Geography
- Which type of rainfall occurs in most of the world? Why? Orographic rainfall occurs in most parts of the world. Convectional rainfall is regional in nature. There is a certainty in the convectional... 2
- Comment on the rainfall occurring in the rain shadow area. The winds coming from lakes or seas are moisture-laden and they are obstructed by the high mountain ranges coming in their way They start go... 1
- In what ways does precipitation occur on the earth? Precipitation means water falls in the solid or liquid state from the clouds to the earth surface. Snow, hailstorms, rainfall are the major... 1
- Make a collage of pictures of land forms by collecting them from magazines and newspapers. Have a look src: https://www.pinterest.com/pin/203576845630168720/ 1
- Go to a river bank or a sea coast and observe the erosional, depositional and transportational work done by them Go to a river bank or a sea coast and observe the erosional, depositional and transportational work done by them https://www.youtube.com/wat... 1
- Name the types of moraines. The glaciers carry sediments with them. These sediments are called moraines. Depending ond the location of the deposits, moraines can be div... 1
- List the landforms that are produced by the depositional work of the sea waves The landforms like beaches, sand bar, lagoons are formed due to depositional work of the sea waves. (i) Beach: Large amount of sediments com... 1
- Which agent is responsible for the formation of stalactites and stalagmites and where are they formed? The work of groundwater is responsible for the formation of stalactites and stalagmites. In areas of limestone, the alkaline water seeps thr... 1
- List the landforms that are a result of the erosional work of the rivers. Gorges (canyons), V-shaped valleys and waterfalls are the result of the erosional work of the rivers. (i) ‘V’ Shaped Valley: A ‘V shaped val... 1
- Q 1. Rewrite the correct statement : (1) The temperature range helps the wind in its work. Question 1: Correct. Question 2 : Incorrect. Work of wind is more prominent in desert regions than other agents of erosion. Question 3 : Cor... 1
- See the given pictures. Observe the physical appearance of the rocks in each picture. You can see that rocks are broken At some places the day temperatures are very high and the night temperatures are very low. In the given pictures the rocks may have broken d... 1
- Identify the type of weathering from the given description. (a) Some animals live inside the grounds by making (a) Biological weathering (b) Chemical weathering (c) Mechanical weathering (d) Mechanical weathering (e) Mechanical weathering 1
- Complete the flowchart below. Weathering process Chemical weathering Exfoliation Oxidation Burrowing by animals Complete the flowchart below. Weathering process Chemical weathering Exfoliation Oxidation Burrowing by animals 2
- Write whether the statements are true or false. Correct the incorrect ones. (a) Climate affects earthquakes. Answer: False – Internal movements affect (leads to) earthquakes. (b) Mechanical weathering is less effecti... 1
- Distinguish between weathering and mass wasting. Weathering Breaking or weakening of rocks is called as weathering. Weathering is of three types – Mechanical, Chemical and Biological. Mass... 1
- How does biological weathering occur? The weathering caused by living organisms is called biological weathering It is the process by which rocks are broken into small fragments a... 1
- What are the main types of chemical weathering? The process of decomposition of rocks due to changes in their chemical composition is called chemical weathering. Its main types are: (i) Ca... 1
- What is mechanical weathering? The disintegration of rocks without any change in their chemical composition is called mechanical weathering. The minerals in the rocks expa... 1
- Explain the types of volcanoes on the basis of periodicity of eruption with examples. On the basis of periodicity of eruption, volcanoes are of three types: active, dormant and extinct. Active volcanoes: They erupt frequently... 1
- Explain the types of seismic waves. The seismic waves can be divided into primary, secondary and surface waves. Primary Seismic Waves reach first to the surface of the earth af... 1
- What are the effects of earthquakes on the earth’s surface and human life? Effects of earthquakes on the earth’s surface and human life are- Buildings collapse and loss of life and property. Communication system col... 1
- How is the magnitude of the earthquake-related to the collapse of houses High Magnitude creates high movement of the Earth Crust. Due to excessive vibration the houses on the earth crust collapse. 1
- Which type of movements have led to the formation of the major fold mountains in the world? Fold mountains are formed due to mountain-building (erogenic) movements. Energy is transferred from the interior of the Earth. Because of th... 1
- Give reasons why an earthquake occurs. When the movements occur in the interior of the Earth, tremendous tension is created in the Earth’s crust. When the tension goes beyond limi... 1