CBSE ADDA

CTET Result 2011 - CBSE to Announce Today   ! According to the official website, the  CTET result 2011  will be declared by July 26 and the certificates and marksheet will be dispatched by August 26, 2011. It is expected that the CTET 2011 result is expected to be published online either at 12.00 PM or 4.00 PM.  To Check your CTET Result 2011 announced by CBSE on 26 July!   click here .

Physical Change A physical change is one in which the shape, size, appearance or state, of a substance may alter, but its chemical composition remains same. No new substance is formed. It is usually a change, which is reversible. By reversing the process, the original substance can be obtained.   For e.g., by using a piece of gold, a goldsmith can make a large variety of ornaments. But all of them consist of the same substance, namely gold. A more common example is that of water, which can be converted into solid ice, liquid water, and gaseous water vapor. It can be reconverted to its previous state by various methods. Yet, in all the three forms, the chemical composition of water is not altered. No new substance with new chemical properties is formed. In all these, water consists of two atoms of hydrogen and one atom of oxygen. Chemical Change   A change in which the composition of a substance is altered is called as chemical change. As a result, the original properties get

SUBJECT – SCIENCE CLASS – VII Marks: 100 Time: 2:30 Hrs INSTRUCTIONS: 1. All questions are to be attempted 2. All questions of section A carries 1 mark each, section B carries 2 marks each, section C carries 3 marks each and section D carries 5 marks each.              SECTION – A [I] Answer in one word / name the following: – (1 x 10 = 10) 1. Insect eating plants. 2. Parts of black sheep which gives wool. 3. Two regions of the earth with extreme climatic conditions. 4. Acid found in spinach. 5. Best top soil for growing plants. 6. The average weather taken over a long time. 7. Any natural indicator. 8. Rotting dead matter in the soil. 9. Two methods by which rusting of iron can be prevented 10. A dark funnel shaped cloud that reaches from the sky to the ground. [II] Fill in the blanks: (1 x 5 = 5) 1. HCL + NAOH =_________ + __________ 2. The lion tailed macaque (Beard ape) is found in rain forests of ___________ Ghats. 3. Wind is _____________ air. 4. High speed winds acco

Weather describes the condition of the atmosphere. It might be sunny, hot, windy or cloudy, raining or snowing. The weather depends on the temperature, precipitation, humidity and atmospheric pressure of the part of atmosphere (air) closest to the surface of the earth. The weather is constantly changing as temperature and humidity change in the atmosphere. Climate is the average weather conditions - temperature, pressure, precipitation and humidity - expected for a certain place. Climate is based on the average weather experienced over 30 years or more. Meteorology: The science of monitoring and studying the atmosphere and predicting its weather and climate is called meteorology. Meteorologists: People who study the weather and climate are known as meteorologists. There are basically 6 factors affecting India's climate. 1) LATITUDE - Due to the curvature of the Earth, the amount of solar energy received is different according to the latitudes. 2) ALTITUDE - A