akshata kirpekar

CHEMICAL REACTIONS AND EQUATIONS CLASS

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Can you recall? (Textbook page no. 30) 1. What are the types of molecules of elements and compounds? The molecules of an element are made of one or more atoms that are exactly alike whereas, the molecules of compound are made up of atoms of different types. 2. What is meant by valency of elements? … Read more

PERIODIC CLASSIFICATION OF ELEMENTS NOTES

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PERIODIC CLASSIFICATION OF ELEMENTS NOTES Basic concepts – Matter – It is anything around us which has mass and which occupy space States of matter: – Solid Liquid Gas Plasma state (Occurs at extremely high temperature – 11,000° – 14,500° Fahrenheit or 150 million degrees Celsius) Bose Einstein condensates (temperatures very close to absolute zero … Read more

LIFE PROCESSES IN LIVING ORGANISMS PART 1

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LIFE PROCESSES IN LIVING ORGANISMS PART 1 How are the food stuffs and their nutrient contents useful for body? The food stuffs are digested and converted into soluble nutrients. Carbohydrates & fats provide energy Proteins are the structural components of cells Vitamins & Minerals perform function of Protection and regulation. The nutrients are carried by … Read more

HEREDITY AND EVOLUTION EXERCISE QUESTIONS

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HEREDITY AND EVOLUTION EXERCISE QUESTIONS   Q.2 Read the following statements and justify a)   Human evolution began approximately 7 crore years ago. The last dinosaurs disappeared approximately 7 crore year ago due to changes in environmental conditions. Monkey like animals evolved from lemur – like ancestors 4 crore years ago – The tail of these … Read more

Life Processes 1 Test Answers

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Life Processes 1 Test Answers Q.1. (A) Choose and write the correct option:             (5 Marks) Water content of Blood Plasma is ……………… . 70% 90% 65% 50% In which part of cell, electron transfer chain reaction occurs? Cytoplasm Mitochondria Nucleus Golgi body Which of the following protein is present in skin? Haemoglobin Insulin Keratin Ossein … Read more

GRAVITATION EXERCISE QUESTIONS

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1. Study the entries in the following table and rewrite them putting the connected items in a single row. GRAVITATION EXERCISE QUESTIONS 2. Answer the following questions. a. What is the difference between mass and weight of an object. Will the mass and weight of an object on the earth be same as their values … Read more

Life Processes 1 Test.

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Life Processes 1 Test. Dear students, sharing with you Life Processes 1 Test. This will help you for preparing for board exam. Q.1. (A) Choose and write the correct option:             (5 Marks) Water content of Blood Plasma is ……………… . 70% 90% 65% 50% In which part of cell, electron transfer chain reaction occurs? Cytoplasm … Read more

  HREDITY AND EVOLUTION TEST ANSWERS

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HREDITY AND EVOLUTION TEST ANSWERS This will help you to prepare for your board exam. Q1. A Rewrite the statement by using correct option. ……. proposed a model for protein synthesis with the help of DNA in bacterial cells. Johann Gregor Mendel Walter and Sutton Francois Jacob and Jack Monad Hugo de Vries Information about … Read more

Gravitation Test Answers

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Gravitation Test Answers Total marks – 40                                                                  Time – 2 Hrs.   Q 1 (A) Choose the correct alternatives            (5 marks)    Gravitation Test Answers If the distance between two objects increases 5 times, the gravitational force becomes times. (a) 5 (b) 15 (c) 1/25 (d) 25 The gravitational force on the surface of the … Read more