Hindi 3 L No.3 read the ... Prepare for the UT – new kings & kingdom/ Go through the questions discussed in the class Phy Why should I learn about Heat. How is
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Class VII - B Subject Home Work ... Tamil Complete the given homework ... Hindi L/w all given words -1 time . Author: User Created Date:
central board of secondary education, ... hindi elective urou elective 003 bengali 105 tamil 107 telugu 108 sindhi marathi 109 gujarat 110
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Eng Do the Worksheet on present Tense ... Hindi Read Page No. 13, Read 2nd Lesson & write hard words 2 times Tamil Thanipadal Question & Answer
fŒT1 751007 CENTRAL BOARD OF SECONDARY EDUCATION, DELHI Regional Office, Saheed Nagar, Bhubaneswar — 751007 (Odisha) — 2015 ALL INDIA SENIOR SCHOOL CERTIFICATE EXAMINATION — 2015
The LIVING WORLD (A Book of Science & Technology) Class-VII Publication Division D.A.V. College Managing Committee ... C H A P T E R1 Nutrition in Living
the form of standard performance categories. Structure and Basis The FOUR PARTS of The Catechism of the Catholic Church provide a ready structure and basis of this model. “Its very structure follows the development of the faith right up to the great
SYLLABUS 2017-18 CLASS -VII SUBJECT PERIODIC ASSESSMENT-1 HALF- YEARLY ... Adjectives and its kinds Modals Articles Writing skill Informal letter writing
CHANDIGARH REGION CLASS VII MODEL QUESTION ANSWER SCRIPT SCIENCE
TIME ALLOWED:-2:30 Hours MAX MARKS:-60
GENERAL INSTRUCTIONS: (1) The question paper comprises of two sections A and B . You have to attempt all the two sections. (2) All questions are compulsory. (3) Question number 1 to 5 are very short answer type questions. Each question carries 1 mark. (4) Question number 6 to 12 are short answer type questions. Each question carries 2 marks. (5) Question number 13 to 19 are also short answer type questions. Each question carries 3 marks. (6) Question number 20 and 22 are long answer type questions. Each question carries 5 marks. (7) Question number 23to 27 are Multiple Choice Questions. Each question carries 1 mark.
Q1. Burning of coal is which type of change, Physical or chemical? Ans. Chemical change Q2. How is soil formed? Ans. Soil is formed by weathering of rocks. Q3. Name the reproductive part of the plant? Ans. Flower
Q4. Draw the symbols to represent cell and battery? Ans. Symbols of cell and battery
Q5. Give two examples of decomposers. Ans. bacteria, fungi Q6. How is clayey soil useful for crops? Ans .Clayey soil has small sized particles, more water holding capacity, large amount of humus. Q7. Name the main respiratory organs in human being and fish. Ans. Human being - lungs fish–gills Q8. What is virtual image? Give one situation where virtual image is formed? Ans. The image which cannot be obtained on the screen. When we stand in front of dressing table mirror it is an virtual image. Q9. Sketch the cross section of soil and label the various layers. Ans
Q10. Explain the function of bar screens in a waste water treatment plant. Ans. Bar Screens are Use to remove large objects like rags, cans, plastic packets, napkins from wastewater treatment plant. Q11. State two differences between concave and convex lens. Ans. Concave lens is thinner in the middle and thicker at the ends and it diverges the light ray falling on it. Convex lens is thicker in the middle and thinner at the ends and it converges the light rays falling on it. Q 12 Do you think an electromagnet can be used for separating plastic bags from a garbage heap? Explain. Ans. No, an electromagnet can be used for separating plastic bags from a garbage heap. Since plastic bags are non-magnetic material and electromagnet is used to seperate only the magnetic materials. Q13. (a) When carbon dioxide is passed lime water it turns milky due to formation of ______ .
