Class name Subject Book title Chapter number Content Created at
Class VII Science Curiosity 4 and guitar. d r This property of materials by which they can be drawn into | wires is called ductility. e n This property of ductility is mainly po...
Class VII Science Curiosity 4 Iron Pillar (Delhi) C Reprint 2026-27 51 4.3 Effect of Air and Water on Other Metals a e - Acti iy 4. :Letu sinve stga t (dem o nstrati na ctiity) n...
Class VII Science Curiosity 4 sonorous in nature. Oh! The ringing sound Now, I understand! The ringing sound of my ghungroos of the school bell is is also due to the sonority of...
Class VII Science Curiosity 4 In such cases, the transfer of heat from one point to another o of a material is called conduction, and materials that transfer l heat are called c...
Class VII Science Curiosity 4 could not make it glow. Do you see any pattern in the glowing of bulbs when using different materials in Activity 4.4? It is observed that all the ...
Class VII Science Curiosity 4 them A, B, and C. e Silica gel M  Takethreeironnailsandtieeachironnailwithathread. Fig. 4.4(a) o  Place one iron nail and some silica gel in the ...
Class VII Science Curiosity 4 nails do not develop when the iron nail is kept in dry air alone (bottle A) or water alone (bottle B). However, in glass bottle C, the ironnailshow...
Class VII Science Curiosity 4 lot of heat is generated in the reaction. Storing sodium in kerosene prevents its exposure to moisture and air. Can you predict the nature of its o...
Class VII Science Curiosity 4  What do you observe? C Fig. 4.7(c): Burning of sulfur Reprint 2026-27 53 Blue litmus You would observe that it is acidic in paper nature (Fig. 4....
Class VII Science Curiosity 4 Non-metals Essential in Everyday Life? You often observe many metals in your day-to-day lives because of their distinct properties, such as their l...
Class VII Science Curiosity 4 produce metal oxides which are b basic in nature. x T  Non-metals react with oxygen to produce oxides which are | acidic in nature. t s  Generall...
Class VII Science Curiosity 4 Most malleable and ductile (b) N E C O H I R L (iii) Living organisms cannot survive without i(c) P E P O R C (iv) Plantsgrow healthy when fertilis...
Class VII Science Curiosity 4 states where iron, gold, T | aluminium and other metals are found. i Technology Economy  Explore the metals and non-metals found in smartphones o ...
Class VII Science Curiosity 5 ChangesAroundUs: PhysicalandChemical I placed a cube of ice here half an hour ago. It has now become water! A bud that I saw yesterday on this rose...
Class VII Science Curiosity 5 paper s and fold them to create h : new objects (Fig. 5.1). U  Do you get the same paper d u back when you unfold r these objects? A e B. Playing ...
Class VII Science Curiosity 5 water.  Now, blow air (exhale) into each glass tumbler, one at a time, using separate straws (Fig. 5.2) and observe them. Caution —Do not suck the...
Class VII Science Curiosity 5 Let us experiment a l  Take a teaspoonful of vinegar or lemon juice in a test tube. i y  Add a pinch of baking soda (sodium hydrogen carbonate) h...
Class VII Science Curiosity 5 or a chemical change? When the magnesium ribbon is burnt, a new substance, magnesium oxide, is formed. So, the burning of magnesium ribbon also inv...
Class VII Science Curiosity 5 y of carbon dioxide gas? P You can test the carbon dioxide gas by adding a small amount s U of lime water in the petri dish. You will notice that i...
Class VII Science Curiosity 5 sunrays to make the smallest and brightest spot on the paper, as shown in the Fig. 5.7a. Hold it there for some time. What do you observe? Fig. 5.7...
Class VII Science Curiosity 5 What changes occur when a candle burns? The wax of the candle melts, is carried up the wick, and evaporates due to the heat of the flame. The vapour...
Class VII Science Curiosity 5 However, some changes cannot be reversed since we i S cannot get the original object or substance back after the change. f For example, chopped veg...
Class VII Science Curiosity 5 in water, can also react with the rocks and cause chemical changes in their composition. An example of such a chemical change is shown in Fig. 5.10...
Class VII Science Curiosity 5  The lowest temperature at which a substance can catch fire G is called its ignition temperature. | c  Some changes can be reversed and some canno...
Class VII Science Curiosity 5 WH N (True/False) I G WHOSE C (ii) Collecting water vapour by condensing involves a H chemical change. (True/False) W E WHAT WILL A S (iii) The pro...