NCERT 6 TH AND 7 TH CLASS QUIZ FOR EXAM ASPIRANT
ANSWER THE FALLOWING QUESTION (1-5) (1) The southernmost Himalayas are known as (a) Shiwaliks (b) Himadri (c) Himachal (2) Sahyadris is also known as (a) Aravali (b) Western Ghats (c) Himadri (3) The Palk Strait lies between the countries (a) Sri Lanka and Maldives (b) India and Sri Lanka (c) India and Maldives (4) The Indian islands in the Arabian Sea are known as (a) Andaman and Nicobar Islands (b) Lakshadweep Islands (c) Maldives (5) The oldest mountain range in India is the (a) Aravali hills (b) Western ghats (c) Himalayas EXPLANATION(1-5) Q.1) Answer(a) The Shiwalik is the southernmost range.Him+alaya mean ‘the abode of snow’. The Himalayan mountains are divided into three main parallel ranges. The northernmost is the Great Himalaya or Himadri. The world’s highest peaks are located in this range. Middle Himalaya or Himachal lies to the south of Himadri. Many popular hill stations are situated here. The Shiwalik is the southernmost range. Q.2) Answer(b) The Western Ghats known as Sahyadris border the plateau in the west. While the Western Ghats are almost continuous, the Eastern Ghats are broken and uneven. The plateau is rich in minerals like coal and iron-ore. Q.3) Answer(b) Sri Lanka is separated from India by the Palk Strait. Q.4) Answer(b) Two groups of islands also form part of India. Lakshadweep Islands are located in the Arabian Sea.These are coral islands located off the coast of Kerala.The Andaman and the Nicobar Islands lie to the southeast of the Indian mainland in the Bay of Bengal. Q.5) Answer(a) Aravali hills is oldest mountain range in india.To the south of northern plains lies the Peninsular plateau. It is triangular in shape. The relief is highly uneven. This is a region with numerous hill ranges and valleys. Aravali hills, one of the oldest ranges of the world. ANSWER THE FALLOWING QUESTION(6-10) (6) India has an area of about (a) 3.28 million sq. km (b) 1.28 million sq. km (c) 2.28 million sq. km (d) 4.28 million sq. km (7) The Greater Himalayas are also known as (a) Kanchanjunga (b) Shivalik hills (c) Himadri (8) The largest state in India in terms of area is (a) Goa (b) Rajasthan (c) Gujrath (d) uttar pradesh (9) The river Narmada falls into the which sea. (a) Bay of bengal (b) Indian ocean (c) Arabian sea (d) south china sea (10) The world’s highest rainfall occurs in (a) Mumbai (b) Asansol (c) Mawsynram EXPLANATION(6-10) Q.6) Answer(a) India has an area of about 3.28 million sq. km. The north-south extent from Kashmir to Kanyakumari is about 3,200 km. And the east-west extent from Arunachal Pradesh to Kuchchh is about 2,900 km. Q.7) Answer(c) Great Himalaya known as Himadri. The world’s highest peaks are located in this range. The Himalayan mountains are divided into three main parallel ranges. The northernmost is the Great Himalaya or Himadri. The world’s highest peaks are located in this range. Middle Himalaya or Himachal lies to the south of Himadri. Many popular hill stations are situated here. The Shiwalik is the southernmost range. Q.8) Answer(b) Rajasthan is the largest state and Goa is the smallest state in terms of area. Q.9) Answer(c) The rivers Narmada and Tapi flow through these Vindhyas and the Satpuras ranges. These are west-flowing rivers that drain into the Arabian Sea. Q.10) Answer(c) Mawsynram in Meghalaya receives the world’s highest rainfall, while in a particular year it might not rain at all in Jaisalmer in Rajasthan. ANSWER THE FALLOWING QUESTION(11-15) (11) Mangrove forests can thrive in (a) saline water (b) fresh water (c) polluted water (12) Mahogany and rosewood trees are found in (a) mangrove forests (b) tropical deciduous forests (c) tropical evergreen forests (13) Wild goats and snow leopards are found in (a) Himalayan region (b) Peninsular region (c) Gir forests (14) During the south west monsoon period, the moisture laden winds blow from (a) land to sea (b) sea to land (c) plateau to plains (15) states of Andhra Pradesh and Tamil Nadu receive a great amount of rainfall during the season of (a) summer (b)autumn (c) spring EXPLANATION(11-15) Q.11) Answer(a) These forests can survive in saline water.They are found mainly in Sunderbans in West Bengal and in the Andaman and Nicobar Islands. Sundari is a well-known species of trees in mangrove forests after which Sunderbans have been named. Q.12) Answer(c) Tropical Rain Forests occur in the areas which receive heavy rainfall. They are so dense that sunlight doesn’t reach the ground.Important trees found in these forests are mahogany, ebony and rosewood. Andaman and Nicobar Islands, parts of North-Eastern states and a narrow strip of the Western slope of the Western Ghats are home of these forests. Q.13) Answer(a) Wild goats, snow leopards, bears, etc. are found in the Himalayan region. Besides these, many other animals are found in our country such as monkey, wolf, jackal, nilgai, cheetal, etc. Q.14) Answer(b) The winds blow from Arabian Sea and Bay of Bengal towards the land. They carry moisture with them. When these winds strike the mountain barriers, rainfall occurs. Q.15) Answer(b) In RETREATING MONSOONS Winds move back from the mainland to the Bay of Bengal. This is the season of the retreating monsoons. The southern parts of India, particularly Tamil Nadu and Andhra Pradesh receive rainfall in this season. ANSWER THE FALLOWING QUESTION(16-20) (16) Which is not a natural ecosystem? (a) Desert (b) Aquarium (c) Forest (17) Which is not a