Subject :NSO Class : Class 9
Subject :NSO Class : Class 8
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Subject :NSO Class : Class 6
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Subject :NSO Class : Class 6
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Subject :NSO Class : Class 5
Ans 1:
Class : Class 8
Plants use sunlight, chlorophyll, carbondioxide and water to produce oxygen.When plants put them together a chemical reaction causes and oxygen is produced.
Ans 2:
Class : Class 7
Carbon Dioxide +Water (using sunlight and chlorophyll present in leaves)= starch+water vapour+ Oxygen
=
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Subject :NSO Class : Class 7
Ans 2:
Class : Class 8
Light is a form of energy which makes the things visible from which it is emitted or reflected or refracted. It travels at a speed of about 3*10^8
m/sec.
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Subject :NSO Class : Class 9
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Subject :NSO Class : Class 7
Ans 3:
Class : Class 8
CH3COOH(acetic acid) + HCO3(hydrogen carbonate) ---------- NaC2H3O2(sodium acetate)
+CO2
Ans 5:
Class : Class 8
if you mix acetic acid.....that is vinegar in hydrogen carbonate that is [again...;)] ....baking soda it releases carbon dioxide. It is used in mostly in flour doughs to give a rise as a substitute to yeast..............................................please like........
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Subject :NSO Class : Class 7
Ans 1:
Class : Class 7
Mercury is used in thermometers becuase it expands easily and does not stick to the sides of the thermometer.
Difference between clinical and lab thermometer-
The range of clinical thermo.is between 35 degree celsius to 42degree celsius whereas the range of lab. thermo. is between -10degree celsius to 110degree celsius.
CT are used to measure temp. of human body whereas LT is used to measure the temp. of objects other than the human body.
Ans 2:
Class : Class 10
Mercury is used in thermometers with a higher range, as its freezing and boiling points are -39c and 360c while alcohol is used in those needing to measure a lower range with -114c and 78c respectively.
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Subject :NSO Class : Class 7
Ans 2:
Class : Class 7
ingestion : the process of taking in food through mouth opening
digestion: is the process of breakdown of food into simple form with the help of digestive juices made in the body
absorption: is the process by which food in the simple form passes into body fluids such as blood
assimilation: is the process of using absorbed nutrients by the body cells for producing energy and for the growth of the body
egestion: is the process of removing waste matter from the body.