The dark coloured patch formed on the screen opposite to the light by an opaque object is called shadow. For the formation of a shadow, a source of light, an opaque object and a screen are required. Shadow is formed by an opaque object when light falls on it. Its size and shape change according […]
PISA (C.C.T.) Type Questions Topic-Shadow Class VI Total Marks=8 Read More »
Electric current is used to generate heat by ‘ heating element’ based electric appliances like- heater, electric bulb, hair dryer, immersion rod for heating water, toaster, electric press, glue gun, hair straighter, electric tea kettles, electric girdle, clothes dryers, fridge defrostrator etc. All these appliances work on principle of heating effect of current. The amount
PISA TOPIC- HEATING EFFECT OF CURRENT AND COMMON HEATING ELEMENTS Read More »
71 % of 71 % of the Earth is covered with water. This water is present in oceans, rivers, lakes, ice caps, glaciers, ground water and in the atmosphere. The water on the earth can be categorized into-Fresh water (2.5%) and saline or salty water (97.5%). The saline water is found in the oceans, sea,
PISA TOPIC: WATER- A PRECIOUS VITAL RESOURCE Read More »
Q.1 What the organisms which prepare food by their own are called as? (a) Autotrophs (b) Heterotrophs (c) Saprotrophs (d) Insectivores Q.2 “Chlorophylls’ are the green pigments found in leaves. What is the function of chlorophylls? (a) Absorption of carbon dioxide gas (b) Releasing of oxygen (c) Formation of carbohydrate (d) Absorption of
M.C.Qs Nutrition In Plants Part-I Chapter 1 Class VII , C.B.S.E. Read More »
Objectives– Introduction; Symbols of Electric components in a circuit; Heating effect of current; Magnetic effect of current; Electromagnet; Electric bell Introduction– When we rub our dried hairs with a plastic ruler scale or comb and then bring this comb immediately near some small bits of paper, it starts attracting them. Why this happens so?
ELECTRIC CURRENT AND IT’S EFFECTS Class VII Chapter 14 Read More »
FIBRE TO FABRIC Class 7 Chapter 3 (C.B.S.E.) Introduction-The very thin strands of the thread is called fibre. Fibres are soft and they can be spun to form yarn or thread. The yarns are then woven to form the fabric i.e. clothes. The fibres are obtained from plants as well as from animals. Plant fibres
FIBRE TO FABRIC Class VII Chapter III (C.B.S.E.) Read More »
The change of place with respect to time is called motion.
MOTION AND TIME Chapter 13 Class 7 (C.B.S.E.) Read More »