9th
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- 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
- Distinguish between Earthquakes and volcanoes Earthquakes Volcanoes (i) Earthquake is the movement of the Earth’s crust. A volcano is an opening in the Earth’s crust from which hot solid... 1
- Distinguish between Primary and Secondary Seismic Waves Primary Seismic Waves Secondary Seismic Waves Primary Seismic Waves reach first to the surface of the earth after the energy is emitted in t... 1
- Distinguish between Block Mountain and Fold Mountain Block Mountain Fold Mountain Block Mountain is created due to Tension. Fold mountain is created due to compression. Here horizontal waves of... 1
- Volcanic eruptions can cause earthquakes. Generally, the movements in the Earth’s interior occur in the upper layer of the mantle Tremendous energy is released by radioactive materia... 1
- The Barren Island is becoming conical in shape. Barren island which was considered a dormant volcano has become active since February 2017. Mainly dust, smoke and mud are coming out of thi... 1
- Most of the volcanoes are found on the plate boundaries. The plate boundaries are directly related to the areas of volcanoes. Most of the volcanoes are located on the plate boundaries. The part of... 1
- There is a difference in the formation of the Meghalaya Plateau and the Deccan Plateau. Meghalaya Plateau is the example of Block Mountain which had formed because of internal movements where horizontal waves moving away from ea... 1
- Buildings collapsed at the foothills of the Himalayas because of an earthquake. Before collapsing they were moving The seismic waves can be divided into primary, secondary and surface waves. The primary waves are the first ones to reach the surface of the... 1
- Which method will you use for the following information ? (1) Talukawise wheat production in the district . – Dot Method (2) Distribution of the altitude of the land in the district – Isopleth Metho... 1
- Explain with reasons the method which is best suited to show the distribution of population in a region. Dot method is the best suited method to show the distribution of population in a region. One can get the exact picture of the distribution o... 1
- Differentiate between choropleth and isopleths methods. Choropleth Method Isopleth Method (1) In Choropleth method maps, the distribution of various variables are shown by shading or using tints o... 1
- Explain the use and types of distributional maps. Use of distributional maps: The distributional maps are useful for explaining the patterns of distribution of a particular geographical vari... 1
- Inner surface of mouth Answer: Squamous epithelium (stratified squamous epithelium) The inner surface (lining) of the mouth is covered by squamous epithelial tissu... 1
- Tissue joining two bones Answer: Ligament A ligament is a connective tissue that joins one bone to another bone at a joint. It is made mostly of strong collagen fibr... 1
- Write the differences. Simple tissue and complex tissues in plants. Simple Tissue in plants Complex Tissues in plants (i) They are made up of only one type of cells. (i) They are made up of more than one type... 1
- Write the names of the following tissues. a. Tissue lining inner surface of mouth. b. Tissue joining muscles and bone a. Tissue lining inner surface of mouth. Answer: Squamous epithelium. b. Tissue joining muscles and bones. Answer: Tendon c. Tissue responsi... 1
- Identify the odd word and explain why it is odd. c. Cartilage, bone, tendon, cardiac muscle. Cardiac muscle is the odd one out because rest of the three are connective tissues while cardiac muscle is a type of muscular tissue. 1
- Identify the odd word and explain why it is odd. b. Epithelium, Muscle fibre, nerve fibre, epidermis. Epidermis is the odd one out because all the other are Permanent tissues. Epidermis is an outer layer of cells found in plants. 2
- Identify the odd word and explain why it is odd. a.Xylem, phloem, permanent tissue, meristematic tissue. Meristematic tissue is the odd one out because xylem and phloem are types of permanent tissues. 1
- Each of the following statements is wrong. Rewrite them correctly by changing either one or two words. a. Ciliated epithelium is present in respiratory tract. b. Cuboidal epithelium is present in kidneys. c. Aerenchyma helps the plant to float... 2