9th
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- If condensation occurs closer to the earth’s surface, what types of forms become visible? If condensation and solidification of the water vapour in the atmosphere closer to the earth surface are visible, they are in the form of fo... 1
- 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
- Take 5 examples from your surroundings and give explanation based on Newton's law of motion 1) When a ball is kicked in space, the ball keeps moving in one direction as there is no gravity. The ball stops when it hits an object or p... 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 tha disorders -Abinism Answer: Albinism is a hereditary (genetic) disorder in which the body cannot produce the pigment melanin, so the skin, hair and eyes lack no... 1
- Slim person feel more cold in winter the fat persons. Answer: Fat persons have a thicker layer of fat (adipose tissue) under the skin, which acts as an insulator and reduces heat loss. Slim pers... 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