STUDY EDUCATION - MP Board Solutions

NCERT Class 7 Science Chapter 1 विज्ञान का निरंतर बढ़ता संसार Solutions Short Questions 1. विज्ञान हमें किस ओर प्रेरित करता है? → प्रश्न पूछने, प्रयोग करने और खोज करने की ओर। 2.वैज्ञानिकों को वायुयान बनाने की प्रेरणा कहाँ से मिली? → कागज के हवाई जहाज से। 3.विज्ञान किस प्रकार की प्रक्रिया है? → यह एक सोचने की विधि है। 4.पुस्तक के पन्नों के अंक किसे दर्शाते हैं? → तितली की उड़ान और कागज के हवाई जहाज को। 5.कुछ परिवर्तन अस्थाई होते हैं और कुछ कैसे? → स्थाई होते हैं। 6.बर्फ पिघलकर क्या बनती है? → जल। 7.फल पकने को किस प्रकार का परिवर्तन माना जाता है? → स्थाई परिवर्तन। 8.मनुष्य प्रारंभ में समय कैसे बताते थे? → सूर्य से बनने वाली परछाई देखकर। 9.प्रकाश हमें किस कार्य में सहायता करता है? → देखने में। 10.ग्रहण जैसी परिघटना किससे होती है? → पृथ्वी और चंद्रमा की परछाई से। Long Questions 1. विज्ञान का अध्ययन हमें क्या सिखाता है? → यह हमें संसार की वस्तुओं को समझने, प्रश्न पूछने और प्रयोग करने की आदत डालता है। 2.प्राकृतिक परिवर्तन किस प्रकार होते हैं? → कुछ अस्थाई होते हैं जैसे बर्फ का पिघलना, और कुछ...

Earth Moon and the Sun Class 7 Questions and Answers Science Chapter 12 Q.1. Explain how animals dwelling in the forest help it grow and regenerate. Ans. Animals help in growing and regenerating forests in many ways. Animals work as the cleaning agents in the forest. Microorganisms work on dead bodies of plants and animals and degenerate them. An’imals also help in pollination which helps in growing a number of plants. Herbivores helps the carnivores to grow as they serve as food for them. Thus flora and fauna mutually grow in the forest. Q.2. Explain how forests prevent floods. Ans. Forests can absorb a lot of water. The roots of the trees absorb the water and prevent it from flowing away. Roots of trees also help in percolation of water into the soil. This helps in preventing floods. Q.3. What are decomposers? Name any two of them. What do they do in the forest? Ans. Decomposers are the organisms which feed on the dead bodies of plants and animals. They clean the forests decaying ...

Light Shadows and Reflections Class 7 Questions and Answers Science Chapter 11 1. Which of the following are luminous objects? Mars, Moon, Pole Star, Sun, Venus, Mirror Answer:   The luminous objects are the Sun and the Pole Star. Mars, Moon, Venus, and Mirror are non-luminous objects because they do not emit their own light; they reflect light from other sources. 2.Match the items in Column A with those in Column B. Answer : Column A Column B Pinhole camera Forms an inverted image Opaque object Blocks light completely Transparent object Light passes almost completely through it Shadow The dark region formed behind the object 3. Sahil, Rekha, Patrick, and Qasima are trying to observe the candle flame through the pipe as shown in Fig. 11.16. Who can see the flame? Answer : Rekha can see the candle flame because she is looking through a straight pipe, and light travels in a straight line. Sahil, Patrick, and Qasima cannot see the flame because their pipes are bent. 4. Look at th...

Life Processes in Plants Class 7 Questions and Answers Science Chapter 10 1. Complete the following table Answer: 2. Imagine a situation where all the organisms that carry out photosynthesis on the earth have disappeared. What would be the impact of this on living organisms? Answer: If all organisms that cany out photosynthesis disappeared, there would be no production of oxygen and food for other living organisms. This would disrupt the food chain, as plants provide food for herbivores and oxygen for respiration. Without plants, life on Earth would not be sustained. 3. A potato slice shows the presence of starch with iodine solution. Where does the starch in potatoes come from? Where is the food synthesised in the plant, and how does it reach the potato? Answer: The starch in potatoes comes from the glucose produced in the leaves during photosynthesis. Photosynthesis occurs in the leaves, where food is synthesised in the form of glucose. This glucose is then transported through the pl...

Life Processes in Animals Class 7 Questions and Answers Science Chapter 9 1. Complete the journey of food through the alimentary canal by filling up the boxes with appropriate parts- Food → Mouth → ______ → Stomach → ______ → ______ → Anus Answer: Food → Mouth → Oesophagus → Stomach → Small Intestine → Large Intestine → Anus 2. Sahil placed some pieces of chapati in test tube A. Neha placed chewed chapati in test tube B, and Santushti took boiled and mashed potato in test tube C. All of them added a few drops of iodine solution to their test tubes-A, B, and C, respectively. What would be their observations? Give reasons. Answer: Observations and Reasons: Test Tube Material Used Expected Observation Reason A Chapati (unchewed) Turns blue-black Chapati contains starch , and iodine reacts with starch to give a blue-black color. B Chewed chapati No color change or light blue-black Saliva breaks down starch into sugar , so less or no starch remains to react with iodine. C Boiled & m...

Measurement of Time and Motion Class 7 Questions and Answers Science Chapter 8 1. Calculate the speed of a car that travels 150 metres in 10 seconds. Express your answer in km/h. Solution: Distance = 150 m Time taken = 10 s Speed =  D i s t a n c e c o v e r e d T i m e t a k e n =  150 m 10 s Speed in km/hr = 15 ×  18 5 = 54 km/h 2. A runner completes 400 metres in 50 seconds. Another runner completes the same distance in 45 seconds. Who has a greater speed and by how much? Solution: Runner 1: Distance = 400 m, Time = 50 s Speed =  D i s t a n c e c o v e r e d T i m e t a k e n =  400 m 50 s = 8 m/s Runner 2: Distance = 400 m, Time = 50 s Speed =  D i s t a n c e c o v e r e d T i m e t a k e n =  400 m 450 s = 8.89 m/s Difference = 8.89 – 8 = 0.89 m/s Hence, speed of runner 2 is greater by approximately 0.89 m/s. 3. A train travels at a speed of 25 m/s and covers a distance of 360 km. How much time does it take? Solution: Speed = 25 m/s Distan...