Class IX

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Class IX assignment Chapter: Sound

9 th Chapter: sound –Guess Questions for practice 1. If you place some small blades on a drum, what will you observe when you beat this drum with a drum stick? Explain. 2. Describe an activity with a (a) metre scale (b) rubber band to show that only a vibrating body produces sound. 3. With the help of tuning fork demonstrate that sound is produced by a vibrating body. 4. What is vibrating in the following musical instruments producing by a musical sound? (a) Violin (b) drum (c) saxophone (d) flute (e) guitar (f) dholak (g) tabla (h) sitar 5. What is medium? What constitutes the medium? 6. Describe an activity to show sound travels faster through a solid medium than through a gaseous medium. 7. Describe an activity to show sound travels faster through a solid medium than through a liquid medium. 8. Describe the experiment to demonstrate that waves do not c...
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CBSE: 9th Subject: Biology assignment Chapter: Tissues

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Biology assignment Chapter: Tissues  Q1 Plant and animal tissues are different . Comments. Q2 What is the meristamatic tissue ? what are its characteristics ? Q3 Describe the occurrence of apical. Lateral and intercalary meristems . Q4 Define permanent tissue . What are different categories of permanent tissue . Q5 Give distribution ,types and function of parenchymatous tissues. Q6 How is collenchymas different from sclerchma ? Q7 Describe complex permanent tissue ? Q8 What are the different compounds of xylem and phloem ? Q9 Give on outline classification of animals tissue. Q10 Give characteristics and types of the epithelial tissue . Q11 Diagrammatically show the difference in the three types of muscle fibres . Q12 Where are fats stored in our body . Define their structure . Q13 What are the type...
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Obtaining and Utilization Food Class 7 Science Solved question (Basic Science Questions answers)

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A. Answer these questions 1. Name the three life process help living being to procure energy from food? Answer: Three life processes that help living organisms to procure energy from food are: (i) Digestion (Nutrition) (ii) Respiration (iii) Transportation 2. What are Autotrophs? Name an organism other than other than green plant that is an autotroph. Answer: Autotrophs are organisms that can prepare their own food. Chlamydomonas is a type of green algae which is an example of an autotroph, other than green plants. Cyanobacteria are also an example of autotroph. 3. Name three type of heterotrophic nutrition Answer: Three types of heterotrophic nutrition are: (i) Saprophytic nutrition (ii) Parasitic nutrition (iii) Holozoic nutrition 4. What are enzymes? Answer: Enzymes are chemical substances that act as biological catalysts and are important for carrying out biochemical processes, such as digestion, in our body ...
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9th Atoms and Molecules Question bank By KV For CBSE Board

CHAPTER - 3 “Atoms and Molecules” 1. Laws of Chemical Combination 2. John Dalton's Atomic Theory 3. Atoms, ions & Chemical Formula 4. Mole Concept 5. Molar Mass & Avogadro constant Download Test Paper with solution CBSE Study By Jsunil ********************************************************************************* 1 Mark Questions: 1. Who gave law of conservation of mass ? 2. What term is used to represent the mass of 1 mole molecules of a substance? 3. What name is given to the number 6.023 x 10 23 ? 4. What is molecular mass? 5. Give Latin names for sodium & mercury. 6. *How many atoms are there in exactly 12 g of carbon ? 7. Define mole. 8. Calculate formula unit mass of CaCl2. [ At. Mass : Ca = 40 u , Cl = 35.5 u ] 9. Name a diatomic gas. 10. How many atoms are present in H 2 SO 4 . ...
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Light Shadow and Reflections for CBSE Class 6th

CBSE TEST PAPER SCIENCE- LIGHT , SHADOWS AND REFLECTIONS Light Shadow and Reflections for CBSE Class 6th VI – SCIENCE WORKSHEET  Light, Shadows And Reflections I) Fill in the blanks: 1. __________________ helps us to see objects.(Non luminous) 2. Objects that give out or emit light of their own are called _________(Luminous) 3. ____________objects allow light to pass through them completely. (Transparent) 4. ____________objects do not allow the light to pass through it at all. (Opaque) 5. ____________objects allow the light to pass through them partially.(Translucent) 6. Light travels in a _____________.(Straight path) 7. _____are formed when an opaque object comes in the path of light.(Shadow) 8. __________ and ___________ objects are essential for the formation of shadows on a screen.(Light,Screen) 9. A shadow cast by the heavenly bodies is called an ________( Eclipse) 10. Images formed by a pin –hole camera are ______________(inverted) 11. We ca...
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