Question 1 What are biochemical cycles? Question 2 Give diagrammatic representation of water cycle? Question 3 What is water cycle? Question 4 Explain water cycle? Biochemical cycles The abiotic and biotic component of biosphere constantly interact with each other to form a dynamic but stable system.These interactions consist of a transfer of matter and energy … [Read more...] about Water cycle
Class 9
Atmosphere
Question 1 Define the term environment? Question 2 What are biotic components? Question 3 What are abiotic components? Question 4 Define the term atmosphere? Question 5 Name the 5 layers of atmosphere? Question 6 What is biosphere? Question 7 What is hydrosphere? Question 8 What is lithosphere? Natural resources Life on earth is due to ambient … [Read more...] about Atmosphere
Reverberation
Question 1 Define the term reverberation? Question 2 What is a megaphone.Name the principle on which a megaphone work? Question 3 What is a stethoscope.Name the principle on which a stethoscope work? Question 4 What is a soundboard.Name the principle on which a soundboard work? Question 5 Why are the ceiling of concert halls made curved? Question 6 How can we … [Read more...] about Reverberation
Reflection of sound
Question 1 What is meant by reflection of sound? Question 2 What type of surfaces are best for reflecting sound? Question 3 State the laws of reflection? Question 4 Define the term echo? Question 5 Why an echo is heard sooner on a hot day? Reflection of Sound Sound can also be made to change its direction and bounce back when it falls on a hard surface. The … [Read more...] about Reflection of sound
Carbon cycle
Question 1 Describe how carbon is cycled in the environment? Question 2 How carbon exist in combined form? Question 3 Draw carbon cycle? Carbon Cycle Elemental form of carbon is diamond and graphite. Combined form of carbon is (1) Carbondioxide in atmosphere carbonates (2) Carbonates and hydrogen carbon salts in minerals (3) Carbon containing molecules like … [Read more...] about Carbon cycle
Nitrogen cycle
Question 1 What is ammonification? Question 2 What is nitrification? Question 3 What is denitrification? Question 4 Draw nitrogen cycle? Question 5 Name a nitrogen fixing bacteria of non-leguminous plants? Question 6 Define nitrogen fixation? Question 7 Explain nitrogen cycle? Nitrogen Cycle 78% of our atmosphere is nitrogen. Nitrogen is a part of many … [Read more...] about Nitrogen cycle
Human ear
Question 1 Name that part of ear which vibrates when outside sound falls on it? Question 2 Name the tiny bones present in middle part of ear? Question 3 What is the function of tiny bones in the middle ear? Question 4 Name the tube which connects the middle ear to throat? Question 5 Explain the working of ear? Question 6 Name the nerve which carries electrical … [Read more...] about Human ear
Sound
Question 1 Define sound? Question 2 What type of wave are sound wave in air? Question 3 Name two types of sound waves which are generated in a long spring? Question 4 What are mechanical waves? Question 5 Explain the term compression? Question 6 Explain the term rarefaction? Sound Sound is a form of energy .It is that form of energy which makes us hear. … [Read more...] about Sound
Work
Question 1 Calculate the work done in lifting 200kg of water through a vertical height of 6 m? Question 2 Define the term work? Question 3 What is the S.I. unit of work? Question 4 Is work a scalar or a vector quantity? Question 5 Define 1 joule of work? Question 6 What are the quantities on which the amount of work depends? Question 7 What is the condition … [Read more...] about Work