Class 6th science
1. Natural (नैचुरल) — प्राकृतिक — Prakritik
2. Resource (रिसोर्स) — संसाधन — Sansadhan
3. Surface (सरफेस) — सतह — Satah
4. Abundant (अबन्डन्ट) — प्रचुर — Prachur
5. Essential (एसेंशियल) — आवश्यक — Aavashyak
6. Germination (जर्मिनेशन) — अंकुरण — Ankuran
7. Photosynthesis (फोटोसिंथेसिस) — प्रकाश संश्लेषण — Prakash Sanshleshan
8. Recreation (रिक्रिएशन) — मनोरंजन — Manoranjan
9. Habitat (हैबिटैट) — आवास — Awaas
10. Groundwater (ग्राउंडवॉटर) — भूजल — Bhujal
11. Nonporous (नॉनपोरस) — अभेद्य — Abhedya
12. Springs (स्प्रिंग्स) — झरना — Jharna
13. Irrigate (इरिगेट) — सिंचाई करना — Sinchai Karna
14. Domestic (डोमेस्टिक) — घरेलू — Gharelu
15. Consumption (कंजम्प्शन) — उपभोग — Upbhog
16. Evaporation (इवैपोरेशन) — वाष्पीकरण — Vashpeekaran
17. Condensation (कंडेन्सेशन) — संघनन — Sanghanan
18. Circulation (सर्कुलेशन) — संचलन — Sanchalan
19. Saline (सेलाइन) — खारा — Khara
20. Monsoon (मॉनसून) — वर्षा ऋतु — Varsha Ritu
21. Flood (फ्लड) — बाढ़ — Baadh
22. Landslide (लैंडस्लाइड) — भूस्खलन — Bhuskhilan
23. Contaminated (कंटैमिनेटेड) — दूषित — Dooshit
24. Drought (ड्रॉट) — सूखा — Sookha
25. Dehydration (डिहाइड्रेशन) — निर्जलीकरण — Nirjalikaran
26. Conservation (कंजरवेशन) — संरक्षण — Sanrakshan
27. Harvesting (हार्वेस्टिंग) — संग्रह — Sangrah
28. Storage (स्टोरेज) — भंडारण — Bhandaran
29. Recharge (रीचार्ज) — पुनर्भरण — Punarbharn
30. Filter (फिल्टर) — छानना — Channa
31. Tank (टैंक) — टंकी — Tanki
32. Vapour (वेपर) — वाष्प — Vashp
33. Droplets (ड्रॉपलेट्स) — बूंदें — Boonden
34. Temperature (टेम्परेचर) — तापमान — Taapmaan
35. Heated (हीटेड) — गरम — Garam
36. Solid (सॉलिड) — ठोस — Thos
37. Liquid (लिक्विड) — द्रव — Drav
38. Gas (गैस) — गैस — Gas
39. Ice (आइस) — बर्फ — Barf
40. Steam (स्टीम) — भाप — Bhaap
41. Pure (प्योर) — शुद्ध — Shuddh
42. Season (सीजन) — ऋतु — Ritu
43. Damage (डैमेज) — नुकसान — Nuksaan
44. Structure (स्ट्रक्चर) — संरचना — Sanrachna
45. Disease (डिजीज) — रोग — Rog
46. Scarcity (स्कार्सिटी) — कमी — Kami
47. Contamination (कंटैमिनेशन) — प्रदूषण — Pradushan
48. Extended (एक्सटेंडेड) — लंबा — Lamba
49. Yield (यील्ड) — उपज — Upaj
50. Evaporate (इवैपोरेट) — वाष्प बनना — Vashp Banna
51. Livestock (लाइवस्टॉक) — पशुधन — Pashudhan
52. Malnutrition (मैलन्यूट्रिशन) — कुपोषण — Kuposhhan
53. Migrate (माइग्रेट) — पलायन करना — Palayan Karna
54. Civic (सिविक) — नागरिक — Nagrik
55. Pressure (प्रेशर) — दबाव — Dabaav
56. Agriculture (एग्रीकल्चर) — कृषि — Krishi
57. Industry (इंडस्ट्री) — उद्योग — Udyog
58. Cleaning (क्लीनिंग) — सफाई — Safai
59. Heating (हीटिंग) — गर्म करना — Garam Karna
60. Cooling (कूलिंग) — ठंडा करना — Thanda Karna
61. Electricity (इलेक्ट्रिसिटी) — बिजली — Bijli
62. Collect (कलेक्ट) — इकट्ठा करना — Ikattha Karna
63. Absorb (अब्जॉर्ब) — सोखना — Sokhna
64. Soil (सॉइल) — मिट्टी — Mitti
65. River (रिवर) — नदी — Nadi
66. Lake (लेक) — झील — Jheel
67. Pond (पॉन्ड) — तालाब — Talaab
68. Ocean (ओशन) — महासागर — Mahasagar
69. Canal (कैनाल) — नहर — Nahar
70. Stream (स्ट्रीम) — धारा — Dhara
71. Well (वेल) — कुआँ — Kuan
72. Rainfall (रेनफॉल) — वर्षा — Varsha
73. Cloud (क्लाउड) — बादल — Baadal
74. Hail (हेल) — ओले — Ole
75. Snow (स्नो) — हिम — Him
76. Sunlight (सनलाइट) — धूप — Dhoop
77. Splash (स्प्लैश) — छींटा — Cheenta
78. Puddle (पडल) — पानी का गड्ढा — Gaddha
79. Rise (राइज) — उठना — Uthna
80. Cooler (कूलर) — ठंडा — Thanda
81. Join (जॉइन) — जुड़ना — Judna
82. Fall (फॉल) — गिरना — Girna
83. Spread (स्प्रेड) — फैलना — Phailna
84. Queue (क्यू) — कतार — Kataar
85. Avoid (अवॉइड) — बचना — Bachna
86. Reuse (रीयूज़) — पुनः उपयोग — Punah Upyog
87. Flush (फ्लश) — बहाना — Bahna
88. Leak (लीक) — रिसाव — Risaav
89. Immediately (इमीडियेटली) — तुरंत — Turant
90. Future (फ्यूचर) — भविष्य — Bhavishya
91. Method (मेथड) — तरीका — Tareeka
92. Increase (इनक्रीज) — बढ़ाना — Badhana
93. Availability (अवेलेबिलिटी) — उपलब्धता — Uplabdhata
94. Direct (डायरेक्ट) — सीधे — Seedhe
95. Underground (अंडरग्राउंड) — भूमिगत — Bhoomigat
96. Filtered (फिल्टर्ड) — छाना हुआ — Chhana Hua
97. Dirt (डर्ट) — गंदगी — Gandagi
98. Prevent (प्रिवेंट) — रोकना — Rokna
99. Contain (कंटेन) — शामिल होना — Shaamil Hona
100. Cover (कवर) — ढकना — Dhakna
1. Q: Why is Earth called the Blue Planet?
A: Because most of the Earth is covered with water.
2. Q: In which three states is water found?
A: Solid, liquid and gas.
3. Q: What are the properties of pure water?
A: It is colourless, tasteless and odourless.
