Voyage Solutions for ICSE Class 6 Geography Chapter 7 Minerals And Ores Exercises

POINTS TO REMEMBER

1. Minerals are substances that are naturally present in the earth and are not formed from animal or vegetable matter.
2. An ore is a naturally occurring solid material from which a mineral, generally a metal, can be profitably extracted.
3. Minerals are generally classified as metallic and non-metallic minerals.
4. Metallic minerals include iron ore, uranium, bauxite, manganese, gold, silver and copper.
5. Non-metallic minerals include limestone, mica, coal and petroleum.
6. Mining is the process of taking out minerals and other substances from the earth.
7. There are two types of mining - surface mining and underground mining.
8. It is important to conserve minerals as they take thousands of years to form.

IMPORTANT TERMS

1. Ferrous minerals : Minerals which contain iron, such as iron ore, manganese and chrome.
2. Non - ferrous minerals : Minerals that do not contain iron, such as gold, silver, copper and lead.
3. Ore : A naturally occurring solid material from which a particular mineral, usually a metal, can be profitably extracted.

THINK AND ANSWER

Question 1: How would our life be affected if coal, petroleum and natural gas were exhausted in the next 30 years?

Answer:
If all the exhaustible natural resources are exhausted by human activities, then the survival of living beings would not be possible. Actually, fossil fuels are the most important source of energy for us today. They are concentrated source of energy and give off heat and light on burning. The heat can be used to cook food or to run engines such as automobile engines. It can be used to generate electricity as in powerhouse where the most common fuel used is coal. Everything will not be available. These fossil fuels take millions of years to form deep inside the earth's crust. If they disappear, we would struggle to maintain our modern technology and transportation systems.
Teacher's Tip: Think of fossil fuels like a battery that takes forever to charge but can be used up very quickly!
Exam Tip: Mentioning that these are "non-renewable" resources helps show a deeper understanding of the problem.

VALUES AND LIFE SKILLS

Question 1: Can you suggest some ways by which we can reduce the use of conventional energy resources?

Answer:
1. Use more energy efficient by using energy saver products like LED lights etc.
2. Use Bicycles for shorter distances instead of cars or bikes.
3. Switch off the lights when not required. Making these small changes in our daily habits can lead to a massive reduction in overall energy consumption. It also helps in reducing pollution and preserving the environment for the future.
Teacher's Tip: Remember the "Switch to Save" rule - if you aren't using a room, switch off the light!
Exam Tip: Using terms like "energy-efficient" and "sustainable habits" will help you score higher marks.

EXERCISES

A. Fill in the blanks

Question 1: All rocks are composed of minerals.

Answer:
minerals. Minerals are the basic building blocks that combine in different ways to form the various types of rocks found on Earth. Every rock you see is actually a mixture of one or more of these natural substances.
Teacher's Tip: Think of minerals as the "ingredients" and the rock as the "cake"!
Exam Tip: Be sure to memorize the definition of minerals as "naturally occurring substances" for clarity.

Question 2: Minerals are obtained by a process called mining.

Answer:
mining. This process involves digging deep into the ground to reach the layers of rock where valuable minerals are hidden. Depending on how deep the minerals are, engineers use either surface or underground methods.
Teacher's Tip: Mining is like a giant treasure hunt where we look for wealth hidden inside the Earth.
Exam Tip: Remember that mining is an "extractive industry" because it takes materials out of nature.

Question 3: Metallic minerals are generally found in igneous rocks.

Answer:
igneous. Igneous rocks are formed from cooling lava or magma, which often carries concentrated amounts of heavy metals like iron and gold. These rocks are usually very hard and are a primary source for our metal industries.
Teacher's Tip: "Igneous" sounds like "Ignite" - think of hot magma forming these metal-rich rocks!
Exam Tip: If the question asks where metals come from, "Igneous" and "Metamorphic" rocks are the top answers.

Question 4: Ferrous minerals contain iron.

Answer:
iron. The term "Ferrous" comes from the Latin word for iron, which is "Ferrum," represented by the symbol $Fe$. These minerals are magnetic and are essential for making strong materials like steel.
Teacher's Tip: Just remember "F-E" for "Iron" and "Ferrous" starts with "F"!
Exam Tip: Always categorize manganese as a ferrous mineral even though it is not iron itself, because it is used with iron.

Question 5: Peat has very little carbon.

Answer:
carbon. Peat is the earliest stage of coal formation and still contains a lot of moisture and plant matter. Because it has the lowest carbon content, it produces a lot of smoke and very little heat when burned.
Teacher's Tip: Think of Peat as "baby coal" that hasn't grown strong and dark yet.
Exam Tip: Remember the order of coal quality: Peat, Lignite, Bituminous, and Anthracite (lowest to highest carbon).

