Soil is a mixture of sand, small rock particles and humus. The sand and small rock particles are formed by physical, chemical and biological weathering of rocks. The humus is formed by humification of dead organic matters. The process of soil formation is called pedogenesis. The study of soil and its properties is called pedology.
SOIL Class 7 Chapter 9 Read More »
Living organisms have a limited lifespan. Unless they are not going to form new organism, they will finish. Their continuity of life will be lost. So, fertile organisms form new organism of same kind either by self or by the help of other individual of same species. The process of formation of similar types of organisms by existing organism is called reproduction.
There are two types of reproductions-
(a) Asexual Reproduction – New organism is formed by single parent. It is common in plants and animals.
(b) Sexual Reproduction- New organism is formed by two parents. It is common in plants and animals.
REPRODUCTION IN PANTS Class 7 Chapter 12 Read More »
MCQs Select the best correct option among the following. Flowering and Non-flowering Plants 1. Amarbel is an example of (a)Autotroph (b)Parasite (c) Saprotroph (d) Host 2. The plant which traps and feeds on insects is- (a)Cuscuta (b) China rose (c) Pitcher plant (d) Rose 3. Which part of the plant
M.C.Qs. NUTRITION IN PLANTS Part -II Class VII Chapter 1 Read More »
The blowing air is called as wind. Storms are the very high speed winds. When thunder and lightning occurs with storms, it is called as thunderstorm. Cyclone is a very high speed wind revolving around a low air pressure system. The central low air pressure system is called as ‘eye of cyclone’.
WINDS, STORMS AND CYCLONES Class 7 Chapter 8 Read More »
LEARNING OBJECTIVES– Knowledge of acids and bases, Knowledge of natural and synthetic acid base indicators, Demonstration of working of indicators, Understanding of neutralization reactions and salt formation, Applications of neutralization reaction in everyday life. ACIDS–(Gr. Acere= sour) -The taste of acids is sour. They turn the blue litmus paper into red. Their pH (Potential of
ACIDS, BASES AND SALTS Class VII Chapter 5 Read More »
LEARNING OBJECTIVES- Knowledge of heat, temperature, thermometer and reading of temperature on thermometer, Differences between clinical and laboratory thermometers, Methods of transfer of heat – conduction convection and radiation, Understanding why woolen clothes are preferred in winter?, Understanding why white or light coloured cotton clothes are weared in summer?, why the base of utensils are
HEAT Class- VII Chapter 4 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 »