7th Phy Work Sheet

1. Explain how electric bulb works.

2 .Show the relationship between acceleration and mass of a body.

3.    A person carrying a bag of 25 kg climbs up to a height of 5 m in 30 seconds. Calculate the power delivered by him to the bag.

4.    Certain force acting on 35 Kg mass changes it velocity from 6 m/s to 9 m/s. Calculate the raise in K.E. for that body.

5.    Write any four uses of spherical mirrors.

9th B Phy Work sheet

1. Derive expression for the variation of acceleration due to gravity with latitude. What would be the time period of rotation of the earth to make the bodies at equator weightless?

2. State and explain kepler’s laws of planetary motion.

3 .Define kinetic energy. Derive an expression for it.

4 .The bob of a pendulum is released from a horizontal position. If the length of the pendulum is 1 m, What is the speed with which the bob reaches the lower most point, given that it dissipates 10% of the initial energy against air resistance.

5 .Consider two blocks of masses m₁ and m₂ (m₁ > m₂) connected by an inextensible string passing over a smooth frictionless pulley. Two blocks are released from same level. At any instant ‘t’; If ‘x’ is the relative displacement of the blocks, then find

            (i) work done by tension on ‘m₁’

            (ii) work done by tension on ‘m₂’

6 .A man standing on the edge of a roof of a 20 m tall building projects a ball of mass 100 g vertically up with a speed of 10 ms^–1 and simultaneously throws another ball of same mass vertically down with the same speed. Find the kinetic energy of each ball when they reach the ground. (g = 10 ms^–2)

8th A Bio Work Sheet

1.Why leagumes are desirable in crop rotation?    

2.What is artificial insemination? What are the advantages of artificial insemination?

3. Write about the social and psychological concerns of adolescents.

4.List out the names of various endocrine glands and hormones they secrete. 

9th A Bio Work sheet

1.What are the different types of cutaneous receptors? State their foundation.

2. Describe nitrogen cycle.

3.Write about any four defects of the eye in detail.

4.What are the artificial causes of soil erosion? Suggest few measures to avoid soil erosion.

5.Define the terms

            (i) Biological magnification

            (ii) Ethology

6.Draw a neat labeled diagram of human eye

9th B Bio Worksheet

1. What is conditioning? Describe Ivan Pavlov’s experiments on conditional reflexes.       

 

2. Describe the structure of nerve cell with diagram.

3. Write a brief account of Parenchyma.     

4.Explain the structure of the bone with the help of a diagram.

5.  Differentiate three kinds of muscles in human body.

 6.Draw a neat labelled diagram  of inter structure of skin.    

6th class Bio work sheet

   1.  Describe the structure of tooth with the help of a diagram.

  2. Draw a neat labeled diagram of a flowering plant and describe the characteristics of angiosperms. 

   3. Write about classification of plants based on form.

   4. Describe digestion process taking place in duodenum.

   5. Write the flowchart of complete classification of animals.