Unit 10 Discover Volcanoes
Let’s talk What do I know about volcanoes? What do I want to know? Make up three questions. Draw a KWL chart and complete the first two columns. K What I k now W What I w ant to know
Comprehension strategy
L What I l earnt
Complete the chart after reading the text below. Reading Scan the text below to find out the following information:
• the names of two well-known volcanoes • the number of active volcanoes each year.
Discover Volcanoes
Heading
What is a volcano? A volcano is a place where gas and molten rock erupt through the rock layers of the Earth’s crust. There are different types of volcanoes: some are just cracks in the ground, but others form cones with a crater at the top. Some volcanoes are buried under the ocean floor. The inside of the Earth contains magma , which is molten rock. From time to time the magma erupts through the Earth’s ash cloud crater lava flow
Diagram
layers of lava and ash
surface as lava . When the lava flows down the sides of the cone, it cools down and becomes solid. Volcanic eruptions can cause great damage and loss of life and property.
rock layers of the Earth’s crust
magma
• KWL strategy helps students approach expository writing by drawing on their prior knowledge. The W column focuses their attention on what they hope to gain by reading the text. • Ask students where they might find this text, e.g. in an encyclopaedia , in a school textbook . • Discuss the purpose of the text, and the likely audience.
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