Lesson Objectives Explain how igneous rocks are formed
Lesson Objectives Explain how igneous rocks are formed. Igneous rocks 24 December 2021 Entry: in silence: 1. Format your desk. 2. Write and underline the date and title. 3. Write the LO: objective. DNA: True or false? Copy the true and correct the false. 1. Sedimentary rocks are made from layers of sediment. 2. Sedimentary rocks are porous. 3. Erosion is when small rocks break away from a larger rock. Growing Together - Reaching Higher
Lesson Objectives Self Assess Explain how igneous rocks are formed. 1. Sedimentary rocks are made from layers of sediment. True. 2. Sedimentary rocks are porous. True. 3. Erosion is when small rocks break away from a larger rock. False – erosion is when the small rocks move away from the rock it weathered away from. Growing Together - Reaching Higher
Lesson Objectives Explain how igneous rocks are formed. By the time you leave my room today…. . 1. Name some types of igneous rocks. 2. Describe the properties of igneous rocks. 3. Explain how igneous rocks are formed. Growing Together - Reaching Higher
Lesson Objectives Explain how igneous rocks are formed. Exposition: 1. Name some types of igneous rocks. Examples of Igneous rocks include Obsidian, Basalt, Granite and Gabbro 2. Describe the properties of igneous rocks. Properties of igneous rocks include: • rough • shiny • hard to very hard • do not react with acid Igneous rocks contain randomly arranged interlocking crystals. The size of the crystals depends on how quickly the molten magma solidified: • magma that cools slowly will form an igneous rock with large crystals • lava that cools quickly will form an igneous rock with small crystals This means that we get two main types of igneous rock, extrusive and intrusive, as shown in the table: Extrusive Intrusive Where the magma cooled On the surface Underground How fast the magma cooled Quickly Slowly Size of crystals Small Large Examples Obsidian and basalt Granite and gabbro Growing Together - Reaching Higher
Lesson Objectives Explain how igneous rocks are formed. Extrusive igneous rocks form from magma that erupted onto the surface as lava, where it cooled quickly. On the other hand, intrusive igneous rocks form from magma that cooled slowly, deep underground. 1. Explain how igneous rocks are formed. Igneous rocks are formed from molten rock that has cooled and solidified. The inside of the Earth is very hot - hot enough to melt rocks. Molten (liquid) rock is called magma. When the magma cools enough, it solidifies and igneous rock forms. Growing Together - Reaching Higher
Lesson Objectives Explain how igneous rocks are formed. Properties of igneous rocks • • • interlocking crystals of different coloured minerals rough shiny hard to very hard do not react with acid Basalt (Igneous) Granite (Igneous) Growing Together - Reaching Higher
Lesson Objectives Explain how igneous rocks are formed. CFU What are the properties of igneous rocks and name 2 examples? • Basalt and Granite are 2 types of igneous rocks. They are, rough, shiny, hard or very hard and do not react with acid. • Igneous rocks contain randomly arranged interlocking crystals. The size of the crystals depends on how quickly the molten magma solidified. Magma that cools slowly will form an igneous rock with large crystals. Lava that cools quickly will form an igneous rock with small crystals Growing Together - Reaching Higher
Lesson Objectives How are igneous rocks formed? Explain how igneous rocks are formed. https: //www. youtube. com/watch? v=Pr. N 7 jygu 4 c. Q Growing Together - Reaching Higher
Lesson Objectives Explain how igneous rocks are formed. CFU Write a paragraph comparing igneous rocks? • Talk about extrusive and intrusive igneous rocks • Compare how they are formed • Where they are formed • And they’re crystal sizes • Extension: What are the materials in each rock used for? Growing Together - Reaching Higher
Lesson Objectives Explain how igneous rocks are formed. CFU There are 2 types of igneous rocks known as extrusive and intrusive igneous rocks. Extrusive rocks are magma that has reached the earth's surface (now known as lava) and has rapidly cooled. This has caused the crystals in this type of igneous rock to be small. However, Intrusive igneous rocks are formed when magma is forced into older rocks at depths within the Earth’s crust, which then slowly solidifies below the Earth’s surface so that large crystals form. Growing Together - Reaching Higher
Lesson Objectives Explain how igneous rocks are formed. Do Not Disturb Describe how igneous rocks are formed. Include Examples of igneous rock Properties of igneous rocks The effect of slow cooling and fast cooling on igneous rock Keywords - (Use all keywords in your answer) Intrusive Extrusive Magma Solidification Growing Together - Reaching Higher
Lesson Objectives Explain how igneous rocks are formed. WGLL Igneous rock is formed through the cooling and solidification of magma or lava. The magma can be derived from partial melts of existing rocks in the Earth's mantle or crust. The melting is caused by one or more of three processes: an increase in temperature, a decrease in pressure, or a change in composition. Solidification into rock occurs either below the surface as intrusive rocks or on the surface as extrusive rocks. Intrusive igneous rocks form from magma that is forced into older rocks at depths within the Earth’s crust, which then slowly solidifies below the Earth’s surface so that large crystals form. Extrusive igneous rocks form when hot magma from inside the Earth flows out (extrudes) onto the surface as lava or explodes violently. The main effect of extrusion is that the magma can cool much more quickly in the open air or under seawater, so that there is little time for crystals to grow and so they are small or nonexistent. Growing Together - Reaching Higher
Lesson Objectives Exit Ticket Explain how igneous rocks are formed. 1. State what igneous rock is made of and an example of an igneous rock. 2. Describe how igneous rocks are formed. 3. Explain how the properties of igneous rocks make granite suitable to make pavements? Click below for additional information on Igneous Rocks…. . Igneous Rocks Quiz! Growing Together - Reaching Higher
Exit Routine – make it sharp and purposeful
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