B. Write true or false

Question 1: Metals can be profitably extracted from ores.

Answer:
True. An ore must have a high enough concentration of a metal so that the cost of mining it is less than the value of the metal obtained. This economic factor is what turns a regular rock into a valuable ore.
Teacher's Tip: Profit is the "Magic Word" that separates an ordinary rock from an ore!
Exam Tip: A statement is only "True" if the extraction is "profitable"; otherwise, it is just a mineral-bearing rock.

Question 2: Metallic minerals are generally found in sedimentary rocks.

Answer:
False.
Correct - Metallic minerals are generally found in igneous rocks. While some metals can be found elsewhere, the vast majority are concentrated in igneous and metamorphic formations due to intense heat and pressure. Sedimentary rocks are more famous for holding non-metallic fuels like coal and petroleum.
Teacher's Tip: Metals love the "Heat" of igneous rocks, while fuels love the "Layers" of sedimentary rocks!
Exam Tip: Always specify the rock type when correcting a false statement to show full knowledge.

Question 3: Bauxite is the lightest metal.

Answer:
True. Bauxite is the ore used to produce aluminum, which is well-known for its low density and high strength. This property makes it the perfect material for building airplanes and lightweight vehicles.
Teacher's Tip: Bauxite starts with "B" - think of "Balloons" which are light, just like this metal!
Exam Tip: Note that Bauxite is the "ore" and aluminum is the "metal" it produces.

Question 4: Bituminous coal has the highest carbon content.

Answer:
False.
Correct - Anthracite coal has the highest carbon content. Anthracite is the hardest and purest form of coal, burning with a very clean, hot flame. Bituminous coal is the most common type used, but it still has more impurities than anthracite.
Teacher's Tip: "Anthracite" starts with "A" - it is the "A-Grade" (top quality) coal!
Exam Tip: List anthracite as having $90\%$ or more carbon to provide a high-level answer.

Question 5: Mica is a metallic mineral.

Answer:
False.
Correct- Mica is a non-metallic mineral. Mica is widely used in the electronics industry because it acts as an excellent insulator and does not conduct electricity. It is recognizable by its thin, shiny, and transparent layers.
Teacher's Tip: Mica doesn't make a "clink" sound like metal; it is non-metallic and used in switches!
Exam Tip: Group mica with limestone and gypsum as examples of non-metallic minerals.

C. Match the columns

Answer:
1. anthracite - (v) coal
2. limestone - (iv) non-metallic mineral
3. copper - (i) metallic mineral
4. petroleum - (ii) black gold
5. bauxite - (iii) light metal
Matching these correctly shows how we categorize natural resources based on their physical properties and economic value. For example, petroleum is called "black gold" because it is extremely valuable to a country's wealth.
Teacher's Tip: Use the "elimination method" - match the ones you are $100\%$ sure of first!
Exam Tip: Write the matching pairs side-by-side in your answer sheet rather than drawing messy lines.

D. Answer the following questions in brief:

Question 1: What is a mineral?

Answer:
Minerals are substances that are naturally present in the earth and are not formed from animal or vegetable matter. They are inorganic substances with a fixed chemical composition and specific physical properties. We use minerals in almost everything, from the salt in our food to the steel in our buildings.
Teacher's Tip: Minerals are "Non-Living" treasures found deep inside the ground!
Exam Tip: Define a mineral as "inorganic" to clearly distinguish it from organic materials like wood.

Question 2: Name a few minerals.

Answer:
Diamonds, quartz, topaz, gypsum, iron, copper, bauxite, zinc, gold, silver, manganese, etc. This list includes both precious stones used in jewelry and industrial metals used in construction. Each of these minerals has unique characteristics like color, hardness, and luster.
Teacher's Tip: Look at your jewelry or your kitchen utensils; you'll find minerals everywhere!
Exam Tip: Providing a mix of metallic (iron) and non-metallic (gypsum) examples shows a well-rounded answer.

Question 3: What is an ore?

Answer:
An ore is a naturally occurring solid material that contains a large amount of a particular material, using a metal which can profitably extracted, eg. iron ores, copper ores, bauxite (from which aluminium is extracted) zinc, etc. An ore is essentially a "rock with a job" because it contains enough of a specific element to make mining it worthwhile. Most metals are found in the form of ores rather than in their pure state.
Teacher's Tip: Every ore is a mineral, but not every mineral is an ore - it must be profitable!
Exam Tip: Always include an example like "Bauxite for Aluminum" to strengthen your definition.