4. Q: How much water on Earth is in seas and oceans?
A: About 97%.
5. Q: Why is sea water not suitable for drinking?
A: Because it is salty.
6. Q: Why is water essential for living beings?
A: Because all plants, animals and humans need it to survive.
7. Q: Why do plants need water?
A: For photosynthesis and growth.
8. Q: What is surface water?
A: Water found in rivers, lakes, ponds and oceans.
9. Q: What is groundwater?
A: Water stored under the ground.
10. Q: How can we get groundwater?
A: By wells and tubewells.
11. Q: What is the main source of water?
A: Rain.
12. Q: Name two domestic uses of water.
A: Drinking and cooking.
13. Q: Name two agricultural uses of water.
A: Irrigation of crops.
14. Q: How do industries use water?
A: For cleaning, cooling and electricity.
15. Q: What is evaporation?
A: Change of water into water vapour due to heat.
16. Q: What is condensation?
A: Change of water vapour into liquid water.
17. Q: What is the water cycle?
A: Continuous movement of water in nature.
18. Q: How are clouds formed?
A: By condensation of water vapour.
19. Q: What is rain?
A: Water falling from clouds.
20. Q: Why is rainwater considered pure?
A: Because it comes from evaporation.
21. Q: What is a flood?
A: Overflow of water after heavy rain.
22. Q: Name one effect of flood.
A: Damage to crops and buildings.
23. Q: What diseases spread during floods?
A: Cholera and typhoid.
24. Q: What is drought?
A: Long period without rainfall.
25. Q: What happens to crops during drought?
A: Crop yield decreases.
26. Q: What is dehydration?
A: Lack of water in the body.
27. Q: What happens to soil during drought?
A: It becomes dry.
28. Q: Why do people migrate during drought?
A: Due to lack of food and water.
29. Q: What is conservation of water?
A: Saving water.
30. Q: Why should we conserve water?
A: To avoid shortage.
31. Q: How can we save water while bathing?
A: Use a bucket instead of a shower.
32. Q: Why should taps be turned off after use?
A: To avoid wastage of water.
33. Q: What is rainwater harvesting?
A: Collection and storage of rainwater.
34. Q: Where is rainwater stored?
A: In tanks or underground.
35. Q: What is groundwater recharge?
A: Sending rainwater into the ground.
36. Q: Why should storage tanks be covered?
A: To keep water clean.
37. Q: Name two natural sources of water.
A: Rivers and lakes.
38. Q: What happens to puddles after sunshine?
A: They evaporate.
39. Q: What is steam?
A: Water in gaseous form.
40. Q: Why is water important for animals?
A: They need it to live.
A. Tick the correct option
- (b) surface water
- (c) evaporation
- (d) all of these
B. Fill in the blanks
- The tiny droplets of water form clouds in the sky.
- A drought is an extended period of months or years when a region does not get any rainfall.
- Most of the water found on the Earth is in the form of seas and oceans.
- Plants and animals also release water vapour during transpiration and respiration.
C. Very short answer
- Rainwater is the purest form of water.
- Sources of water: rivers, lakes, ponds, seas, oceans, rain and groundwater.
- Water found in rivers, lakes and ponds is called surface water.
- Water vapours enter the air by evaporation and transpiration.
- Heavy rain causes floods.
D. Short answers
-
Four uses of water:
- Drinking
- Cooking
- Washing
- Irrigation of crops
-
There are three types of clouds — cirrus, cumulus and stratus.
-
Three effects of flood:
- Damage to houses
- Loss of crops
- Spread of diseases
-
We conserve water to avoid shortage and save it for the future.
-
Rainwater harvesting is the collection and storage of rainwater for later use.
E. Long answers
1. Different uses of water
Water is used for drinking, cooking, bathing, washing clothes, irrigation, industries, generating electricity and cleaning. Plants and animals also need water to survive.
2. Difference between evaporation and condensation
Evaporation: Change of water into water vapour due to heat.
Condensation: Change of water vapour into liquid water when cooled.
3. Drought and its effects
Drought is a long period without rainfall.
Effects: shortage of water, crop failure, hunger, migration of people and animals.
4. Ways to conserve water
- Turn off taps properly
- Use a bucket instead of a shower
- Repair leaking pipes
- Harvest rainwater
- Do not waste water
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