CBSE ADDA

      Chapter Sound and Reflection of sound        O bjective:   Multiple choice Questions 1. A sound wave travels from east to west, in which direction do the particles of air move? (A) East – west                           (B) North - south (C) Up and down                         (D) None of these 2. In which medium sound travels faster ? (A) Solid                                     (B) Liquid (C) Gas                                      (D) None of these 3. What is the name of short duration wave? (A) Pulse                                    (B) Frequency (C) Time period                           (D) Velocity 4. What is the velocity of sound in water at room temperature? (A) 1500 m/s                              (B) 330 m/s (C) 1500 km/s                             (D) 330 km/s 5. The unit of quantity on which pitch of the sound depen

Fill in the blanks : Chapter:Habitat (i)In the sea plants and animal surrounded by -------------------------(saline water) (ii) The place where living beings live is called their -------------(Habitat) (iii) In Cactus plant, ---------------are reduced to spines (Leaves) (iv) Global warming increases the concentration of ------in the atmosphere(carbon dioxide) (v) ------------are examples for Decomposers (Bacteria and fungus) (vi) Living component of a habitat is called as -------------- (Biotic) (vii) Anything which produce and response in an organism is called as -----------(Stimulus) (viii) A potted plant is kept in a card board box with a small slit of sun light exhibits ----- Movement  Phototrophic) (ix) If we blow through lime water it turns milky. This proves that exhaled air contains ------ (carbon  dioxide) (x)-------- are plants that grow in dry desert area (Xerophytes) (xi)--------- are plants that grow in moist area (Mesophytes) (xii) )--------- ar

  JSUNIL TUTORIL, PUNJABI COLONY SAMASTIPUR    CBSE CLASS FROM 6th   TO 10+2  Science and Mathematics Solved questions to excel in examination: Chapter Adaptation 12. Q. Distinguish between herbivores and carnivores? Ans: Herbivores feed on plants where as carnivores feed on flesh of other animals. 13. Q. State any two flight adaptation in aerial animals? Ans: 1.Hhaving streamline body shape that protect from wind 2. Having hollow bones called pneumatic bones 14.Q. How does temperature affect plants and animals? Ans.  (i) Leaves and stem of plants wither (ii) Skin change into dark colour (iii) Affect size of animals 15.Q. What is the role of light on plants? Ans:  (i) Help in photosynthesis (ii) Help in fruit and flower developments (iii) Help in growth of plants 16. Q.What types of adaptation seen in desert habitat? Ans: (i) store water in body                                 (ii) Use less water to survive (iii) Keep away from ho

1. Q. What is habitat?   JSUNIL TUTORIL, PUNJABI COLONY SAMASTIPUR    CBSE CLASS FROM 6 th   TO 10+2  Science and Mathematics Ans:  A place where living things   live naturally is known as habitat (Home). For example: (i)Aquatic habitat refers to the water where plants and animals survive like pond, river, sea (in water), (ii)  Terrestrial habitat: It refers to the land where all plants and animals survive. It includes deserts, forests and grasslands, as well as coastal and mountain regions 2. Q.  What are the Components (Parts) of Habitat? Ans: There are two main components of habitat (a) Biotic Components: Living things present in a habitat are called biotic component like plants , animals and micro organism. (b) Abiotic Components: All the non-living things present in a habitat is called abiotic components like air water soil rocks, sunlight and heat etc. 3.Q. How biotic and abiotic components depend on each other? Ans: Biotic and abiotic compo