Question 4: What is the main difference between a ferrous and a non- ferrous mineral?

Answer:
Ferrous minerals :
1. These minerals contain iron.
2. They have high tensile strength.
3. Examples: Iron ore, manganese and chrome.
Non-ferrous minerals:
1. These minerals does not contain iron.
2. They have low tensile strength.
3. Examples: Gold, silver, copper and lead.
The presence or absence of iron determines whether a mineral will be magnetic and how easily it might rust. This chemical difference is what makes ferrous minerals great for heavy construction and non-ferrous ones better for delicate work.
Teacher's Tip: "Ferrous" = "Iron-us"! Just look for the iron to tell them apart.
Exam Tip: Presenting differences in a point-wise or tabular format is the best way to get full marks.

Question 5: Mention any two characteristics of iron ore.

Answer:
The most important mineral in the world is iron ore. It is known for its hardness, strength and ductility (it can be made or stretched into a thin wire). These properties allow iron to be transformed into everything from giant skyscrapers to tiny sewing needles. It is also highly durable, which is why it is the backbone of our modern infrastructure.
Teacher's Tip: Ductility means the metal is "flexible" enough to be pulled into a long wire without breaking.
Exam Tip: Focus on "strength" and "ductility" as the two primary scientific characteristics.

Question 6: Mention the different types of iron ore.

Answer:
There are four different types of iron ores-haematite, magnetite, limoniteandsiderite. Magnetite is the highest quality ore because it has very high iron content and magnetic properties. Haematite is also very important and is the type most commonly mined in industrial quantities.
Teacher's Tip: Use the initials "H-M-L-S" to remember the four types in order!
Exam Tip: Mention that "Magnetite" is the "Magnetic" ore to add a special detail to your answer.

Question 7: What is surface mining?

Answer:
When the top layer of soil is removed and the rocks that lie underneath are extracted with the help of heavy machinery is called surface mining. Surface mining is done to extract minerals that are found close to the surface such as coal and some kinds of sedimentary rocks like limestone and mica. This method is generally cheaper and safer than digging deep tunnels underground. It leaves a large open pit on the surface, which is why it is often called open-cast mining.
Teacher's Tip: Surface mining is like "peeling" the Earth's skin to get to the goodies underneath!
Exam Tip: Mention that this method is used for minerals found "close to the surface" to explain its name.

Question 8: Mention any three uses of coal.

Answer:
Coal is used for various purposes like cooking, heating and producing electricity, and in various industries. In power plants, coal is burned to boil water and create steam, which then spins giant turbines to generate power. It is also an essential raw material used in the production of iron and steel.
Teacher's Tip: Coal is "Solid Sunshine" - it's old plant energy turned into a black rock!
Exam Tip: Always include "Electricity Generation" as the most important modern use of coal.

E. Answer the following questions in one or two paragraphs

Question 1: Differentiate between metallic and non-metallic minerals.

Answer:
Metallic Minerals :
1. These minerals contain metals, which are hard substances.
2. These minerals found in igneous rocks.
3. Examples: Iron ore, bauxtie, manganese and copper, etc.
Non-metallic Minerals:
1. These minerals does not contain extractable metals.
2. These minerals found in sedimentary rocks.
3. Examples: Coal, potash, limestone, gypsum, mica, etc.
Metallic minerals are shiny and can be beaten into thin sheets, whereas non-metallic minerals are usually brittle and break easily. This basic physical difference determines how we use them in everything from electronics to building materials.
Teacher's Tip: Metals are "Malleable" (easy to shape), but non-metals just "Mash" (break apart)!
Exam Tip: Contrast the "rock types" (Igneous vs. Sedimentary) for a more scientific explanation.

Question 2: Give an account of iron ore production in the world.

Answer:
Iron is the main metal used for making steel, which is used in almost all industries. The main producers of iron are China ($42\%$), Australia ($22\%$), Brazil ($10\%$), South Africa, etc. India produces about $4\%$ of total iron ore. Main states in India are Odisha, MP, Jharkhand, Andhra Pradesh, Tamil Nadu. Most of the world's iron is used for infrastructure projects like building bridges and high-rise apartments. As countries develop, their demand for iron ore usually increases significantly.
Teacher's Tip: China is the giant when it comes to producing the iron that builds our world!
Exam Tip: Mentioning the "percentage production" for China and Australia shows you have done thorough research.

Question 3: Give any three uses of copper.

