10th
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- State whether right or wrong with reasons. (a) The future of tourism is bright in India due to its natural diversity. a. The future of tourism is bright in India due to its natural diversity. Answer: Right. b. Tourism is an invisible trade. Answer: Right. c.... 1
- If the height of a satellite completing one revolution around the earth in T seconds is h1 meter, Time period of the satellite is given as T = frac2π(R+h)^(3/2)√(GM) When the height of the satellite is h₁, it takes T time to revolve aroun... 1
- How much time a satellite in an orbit at height 35780 km above earth’s surface would take Given: Height of the satellite, h = 35780 km = 35.78×10⁶m Let the original mass of Earth be M. Then its new mass M’ will be 4M. ∴ M’= 4×6×10... 1
- If mass of a planet is eight times the mass of the earth and its radius is twice the radius of the earth, what will be the escape velocity for that planet? Correct answer is 22.4 km/s https://youtu.be/JewcniYEVsY 1
- Complete the following table IRNSS Weather study & predict Earth’s observation read in image 1
- Why it is beneficial to use satellite launch vehicles made of more than one stage? The major portion of weight in satellite launch vehicles is contributed by fuel. Thus, vehicles have to carry a large weight of fuel during... 1
- What is meant by satellite launch vehicles? Explain a satellite launch vehicle developed by ISRO with the help of a schematic diagram. A rocket used to carry an artificial satellite to a desired height above the earth's surface and then project it with a proper velocity so t... 1
- Why are geostationary satellites not useful for studies of polar regions? The geostationary satellites orbit above the equator or in equator plane, these satellites can’t fly over the polar regions. Also these sate... 1
- What is meant by the orbit of a satellite? On what basis and how are the orbits of artificial satellites classified? Orbit of a satellite Is its path around the earth. Orbits of artificial satellites can be classified on various basis. On the basis of the a... 1
- What is meant by an artificial satellite? How are the satellites classified based on their functions? A man made object revolving around the earth or any other planet in a fixed orbit is known as artificial satellites. Based on their function... 1
- State with reasons whether the following sentences are true or false a. If a spacecraft has to be sent away from A) If a spacecraft has to be sent away from the influence of earth’s gravitational field, its velocity must be less than the escape velocity... 2
- Fill in the blanks and explain the statements with reasoning: a. If the height of the orbit of a satellite from the earth surface Answer:1: If the height of the orbit of a satellite from the earth surface is increased, the tangential velocity of the satellite will decre... 1
- -: A Pledge for Life :-
- What are the meanings of following symbols? Write your role accordingly?
- Which are the reasons for endangering the many species of plants and animals? How can we save those? Many species are endangered mainly because of human activities that destroy their habitats or kill them; they can be saved by protecting hab... 1
- Write the names of biodiversity hot spots Biodiversity hotspots in India: (1) Himalaya, (2) Indo-Burma, (3) Western Ghats and Sri Lanka, (4) Sundaland (which includes the Nicobar Isl... 1
- What do we learn from the story of Jadav Molai Peyang? The story of Jadav Molai Payeng teaches us that even one determined person can create a whole forest and make a big difference to the enviro... 1
- How the biodiversity can be conserved? Biodiversity can be conserved by protecting organisms in their natural habitats (in-situ conservation), by protecting them outside their hab... 1
- Write the types and examples of biodiversity Biodiversity is of three types: genetic diversity, species diversity and ecosystem diversity. Genetic diversity: variation in genes among in... 1
- Why does the human beings have important place in environment? Human beings have an important place in the environment because they affect it more than any other organism, and only they can consciously p... 1
- Write the factors affecting environment. The environment is affected by natural factors and by human (man-made) factors. Natural factors: Earthquakes, volcanic eruptions, floods, dr... 1
- Which projects will you run in relation to environmental conservation? How? Projects for environmental conservation that a student can run, with how to run them: Tree plantation and care: plant native trees in the sc... 1
- How will you justify that overcoming the pollution is a powerful way of environmental management? Controlling pollution is a powerful way of environmental management because pollution is the main cause of damage to air, water, soil and li... 1
- Write short note on e. Disaster and its management A disaster is a sudden event that causes great loss of life, property and the environment; disaster management is the planning and action ta... 1