Do all volcanoes kill? To recap plate boundaries and the location of tectonic activity To distinguish between composite and shield volcanoes To understand the effects of an eruption Key terms: composite volcano, shield volcano, basalt, andesite L

Plate Boundaries Recap Can you name both these plate boundaries and explain what happens at each. Look back over your notes to help. 1.2.

Describing tectonic activity Describe means to say what something is like. You could have said: Earthquakes and volcanoes occur on plate boundaries They occur around the Pacific Ocean – this is known as the Ring of Fire They don’t tend to occur away from boundaries. Describe the location of earthquakes and volcanoes on the map below. 3 marks (so make 3 points).

Volcanoes Recap *Watch the clip. Try to write down a definition for volcanoes Try to note down a famous volcano. Try to note down what is erupted from a volcano (there’s more than one thing!)

Features of a volcano 1.Dust 2.Ash 3.Crater/lava 4.Volcanic bomb 5.Pyroclastic flow 6.Layers of lava and ash 7.Crust 8.Main vent 9.Magma chamber 10.Secondary vent

Two very different volcanoes This is Mauno Loa on Hawaii. It is a shield volcano. It is gently sloping, and does not produce violent eruptions. It has actually created the island of Hawaii! This is Mount Merapi in Indonesia. It is a composite volcano. It is steep sided volcano, and has violent eruptions. It is the world’s most active volcano!

Two very different volcanoes This is a cross section of Mauno Loa on Hawaii. Copy the diagram. Make sure it has a title and labels. This is a cross section of Mt Merapi in Indonesia. Copy the diagram. Make sure it has a title and labels.

Killer Volcanoes? Not all volcanoes kill. Some like Mount Merapi in Indonesia do. But some like Mauna Loa in Hawaii don’t. Why? Well it’s all down to the lava that makes the volcano. Shield volcanoes are made from a thin runny lava (called basalt). This lava will not get stuck in the volcano vent. The eruption will be freely flowing and gentle (like pouring water from a jug). They are found on constructive boundaries. Composite volcanoes are made from a thick sticky lava (called andesite). This lava will get stuck in the main vent and cause pressure to build up. The eruption will be violent and will be a pyroclastic flow (a bit like when you shake up a bottle of coke and open it quickly). They are found on destructive boundaries. Answer the questions on The 2 Types of Volcano sheet

The Eruption How many effects can you spot? How do people respond to the threat in this clip?

The Eruption Make a concept map or list of all the effects of an eruption. How many can you get? Ash fall Kills plants and animals People suffocated Less food Dust Pyroclastic flow Incinerates blast zone Roads cut off Lava erupted Towns destroyed Industries bankrupt Death People evacuate Huge financial cost Tourism destroyed Farmland ruined Roofs collapse Trauma