science for 3 grade

Question: Cells X are formed as the roots and stem grow old. Identify X. Give one function. Answer: X are cork cells, which prevent the loss of water..

Question: What are hydrocarbons? Answer: Compounds containing only the elements carbon and hydrogen are called hydrocarbons. They are a parent class of organic carbon compounds from which all other classes of hydrocarbon sub groupings of compounds can be made. Examples: Ethane (C 2 H 4 )..

Question: State ohm's law. Answer: When temperature and other physical parameters remain constant, the current flowing through a conductor is directly proportional to the potential difference across its end..

Question: Define osmoregulation. Answer: The process by which the water content and the ion concentration is regulated and kept constant in the cells is known as osmoregulatio..

Question: What is least distance of distinct vision? Answer: The minimum distance upto which an eye can see clearly is called the least distance of distinct visio..

Question: What is meant by management and conservation of resources? Answer: Management and conservation of resources means scientific utilization of resources while maintaining their sustained yield and qualit..

Question: What is meant by diffused reflection? Answer: In this type of reflection the different portions of the surface reflect the incident light in different directions and no definite image is formed but the surface becomes visibl..

Question: What are the types of reproduction? Answer: There are basically two types of reproduction - asexual reproduction and sexual reproductio..

Question: Which component of sun's energy is responsible for drying clothes? Answer: Infra-red ra..

Cattle Breed Distribution Milch Breeds Gir Gujarat, Rajasthan Sahiwal Punjab, Haryana, Uttar Pradesh Red Sindhi Andhra Pradesh Draught Breeds Malvi Rajasthan, Madhya Pradesh Nageri Delhi, Haryana, Uttar Pradesh Hallikar Karnataka K..