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Observing sun spots
Use the telescope that you made in a last experiment. Set it up so that it points directly at the sun and focus it so that a clear and bright image of the sun is formed on a piece of white cardboard placed a short distance from the eyepiece lens. If sun spots are there on the surface of the sun you may be able to observe them as small dark spaces of irregular outline on the image. Caution. Do not look at the sun by the telescope, unless your eyes are protected by a dark glass filter.
Making a 'gusher' with compressed air Secure a large narrow-necked bottle like as is used for soda water. Place a single-hole stopper in the bottle. By the stopper put a 10- cm
Define the Utilization of Glucose - Carbohydrates A constant blood glucose level is maintained so that all body tissues have a constant supply. Excess glucose is converted to g
Dating the Past: Today, that a particular rock is a million ycars old, or a fossil is 50 thousand ycars old. For instance, how do we estimate the duration of various geo
Explain the Functions of the Kidney The functions of the kidneys, as you already know, are to form urine and to pass urine for excretion, maintain water and electrolyte balance
Ecological Crises: The natural atmosphere which man has inherited from the past, with healthy and fresh air, shielding from excessive radiation of the sun, has been deteriorat
What are decomposers in a temperate deciduous forest? In the Deciduous Forest, many decomposers that are living there contain fungi, bacteria, and yes, even worms.
What is a hypothesis? Ans) A hypothesis is a postulation as to what could be the case; it is a suggestion as to something that precisely models and describes some aspect in re
Explain the Control of Salivary Secretion The autonomic control of saliva secretion occurs in two ways, as unconditioned and conditioned reflex. What are these? Let's find out.
The difference between weight and pressure Make two square blocks of wood, one much lesser than the other, and link them together as shown in the diagram. Press every of these
why there is 28 day in february month
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