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 Chapter 5 The Fundamental Unit of Life Here is the answer of chapter 5  The Fundamental Unit of Life of NCERT science of class 9.The complete solution of CHAPTER 5 The Fundamental Unit of Life  is given here which is prepared subject expert. Block Questions.(page no.- 59) Ques 1. Who discovered cell and how? Ans. Robert Hooke discovered the cell. He observed the cell in a cork slice with the help of a primitive microscope. Ques 2. Why is cell called the structural unit of life? Ans. Cell constitute various component of plants and animals a cell is the smallest unit of life and is capable of all living functions. Cell are the building blocks of life. This is the reason why cell are referred to as the basic structural and functional unit of life. All cells varies in shape and size and activity they perform in fact, the shape and size of a cell is related to the specific functions they perform. Block Questions Page no- 61 Ques 1.How do substance like CO2 and water move in and out of the

 Chapter 16 Light Here is the answer of chapter 16 LIGHT of NCERT science of class 8.The complete solution of CHAPTER 16 LIGHT is given here which is prepared subject expert. Some important extra questions and important points about Chapter 16 are also given. Ques1:-Suppose you are in a dark room can you see object in the room? Can you see object outside the room.Explain. Ans 1.  When we are in a dark room, we cannot see the object in the room because there is no light being reflected by the object.However, we can see the object outside the room because they reflect light falling on them. Ques2:-Differentiate between regular and diffused reflection does diffused reflection mean the failure of the law of reflection. Ans 2. In regular reflection, all the  rays that are   reflected from the surface are parallel to each other. In diffused reflection the reflected light   consists of rays that are not parallel to each other. Diffused reflection does not mean the failure of the law of reflec

 CHAPTER 17 STARS AND THE SOLAR SYSTEM Here is the answer of chapter 17 STARS AND THE SOLAR SYSTEM of NCERT science of class 8.The complete solution of CHAPTER 17 STARS AND THE SOLAR SYSTEM is given here which is prepared subject expert. Some important extra questions and important points about Chapter 17 are also given. Ques 1. Why does  phases of the moon occur? Ans. We can see the moon due to the reflection of sunlight incident on it towards us. Hence, we  can see only the part of the moon  that reflects light towards us. As the position of the moon changes from day to day. Sunlight portion of the moon facing the earth changes  too and this cause the phases of moon. Ques 2. In which part of the sky can you find venus if it is visible as a evening  star? Ans. We can find venus in the western part of the sky after sunset as an evening star. Ques 3. Name the largest planet of the solar system? Ans. Jupiter is the largest planet in the solar system. Ques 4. What is constellation? Name a