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 MoreCategory: 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…
Read MoreReverberation
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?…
Read MoreReflection 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…
Read MoreCarbon 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 proteins,carbohydrates,fats,nucleic acid,vitamins.…
Read MoreNitrogen 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 MoreHuman 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…
Read MoreSound
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…
Read MoreWork
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…
Read MoreSignificance of health
Question 1 What is health? Question 2 What is a disease? Question 3 State the conditions essential for good health? Why do we fall ill Cells are fundamental units of living organism.They are made up of variety of chemical substances.Cells moves from place to place.Even if cell is not moving,in it repairing may go on.…
Read MoreDiversity in living organism
Question 1 What is classification? Question 2 Define the term taxonomy? Question 3 What is the importance of classification? Question 4 Define the term genus? Question 5 Define the term species? Question 6 Enlist kingdoms of hierarchy of classification? Diversity in living organism The method of arranging organism into groups or sets on the basis…
Read MoreNervous tissue
Question 1 What are the function of nervous tissue? Question 2 Define the term neuron? Question 3 Explain the structure of nerve cell? Nervous Tissue They are highly specialised for being stimulated and then transmitting the stimulus very rapidly from one place to another. Brain,spinal cord,nerves are made up of nervous tissue. Nervous tissue contain…
Read MoreConnective tissue
Question 1 Define connective tissue? Question 2 Enumerate various cells of connective tissue? Question 3 What are tendons? Question 4 What are ligaments? Question 5 What are cartilage? Question 6 What are the functions of blood? Question 7 What are the functions of areolar tissues? Question 8 What is the function of adipose tissue? Connective…
Read MoreMuscular tissue
Question 1 Name the protein present in muscle fibre?What is its function? Question 2 Why striated muscles are called as voluntary muscles? Question 3 What are the functions of striated muscles? Question 4 What are the functions of smooth muscles? Question 5 What are the functions of cardiac muscles? Question 6 What is the location of…
Read MoreTissue
Question 1 What is a tissue? Question 2 Write the different types of tissue in plants? Question 3 Name three types of simple tissue of plants? Question 4 Name two types of permanent tissue of plants? Tissue A group of cells similar in structure that work together to perform a particular function forms a tissue.…
Read MoreVacuoles
Question 1 What are vacuoles? Question 2 Explain the function of vacuoles? Vacuoles They are storage sacs for solid or liquid content.In animals cell,they are small and temporary.They store water,glycogen and proteins,single membrane maintain water balance. In plant cell they are large distinct and permanent.The vacuole is bounded by a membrane called Tonoplast. It is filled…
Read MoreFundamental units of life
Question 1 What is a cell? Question 2 What are unicellular organism.Give example? Question 3 What are multi cellular organism.Give example? Question 4 Who discovered cell? Fundamental Units Of life Robert Hooke in 1665 discovered cell.He examined a thin slice of cork(substance which comes from bark of a tree)and found that cork resembled structure of…
Read MoreGravitation
Question 1 State the universal law of gravitation? Question 2 Define gravitation constant? Question 3 What is the value of G on earth and on the moon? Question 4 Which force is responsible for the moon revolving round the earth? Question 5 Describe how the gravitational force between two objects depends on the distance between…
Read More