(b) The chemical name of baking soda is _____ . (c) Changes in which new substance is formed are called _____ changes. Ans a) calcium carbonate (b) Sodium hydrogen carbonate (c) Chemical Q14. List one similarity and two differences of aerobic and anaerobic respiration . Ans. Similarities –Both produces energy Differences- a)Aerobic respiration produces more energy & it takes place in the presence of oxygen. B)Anaerobic respiration produces less energy & it take place in the absence of oxygen. Q15. Draw the diagram of human excretory system and label its various parts. Ans.Human excretory system-
Q16. Draw the circuit diagram to represent an electric circuit.Name any two effects of electric current. Ans. Circuit diagram
Two effects are heating effect and magnetic effect. Q 17. Explain how soil pollution can be prevented. ( any three points) Ans. a)Pesticides and insecticides should be used in limited quantity and find natural way to prevent it. B)Plastic bags should b banned and it doesn't decompose and gives rise to soil pollution. C) Industrial waste shouldn't be dumped directly as it kill necessary micro organisms of soil. Q18. (a)What is reflection of light? (b) Give one use each of concave and convex mirror. Ans. Reflection of light. Reflection is when light bounces off an object. If the surface is smooth and shiny, like glass, water or polished metal, the light will reflect at the same angle as it hit the surface. This is called reflection. A) Concave mirror use by the dentists to see the enlarged image of teeth. B)Convex mirror use as rear view mirror of the vehicles. Or any other correct use of each Q19. Explain the role of forest in maintaining the balance between oxygen and carbon dioxide in the atmosphere . Ans. Forest play an important role in maintaining the balance between oxygen and carbon dioxide in the atmosphere. The green plants and trees present in the forest take in carbon dioxide which is released by the animals and release oxygen through
the process of photosynthesis which are breathe in by the animals and thus maintains the balance between oxygen and carbon dioxide in the atmosphere.
Q20. Answer the following (a) The organ which pumps the blood is _____. (b) The fluid part of the blood is ___. (c)_____ cells help in clotting of blood. (d) Red colour of the blood is due to presence of ____. (e)Human heart has ____ chambers. Ans. (a) heart (b) plasma (c) Platelets (d) haemoglobin (e) 4 Q21.
(a)What is the difference between sexual and asexual reproduction? (b) Write down any three methods of asexual reproduction?
Ans.a) Asexual Reproduction (i) One parent is involved. (ii) New generation is identical or true copy of their parent. (iii) It doesn't require the formation of gametes.
Sexual reproduction (i) Two parents are involved. (ii) New born are similar to their parents. (iii) It requires the formation of gametes
(b) .Different methods of asexual reproduction: (i) Vegetative propagation: In this asexual reproduction, new plants are produced from roots, stems, leaves and buds of individual plant. Examples: Stem cutting cutting in champa, eye growth in potatoes, bud in case of bryophyllum etc.
(ii) Budding: The bud is a small projection which gradually grows and gets detached from the parent cell and forms a new yeast cell. The new yeast cell grows, matures and produces more yeast cells. example: Yeast. (iii) Fragmentation: In this mode of reproduction, the growth and multiplication is done by rapidly breaking down into two or more fragments. Each pieces grow into new individuals whenwater and nutrients are available. Example: Algae Q22. (a)What is sludge? Explain how it is treated? b) Name two chemicals used to disinfect water Ans. (a) Solids waste like faeces settle at the bottom of tank during sedimentation is called sludge. B) Sludge is removed with a scraper and then transferred to a separate tank where it is decomposed by the anaerobic bacteria to produce biogas. 1+ (b) Ozone and Chlorine
SECTION - B Q23.
Digestion of food is a (a) Physical change (b) Chemical change (c) Both (d) None Q24. During heavy exercise, we get cramps in legs due to accumulation of (a)Carbon dioxide (b) Alcohol (c) Water (d) Lactic acid Q25. Mature ovary forms the (a)Fruit (b) Seed (c)pistil
(d) Stamen Q26. Current flows through the circuit when the circuit is in the condition. (a)Broken (b) Incomplete (c)Closed (d) Open Q27. Which of the following is not a plant product (a)Plywood (b) Gum (c)Resin (d) Kerosene Ans. 23. 24 25 26 27