Unit 3: the Earth S Relief

UNIT 3: THE EARTH’S RELIEF.

VOLCANOES. Volcanoes erupt when high pressure forces out magma from the Earth's mantle.

1. Magma from the mantle is forced upwards through a hole in the Earth's crust and rises through the vent. 2. The magma comes out through the crater at the top of the volcano. When the magma comes out it is called lava. 3. The eruption also produces ash, gases and volcanic bombs. 4. The shape of a volcano is called a cone. The cone is made of lava from previous eruptions.

EARTHQUAKES. Across

1. Depressions of the sea floor 5. A group of mountains. 8. A low altitude area of land. 9. Big waves caused by an earthquake at the sea. 11. Hole at the top of a volcano. 12. Molten rock that comes out of a volcano. 14. A low area of flat land. 16. A deep narrow passage with steep rocky sides 18. A large bay. 19. Tectonic ______20. Area of land surrounded by sea on all sides except one. 22. A large area of extremely flat or gently sloping ocean floor just offshore from a continent, at depths of 6000 metres. 23. The point of Earth's surface above the focus of an earthquake. 27. Makes the ground shake 29. The sea bed surrounding a continent. 30. A group of islands. Down

2. Surface layer of the Earth 3. Underwater mountain ranges. 4. Shape of a volcano 6. Center of the Earth. 7. Layer of the Earth made of magma. 10. Head of land projecting into a body of water 13. When it erupts, it sends out lava,ash and gases and volcanic bombs. 15. A natural elevation of the earth's surface rising more or less abruptly to a summit 17. Area of land between two mountains. 21. Land completely surrounded by water. 24. A narrow strip of land connecting two relatively large land areas 25. An area of water like the Atlantic or Pacific. 26. A flat area at high altitude. 28. A sandy area by the sea. 29. A steep high rock face 1 2

9 10 11

12 13 14 15

EclipseCrossword.com