Complete Explanation of CBSE Notes
CBSE Stars and the Solar System Class 8 Extra Questions In the night sky there are moon, stars, planets and other celestial objects The phases of moon occur, because we are able to see only that part of the moon which reflects the light of the sun towards us Stars emit their own light. Sun …
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CBSE Light Class 8 Extra Questions Light from an object enters our eyes then we see the objects around us Light is reflected from all surfaces Regular reflection takes place when light is incident on smooth, polished and regular surfaces Irregular reflection takes place from rough surfaces. Please refer Light Class 8 Extra Questions for …
CBSE Some Natural Phenomena Class 8 Extra Questions There are two types of charges namely positive and negative charge, like charges repel each other and opposite charges attract each other Some objects get charged by rubbing with other objects, the electrical charges produced by rubbing are called static charge Lightning in sky is caused by …
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CBSE Chemical Effects of Electric Current Class 8 Extra Questions Materials which allow electric current to pass through them are good conductors of electricity and which does not allow electric current to pass through them are good conductors of electricity We should not experiment or play with the electrical appliances Some liquids are good conductor …
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CBSE Sound Class 8 Extra Questions Sound is a sequence of waves of pressure that propagates through compressible media such as air or water Sound is produced by vibrating objects Sound helps us to communicate with one another, we can hear a variety of sounds in our surrounding The to and fro and back and …
CBSE Friction Class 8 Extra Questions Friction is the “evil” of all motion. No matter which direction something moves in, friction pulls it the other way Friction is caused by the irregularities on the two surfaces in contact Friction depends on nature of surfaces in contact Friction depends on how hard the two surfaces press …
CBSE Friction Class 8 Extra Questions Friction is the “evil” of all motion. No matter which direction something moves in, friction pulls it the other way Friction is caused by the irregularities on the two surfaces in contact Friction depends on nature of surfaces in contact Friction depends on how hard the two surfaces press …
CBSE Force and Pressure Class 8 Extra Questions A push or a pull on an object is called a force.A force arises due to the interaction between two objects. Force has magnitude as well as direction. Force may change in the state of motion of an object or it may bring about a change in …
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CBSE Reaching the Age of Adolescence Human beings become capable of reproduction after the puberty sets in. The period of life when the body undergoes changes, leading to reproductive maturity, is called adolescence Between the age of 11 years and 19 years children are called adolescents. The human body undergo several changes during adolescence; these …
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CBSE Reproduction in Animals Reproduction is the important process required for continuation of the species. There are two mode of reproduction: Sexual and Asexual. In sexual reproduction both male and female gametes fuses to form Zygote which develops into complete individual. Human follows sexual mode of reproduction in which female gamete (egg) fuses with male …
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CBSE Revision Notes