Science illusions

                                                           1.TREE DIAGRAM                                                             2.WEB DIAGRAM                                                                                                                              3.SPIDER MAP                         ...

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                                                                    Soil                                                                      Database worksheet Aim of survey: To identify and classify the different type of soil found near your house . Format of the report Aim of the survey Introduction with purpose Method ...

FOREST Activity base 1 .Visit a forest or a park in your neighborhood. Observe the trees and try to identify them. You can take the help of some elders or book on trees .list the characteristics of the trees that you observe, such as the height, shape of leaves crown, flower, and fruits. Also draw the crown trees 2 .Dig a small pit. Put vegetable waste and leaves in it. Cover them with soil. Add some water. After three days, remove the upper layer of the soil. Does the pit feel warm inside?

Worksheet no.5 DISTINGUISH BETWEEN                ACID                       BASE Acid turns blue litmus paper red   Bases turns red litmus blue Acids are sour in taste   Bases are bitter intaste Acids shows pH less than 7   Bases shows pH more than 7 Acids give H+ ions Bases gives OH- ions Ex-HCL, Lemon , Ex-magnesium hydroxide, NAOH

Worksheet no 4 True or false State whether true of false . 1)    Nitric acid turns red litmus paper blue. 2)    Sodium hydroxide turns blue litmus paper red. 3)    Indicator is a substance which shows different colours   in acidic and basic solution .   4)If an indicator changes colour with a base ,it does not change colour with an acid.   5)Change of colour in an acid and a base depends on the type of the indicator

Worksheet no .3 MATCH THE PAIRS              ACIDS AND BASES                          FOUND IN                    Acetic acid                             Spinach              Magnesium hydroxide                           Lime water                 ...

Worksheet No.2      Questioning 1).     State the differences between acids and bases 2).    An antacid tablet is taken when you suffer        from acidity. Why? 3).     Describe the process of neutralisation with the help of an example 4).      Why Calamine solution is applied on the skin when an ant bites? 5).     Factory waste is neutralised before disposing it into the water bodies. Why?

Acids, Bases and Salts Worksheet NO.1 Choose the best correct option from the following options 1) Which among this is not a natural indicator?     a) Litmus     b)Turmeric     c)Phenolphthalein     d)China Rose     2) Acids are _______ in taste   a)sour   b)Sweet   c)Salty   d)Bitter 3) Bases are _______ in taste     a)Sour     b)Sweet     c)Salty     d)Bitter 4)The rain become acidic because of ________     a)Nitrogen     b)Hydrogen     c)Carbondioxide     d)Oxygen 5) Litmus is extracted from ________    a)Frogs    b)Kactus    c)Hydra    d)Lichens