9th
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- Why are the mirrors fitted on the outside of the cars are convex? We know that, convex mirror always produces virtual and diminished image of the object which covers the wider field of view. As the mirrors... 1
- Why are concave mirrors are used in solar devices? We know that, when a parallel beam of light which may parallel to principal axis is incident on the concave mirror then after reflection the... 1
- Describe the positions of the source of light with respect to a concave mirror in torch light, projector lamp Torch light: In torch light concave mirror is used and the source of light is placed at the focus of the concave mirror so that after reflec... 1
- Explain the difference between plane mirror, a concave mirror and a convex mirror with respect to the type and size Plane mirror: The image formed in a plane mirror is virtual and erect. And the size of the image produced is same as the size of the object.... 1
- Which technical difficulties you face while using the computer? What did you do to overcome them? Answer: Common difficulties are the computer hanging or becoming slow, virus attacks, internet problems, power cuts and devices (printer, pe... 1
- What devices will you use to share the knowledge to others that you have? The devices I used to share the knowledge that I have are computer, laptops, mobile phones, radio’s, television. 1
- Explain the difference between the different generations of computer. How did science contribute to this development? The old generations of computer are big in hardware due to which we can use it only at one place. During the development of generations of c... 1
- Which are the various devices used in information Communication? How they are used in the context of science? Various devices used in information communication are: Computers, Laptops, Mobiles, Radios, Television, etc. Computers, Laptops and Mobiles:... 1
- What precautions should be taken while using various types of software on the computer? While using various software on computer we should have to take following precautions: When we are installing the software we have to check... 1
- How does a computer work? The computer consists of the processor, the input unit, the processing unit and the output unit. Input unit: Every information or data is fe... 1
- Which application software in computer system did you find while studying science and how? While studying science we requires most of the application software which are running in computer. Microsoft PowerPoint: For the presentatio... 1
- Explain the role and importance of information Communication in science and technology. The role and importance of Information Communication in Science and Technology are given below: It helps with the demonstration process- Som... 1
- Fill in the blanks to complete the statements. Justify the statements. a) While working with computer we can read the information stored in its memory and perform other actions in its internal b) While presentin... 2
- What are the other emergency measures adopted during disasters? Civil administration makes use of boats to rescue people who are trapped in a flooded area. Other items like wooden boards, bamboo floats an... 1
- Write about disaster management. An action implemented via proper planning, organized activity and coordination, disaster management consists of prevention of loss and dange... 1
- What is the 3R Mantra of waste management? The 3 R Mantra is Reduce (reducing the waste), Reuse (reuse of waste) and Recycle (recycling of waste). 1
- What is solid waste? Solid waste is the waste materials that are released via the several daily human activities. They are a good source of energy if disposed of... 1
- What is the main role of the World Meteorological Organization? The World Meteorological Organization, set up on 23 March 1950 by the United Nations Organization has a crucial role to play in food securit... 1
- What is the importance of weather in the living world? It is evident that the study of meteorology or the climate is very important from the view of human life. Given here are a few points: It is... 1
- Which day is observed as ‘World Meteorological Day’? 23 March is celebrated as ‘World Meteorological Day.’. 2
- What is the important role of climate in our day to day life? Climate has a crucial role to play in our day to day life, influencing our basic needs such as food, clothing and shelter as well as our occ... 1
- explain the differences Degradable and non-degradable waste Biodegradable waste Non-biodegradable waste (i) Biodegradable waste can be degraded or broken down into simpler, harmless substances by livi... 1
- Explain the differences Weather and climate Weather Climate 1. Weather is defined as the state of the atmosphere on a current day at a current time. Climate is defined as the average c... 1
- What is the weather and climate? Weather is the atmospheric conditions at a specific time at a particular place, whereas the average daily readings of various weather-relate... 1