Answer:
Uses of copper are :
 Copper is mainly used in making electric and telephone wires.
 It is also used in making pipes and coins.
 Alloys such as brass and bronze are made using copper. Copper is an excellent conductor of electricity, which is why it is used in almost every electronic device in your home. It is also resistant to corrosion, making it perfect for water pipes that need to last for decades.
Teacher's Tip: Copper is the "Electric Messenger" because it carries power to all our gadgets!
Exam Tip: Include "electrical conductivity" as the scientific reason why copper is used for wiring.

Question 4: What are the two types of mining? Elaborate on the differences between the two.

Answer:
The two types of mining are:
1. Surface mining - It is the removal of top layer of soil and rocks, to extract the minerals lying underneath is called surface mining. Surface mining is done to extract minerals that are found close to the surface such as coal and some kinds of sedimentary rocks like limestone and mica. In surface mining, trees and other natural vegetation are destroyed.
2. Underground mining - It is the one in which a shaft is dug which is long, narrow passage and vertically deep into the ground and then people or heavy machinery is sent down, the tunnels are blasted using dynamite to extract the minerals, eg. gold, silver, etc. Underground mining causes sinking of the land, underground water pollution and surface water pollution, among other things.
Surface mining is visible from the sky as huge open pits, while underground mining happens secretly beneath our feet. Both methods are necessary but have different environmental impacts that must be carefully managed.
Teacher's Tip: Surface = Open-Air/Shallow; Underground = Deep Shafts/Blasting!
Exam Tip: Mention "Shaft mining" as a synonym for underground mining to show specialized vocabulary.

Question 5: Describe the importance of minerals.

Answer:
Minerals play an important role in our daily lives. A number of things of our daily use such as door knobs, latches, window grills, utensils, etc. are made of minerals. Iron and its alloy, steel, is used in making bridges, buildings, and wide range of machines and tools, which have made our life simpler and easier. Copper wires are used in our electrical and electronic gadgets. Copper tools and utensils are also widely used. Gold and silver are used in making our jewellery. Aluminium extracted from bauxite is used to make aero planes, our fastest means of transport. Mica is used in electrical goods and limestone is used as cement in constructing houses and buildings. Coal, petroleum and natural gas are important energy or power resources. Coal is used for various purposes like cooking, heating and producing electricity, and in various industries. Once petroleum is refined, we obtain different products such as petrol, diesel, kerosene, cooking gas, etc. Vehicles such as cars, trucks, trains, etc. run on petrol and diesel. Kerosene is used for cooking and other purposes. Products such as plastics and cosmetics are also made from petroleum. Natural gas is used as a fuel in cars, buses, etc. and hence are important for the agricultural sector as well. Without minerals, our modern civilization would essentially come to a halt as we wouldn't have power, transport, or tools. They are the hidden backbone of every industry and home across the globe.
Teacher's Tip: From the salt on your table to the car in your driveway, everything comes from minerals!
Exam Tip: Categorize your answer into "Construction," "Transportation," and "Energy" to make it organized.

Question 6: Why is it important to conserve minerals?

Answer:
Minerals are important for every country for its development and they need to be conserve because :
1. Minerals are non-renewable resources which once used can’t be obtained again as it takes thousands of years to form.
2. Workable minerals are in insufficient quantities (just $1 \%$ of the earth’s crust)
3. We are rapidly consuming mineral resources that requires millions of years to be renewed.
4. Industry and agriculture depend upon minerals and the substances manufacture from them. Because we are using them much faster than nature can replace them, we risk running out completely. Conservation ensures that future generations will still have the resources they need to survive and thrive.
Teacher's Tip: Conservation is "Smart Usage" today so we have resources for tomorrow!
Exam Tip: Always use the term "non-renewable" when explaining why conservation is essential.

F. Picture study.

Question 1: Which are the major producers of iron and steel in Asia?

Answer:
China produces almost $45$ per cent of the total world production of Iron and Steel. This massive production capacity makes China a global leader in construction and manufacturing. Other Asian countries like India and Japan are also significant contributors to the regional steel market.
Teacher's Tip: Asia is the "Steel Factory" of the entire world!
Exam Tip: Mentioning the specific figure of "$45\%$" for China makes your answer very accurate.

Question 2: Which states in the south of India produce a large quantity of iron and steel?

Answer:
Andhra Pradesh and Tamil Nadu are the major iron-producing states. These states have large reserves of iron ore and have developed sophisticated industrial zones to process them into steel. Their coastal location also helps in easily exporting these products to other countries.
Teacher's Tip: Southern India is the powerhouse of the country's metal industry!
Exam Tip: Be sure to correctly identify these as "South Indian" states to precisely answer the question.