{"id":25054,"date":"2018-06-01T11:05:25","date_gmt":"2018-06-01T11:05:25","guid":{"rendered":"https:\/\/www.aplustopper.com\/?p=25054"},"modified":"2020-10-16T17:09:11","modified_gmt":"2020-10-16T11:39:11","slug":"icse-solutions-for-class-9-geography-volcanoes","status":"publish","type":"post","link":"https:\/\/www.aplustopper.com\/icse-solutions-for-class-9-geography-volcanoes\/","title":{"rendered":"ICSE Solutions for Class 9 Geography – Volcanoes"},"content":{"rendered":"
ICSE Solutions<\/a>Selina ICSE Solutions<\/a>ML Aggarwal Solutions<\/a><\/p>\n Exercises<\/strong><\/span><\/p>\n I. Short Answer Questions.<\/strong><\/p>\n Question 1.<\/strong><\/span> Question 2.<\/strong><\/span> Question 3.<\/strong><\/span> Question 4.<\/strong><\/span> Question 5.<\/strong><\/span> Question 6.<\/strong><\/span> Question 7.<\/strong><\/span> Question 8.<\/strong><\/span> Question 9.<\/strong><\/span> Question 10.<\/strong><\/span> Question 11.<\/strong><\/span> Question 12.<\/strong><\/span> Question 13.<\/strong><\/span> Question 14.<\/strong><\/span> Question 15.<\/strong><\/span> II. Match the following III. Fill in the blanks below<\/strong><\/p>\n IV. Long Answer Questions<\/strong><\/p>\n Question 1.<\/strong><\/span> Question 2.<\/strong><\/span> Question 3.<\/strong><\/span> (a) Volcanic Plateaus :<\/strong> These are derived from lava which flows from volcanic eruptions. The Plateau of Peninsular India especially the north western Deccan is an example of lava plateau. Other examples are South African plateau Columbian Plateau and Ethiopian plateau. Question 4.<\/strong><\/span> Question 5.<\/strong><\/span> Question 6.<\/strong><\/span> Practice Questions (Solved)<\/span> Question 1.<\/strong><\/span> Question 2.<\/strong><\/span> Question 3.<\/strong><\/span> Question 4.<\/strong><\/span> Question 5.<\/strong><\/span> Question 6.<\/strong><\/span> Question 7.<\/strong><\/span> Question 8.<\/strong><\/span> Question 9.<\/strong><\/span> Question 10.<\/strong><\/span> Answer:<\/strong><\/span><\/p>\n Question 11.<\/strong><\/span>
\nWhat are known as volcanoes ?
\nAnswer:<\/strong><\/span>
\nVolcanoes are the vents in the earth\u2019s crust erupting hot magma from the interior core motivated by endogenic forces.<\/p>\n
\nWhat is the difference between magma and lava ?
\nAnswer:<\/strong><\/span>
\nMolten material moving under the earth\u2019s crust is called magma. When magma comes to the surface of the earth it is known as lava.<\/p>\n
\nGive one example each of an active volcano and a dormant volcano.
\nAnswer:<\/strong><\/span><\/p>\n\n
\nWhat is the difference between dormant volcano and an extinct volcano ?
\nAnswer:<\/strong><\/span>
\nDormant volcano can erupt at any interval but extinct volcano can never erupt again.<\/p>\n
\nWhat is the magma chamber of a volcano ?
\nAnswer:<\/strong><\/span>
\nThe magma chamber is created by the molten magma itself by melting the surrounding rocks in the form of a huge chamber.<\/p>\n
\nName two types of landforms made by volcanoes.
\nAnswer:<\/strong><\/span>
\nTwo types of landforms are :<\/strong><\/p>\n\n
\nExtrusive landforms include crater composite cones caldere lava platforms.<\/li>\n
\nIntrusive landforms include dykes batholiths laccoliths volcanic hill etc.<\/li>\n<\/ol>\n
\nWhat is called the Pacific Ring of Fire ? Why is it called so ?
\nAnswer:<\/strong><\/span>
\nThere are 80% active volcanoes around the Pacific ocean which is called the Ring of Fire.<\/p>\n
\nName the three types of volcanoes on the basis of the frequency of their eruption.
\nAnswer:<\/strong><\/span>
\nThere are three types of volcanoes e.g. active volcano which is still active in erupting magma dormant volcano which erupts in uncertain intervals and extinct volcano which has stopped eruption permanently it is also called dead volcano.<\/p>\n
\nWhat are known as Shield volcanoes ?
\nAnswer:<\/strong><\/span>
\nA volcanoes erupting with plentiful lava spreading over the surface into several kilometres with huge circumference and taking a shape of shield are called as shield volcanoes.<\/p>\n
\nMention any two extrusive landforms caused by volcanic eruptions.
\nAnswer:<\/strong><\/span><\/p>\n\n
\n<\/li>\n
\n<\/li>\n<\/ol>\n
\nName any two intrusive landforms made by volcanic eruptions.
\nAnswer:<\/strong><\/span><\/p>\n\n
\n<\/li>\n<\/ol>\n
\nHow are hot springs formed ?
