate boundaries / margins Conservative plate boundaries / margins Hot spots Use the animations to help pupils understand concept - use digital images to show actual margin

Q & A Each student needs copy fig 5 in separate word doc, Next four slides get students using digital images to recognise features, Identify which type of boundary slide 1 – Constructive and name plates????? MID ATLANTIC RIDGE Students to have a copy of fig5 ( there is a word doc in file with it on) for this lesson glue into books to refer to when needed

Conservative SAN ANDREAS FAULT Plates????

Collision Boundary Himalayas Plates????

Destructive ANDES point out the trench dark line Plates??????

1. Describe the distribution of plate boundaries. (3 marks) 2.Identify the type of boundary or boundaries found between the The African plate and the Eurasian plate The indo Australian plate to the East of India and the Eurasian plate The Eurasian plate and the North American plate ( 3marks)

Answer – swap books – Peer assess 1) Very uneven. Two basic categories – close to continents (1 mark)or mid-ocean (1 mark). There are a few exceptions, as with the Eurasian/Indo-Australian boundary(1 mark). 2) (a) A destructive boundary/margin.( 1mark) (b) A collision plate boundary/margin.(1 mark) (c) A constructive boundary/margin.(1 mark) Total 6 marks

Group work Into groups and using the processes grid: Elect one member to be “teacher” When asked “teacher” move around to next group and teach the information By the end all columns should be completed

Type of margin / boundary Processes Main features Example Destructive plate boundary/ margin Oceanic crust destroyed Oceanic plate subducts under less dense continental plate forming fold mountains in the process Magma rises through weaknesses melting crust forming volcanoes Frequent earthquakes and volcanoes ~Ocean trench Fold mountains Nazca and South American plates Use FOLLOWING SLIDES TO SELF ASSESS THE PROCESS GRID

Type of margin / boundary Processes Main features Example Constructive plate boundary/ margin New basaltic material rises to the surface forcing oceanic plates Hot magma is able to fill the “gap” creating new crust. As magma continues to build up new mountain ranges form under sea = mid-ocean ridge Magma continues to rise until eventually above sea = volcanic island New crust created Mid Ocean ridges Volcanoes Earthquakes Mid Atlantic ridge between the Eurasian and North Amercian plates Volcanic islands Surtsey and Iceland

Type of margin / boundary Processes Main features Example Collision Plate boundaries/margins Two continental plates moving towards each other Same density so no subduction crusts buckle and fold = no volcanoes Crust neither formed or destroyed Fold mountains Earthquakes common Himalayan mountain chain Tibetan plateau Pakistan earthquake 2005

Type of margin / boundary Process Main features/processes Example Conservative plate boundaries/margins Plates slide past each other = Crust neither created or destroyed because no magma or subduction Friction between plates = extreme stress builds in crustal rocks when released = earhtquake Longer period of movement = more stress build up so when released = more energy significant earthquake Earthquakes San Andreas fault- North American and Pacific plates (same direction slip)

Plenary Student book page 17 bottom corner key words quiz