INTRODUCTION OF FORCE- In our daily life we do a number of activities. These activities include push and pull of anything. Lifting, picking, throwing, pushing, striking, flicking, stopping, hoisting, shutting, opening, hitting, lowering, flying, Sliding, smashing etc. activities include push or pull. A push or pull acting on an object is known as force. […]
FORCE AND PRESSURE Class VIII Chapter 11 C.B.S.E. Read More »
Plastic is a boon as well as a curse. It all depends how and for what purpose the plastic materials are used. Plastic is non-reactive to chemicals like acid, base and salts. Plastic is lightweight and cost-effective. It is very strong and insulator of heat and current. The raw material for preparing plastic is petrochemicals.
PISA,C.C.T. Questions On Plastic and Plastic Pollution Read More »
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 »
Q.1 What is/are true about micro-organisms? (a) They may survive in extreme conditions like +78 degree centigrade to -90 degree centigrade. (b) They may be round, cylindrical, oval, rectangular or variable in shape. (c) They are found in all the places of biosphere. (d) All of the above are true. Q.2 Which of the following
M.C.Qs Microorganisms: Friends or Foe? Class VIII Chapter 2 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 is the practice of sowing seeds at random by hand is called? (a) Spreading (b) Dissemination (c) Broadcasting (d) Transplantation Q.2 Which among these is used for levelling of ploughed field? (a) Plough (b) Hoe (c) Cultivator (d) Leveller Q.3 Which among these is/are organic manure? (a) Compost (b) Green manure (c) Farmyard
M.C.Qs Crop Production and Management Chapter 1 Class VIII, C.B.S.E. Read More »