\nAnswer:<\/strong><\/span>
\nThe movement of magma heats up the underground water which converts into steam and gushes out through any crack or holes on the crust.<\/p>\n
\nWhat is called the Pacific Ring of Fire ? Why is it called so ?
\nAnswer:<\/strong><\/span>
\nThere are 80% active volcanoes around the Pacific ocean which is called the Ring of Fire.<\/p>\n
\nGive an example each of conical volcano and fissure volcano.
\nAnswer:<\/strong><\/span>
\nMount Fuji in Japan is a conical volcano and Columbia plateau in South America and Deccan plateau in India are the examples of fissure volcanoes.<\/p>\n
\nWhat is the difference between dormant volcano and an extinct volcano ?
\nAnswer:<\/strong><\/span>
\nDormant volcano can erupt at any interval but extinct volcano can never erupt again.<\/p>\n
\n<\/strong>
\nAnswer:
\n
\n<\/strong><\/span><\/p>\n\n
\nExplain the various parts of a volcano.
\nAnswer:<\/strong><\/span>
\nA volcano represents some typical parts e.g. the molten rock or magma mostly lava makes the conical body of a volcano. Magma chamber is the source of erupting magma. Vent is the main channel through which the magma erupts outwards. Crater is the mouth or uppermost part of a volcano which is a big hole from which magma erupts and spreads all over.
\n<\/p>\n
\nDescribe the causes of volcanic eruptions.
\nAnswer:<\/strong><\/span>
\nThe main causes of volcanic eruptions are the following :<\/strong><\/p>\n\n
\nExplain briefly the landforms created by volcanoes on the surface of the earth.
\nAnswer:<\/strong><\/span>
\nThe landforms created on earth\u2019s surface are called Extrusive Landforms. These include volcanic plateaus volcanic mountains and volcanic plains.<\/p>\n
\n(b) Volcanic Mountains :<\/strong> These mountains are built from material ejected from the fissures in the earth\u2019s crust. Volcanic mountains are the most diverse because there are great differences in volcanic eruptions as well as the materials they throw up.
\n(c) Volcanic Plains :<\/strong> These plains are vast and smooth formed by extensive volcanic flooding from volcanic centres. The Western Victorian Plains in Victoria Australia are the finest examples of Volcanic Plains.<\/p>\n
\nWrite any three destructive effects of volcanoes.
\nAnswer:<\/strong><\/span>
\nDestructive Effects :<\/strong><\/p>\n\n
\nDescribe the distribution of volcanoes in the world.
\nAnswer:<\/strong><\/span>
\nVolcanoes are found along the weak zones of the earth\u2019s crust where due to continuous tussle by tectonic forces maximum active volcanoes have created. These are<\/p>\n\n
\nDescribe important volcanic landforms on earth.
\nAnswer:<\/strong><\/span>
\nProminent landforms associated with volcanoes are composite cones built of multiple material erupted out from a volcano. Conical hills are common in volcanic areas Crater lake is formed along the mouth of a conical volcano which is filled with water after cooling down of volcano. Due to repeated eruptions mouth of a volcano is converted into a large depression called caldera. Lavashields are made by large amount of basic lava flows making volcanic shields with a gentle slope.
\nLava plateau :<\/strong> is formed by large scale fissure eruptions covering extensive area e.g Columbia plateau in South America and Deccan plateau of India.<\/p>\n
\n<\/strong><\/span><\/p>\n
\nName three causes of volcanic eruptions.
\nAnswer:<\/strong><\/span><\/p>\n\n
\nName the largest active volcano in the world.
\nAnswer:<\/strong><\/span>
\nMauna Loa (Hawaii islands).<\/p>\n
\nWhich volcano is known as the \u2018light house of the Mediterranean ?
\nAnswer:<\/strong><\/span>
\nStromboli.<\/p>\n
\nName the three belts where volcanoes are found.
\nAnswer:<\/strong><\/span><\/p>\n\n
\nIn which belt most of the volcanoes of the world are found ?
\nAnswer:<\/strong><\/span>
\nCircum Pacific Belt.<\/p>\n
\nName three causes of Earthquakes.
\nAnswer:<\/strong><\/span><\/p>\n\n
\nWhat is epicentre ?
\nAnswer:<\/strong><\/span>
\nThe point on Earth\u2019s surface vertically above the focus is called epicentre.<\/p>\n
\nIndicate the world distribution of active volcanoes.
\nAnswer:<\/strong><\/span>
\nThere are about 500 active volcanoes. Most of them are confined to Circum-Pacific Belt and Mid World Mountain Belt.<\/p>\n
\nGive two reasons why tremors occur inside the earth?
\nAnswer:<\/strong><\/span><\/p>\n\n
\nDistinguish between :<\/strong><\/p>\n\n
\n
\nDescribe the materials thrown out during volcanic eruption.
\nAnswer:<\/strong><\/span>
\nThe materials thrown out of a volcano due to eruptions are of three types :<\/strong><\/p>\n\n