component of human environment? (a) Land (b) Religion (c) Community (18) Which is a human made environment? (a) Mountain (b) Sea (c) Road (19) Which is a threat to environment? (a) Growing plant (b) Growing population (c) Growing crops (20) Match the following. (1) Biosphere (a) blanket of air which surrounds the earth (2) Atmosphere (b) domain of water (3) Hydrosphere (c) gravitational force of the earth (4) Environment (d) our surroundings (e) narrow zone where land water and air interact (f) relation between the organisms and their surroundings EXPLANATION(16-20) Q.16) Answer(b) Land, water, air, plants and animals comprise the natural environment. It consist of lithosphere, hydrosphere, atmosphere and biosphere Lithosphere is the solid crust or the hard top layer of the earth. It is made up of rocks and minerals and covered by a thin layer of soil. It is an irregular surface with various landforms such as mountains, plateaus, plains, valleys, etc. Landforms are found over the continents and also on the ocean floors. Lithosphere is the domain that provides us forests, grasslands for grazing, land for agriculture and human settlements. It is also a source of mineral wealth. The domain of water is referred to as hydrosphere. It comprises various sources of water and different types of water bodies like rivers, lakes, seas, oceans, etc. It is essential for all living organisms. Plant and animal kingdom together make biosphere or the living world. It is a narrow zone of the earth where land, water and air interact with each other to support life. Q.17) Answer(a) Human beings interact with the environment and modify it according to their need. Early humans adapted themselves to the natural surroundings. They led a simple life and fulfilled their requirements from the nature around them.ex.Individual, Family, Community, Religion, Educational, Economic, etc Q.18) Answer(c) Lithosphere is the domain that provides us forests, grasslands for grazing, land for agriculture and human settlements. It is also a source of mineral wealth. The domain of water is referred to as hydrosphere. It comprises various sources of water and different types of water bodies like rivers, lakes, seas, oceans, etc. It is essential for all living organisms. Q.19) Answer(b) Growing population. Q.20) Answer(1-e, 2-a, 3-b, 4-d) Biosphere - narrow zone where land water and air interact Plant and animal kingdom together make biosphere or the living world. It is a narrow zone of the earth where land, water and air interact with each other to support life. Atmosphere - blanket of air which surrounds the earth The atmosphere is the thin layer of air that surrounds the earth. The gravitational force of the earth holds the atmosphere around it. It protects us from the harmful rays and scorching heat of the sun. It consists of a number of gases, dust and water vapour. The changes in the atmosphere produce changes in the weather and climate. Hydrosphere - domain of water The domain of water is referred to as hydrosphere. It comprises various sources of water and different types of water bodies like rivers, lakes, seas, oceans, etc. It is essential for all living organisms. Environment - our surroundings the natural environment refers to both biotic and abiotic conditions existing on the earth ANSWER THE FALLOWING QUESTION(21-25) (21) The rock which is made up of molten magma is (a) Igneous (b) Sedimentary (c) Metamorphic (22) The innermost layer of the earth is (a) Crust (b) Core (c) Mantle (23) Gold, petroleum and coal are examples of (a) Rocks (b) Minerals (c) Fossils (24) Rocks which contain fossils are (a) Sedimentary rocks (b) Metamorphic rocks (c) Igneous rocks (25) The thinnest layer of the earth is (a) Crust (b) Mantle (c) Core EXPLANATION(21-25) Q.21) Answer(a) When the molten magma cools, it becomes solid. Rocks thus formed are called igneous rocks. They are also called primary rocks. Q.22) Answer(b) The innermost layer is the core with a radius of about 3500 km. It is mainly made up of nickel and iron and is called nife (ni – nickel and fe – ferrous i.e. iron). The central core has very high temperature and pressure. Q.23) Answer(b) Rocks are made up of different minerals. Minerals are naturally occurring substances which have certain physical properties and definite chemical composition. Minerals are very important to humankind. Some are used as fuels. For example, coal, natural gas and petroleum. They are also used in industries – iron, aluminium, gold, uranium, etc, in medicine, in fertilisers, etc. Q.24) Answer(a) Rocks roll down, crack, and hit each other and are broken down into small fragments. These smaller particles are called sediments. These sediments are transported and deposited by wind, water, etc. These loose sediments are compressed and hardened to form layers of rocks. These types of rocks are called sedimentary rocks. For example, sandstone is made from grains of sand. These rocks may also contain fossils of plants, animals and other microorganisms that once lived on them. Q.25) Answer(a) The uppermost layer over the earth’s surface is called the crust. It is the thinnest of all the layers. It is about 35 km. on the continental masses and only 5 km. on the ocean floors. The main mineral constituents of the continental mass are silica and alumina. It is thus called sial (si-silica and al-alumina). The oceanic crust mainly consists of silica and magnesium; it is therefore called sima (si-silica and ma-magnesium) |