Subject :NSO Class : Class 7
Subject :NSO Class : Class 5
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Subject :NSO Class : Class 3
Ans 1: (Master Answer)
Class : Class 1
Containers P & Q have hot water, R has cold water and S has ice.
To show that water expands when heated - When water in the container Q is heated, it also heats up the water inside the conical flasks in Q. The water in conical flask thus expands and a rise in the level can be seen in the calibrated tube attached to the funnel (Image Q).
To show that water contracts when cooled - When water in container S is cooled, it contracts. Due to contraction the water in conical flask thus shows a fall in the level of water in the calibrated tube attached to the funnel. (Image S)
So, the right answer is Option B.
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Subject :NSO Class : Class 4
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Subject :NSO Class : Class 4
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Subject :NSO Class : Class 8
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Subject :NSO Class : Class 5
Ans 8:
Class : Class 5
when salt is added to water its density increases greatly.therefore it is very tough to push the plunger.
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Subject :NSO Class : Class 4
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Subject :NSO Class : Class 4
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Subject :NSO Class : Class 2
Ans 1:
Class : Class 9
Photosynthesis is the process by which plants and some protistans use the energy of the Sun to produce sugar, which cellular respiration converts into ATP, the "fuel" used by all living things. The conversion of unusable sunlight is associated with a green pigment called chlorophyll.
Julius Von Sachs(1832-1897) , a German botanist and physiologist initiated experimental plant physiology to study in the effects of light and heat on plants and how plants get their food. In 1854, Sachs showed that plants produce sugar with the help of a green pigment called chlorophyll. Sachs also showed that chlorophyll is not spread throughout the plant, instead it is present only on the leaves. Which is why leaves are green in color.