Wednesday, 16 May 2018


Army Public School Damana
Holidays homework (Session 2018-19)

Science Assignment                                                                             Class X

1.       Draw the Memory Enhance Map &Chapter at a glance of the Chapter Reflection and Refraction of light , Sources of Energy,  Metals and non- metals , Acids, Bases and Salts, Management of Natural Resources, Our Environment.
2.       Practise the ray diagrams of spherical Mirrors  and Spherical Lenses , Equations of Metals and non metals and diagrams of biology heart, respiratory system, nephrons, alimentary canal, Excretory system.
3.       Working Project  allotted on countries Renewable Energy Resources along with the research files  on the given format.
4.       Solve atleast 5 numericals on spherical mirrors and 5 on spherical lenses.
5.       Find out hazardous materials have to be dealt with while disposing of electronic items. How would these materials affect the environment?
6.       Prepare an article/ report on Importance of Ozone and consequences & causes of Depletion of Ozone layer.
7.       Find out how plastics are recycled? Does the recycling process have any impact on the environment.
8.       What are the nuclear wastes? How they can be disposed off?
9.       You must have heard of the Euro I & Euro II norms for emission from vehicles. Find out how these norms works towards reducing air pollution.
10.   Revise the syllabus of PTI

Assignment I Class X 2018-19

Q1. Which is a converging mirror: convex or a concave mirror?
Q2. What is a relation between focal length and radius of curvature of a convex mirror?
Q3. What is the formula for linear magnification of a spherical mirror?
Q4. What is the angle of incidence when a ray falls normally on a mirror?
Q5. What is a mirror formula?
Q6. Out of convex and concave mirror, the magnification of which mirror is always positive?
Q7. The magnification of a concave mirror is -1. What is the position of the object?
Q8. Which colour of light travels fastest in vacuum?
Q9. When light goes from one medium to another, which of the three parameters frequency, 
        wavelength, velocity change?
Q10.  Refractive index of glass w.r.t. air is 3/2 and refractive index of water w. r. t. air is 4/3. What is 
         refractive index of glass w.r.t. water?
Q11. What is the speed of light in water of refractive index 4/3?
Q12. Light travels in a medium with a velocity of 2x 108 m/s. what is refractive index of the medium?
Q13. Refractive index of diamond w.r.t. glass is 1.6 and absolute refractive index of glass is 1.5. Find out 
         the absolute refractive index of diamond.
Q14. On what factor does the focal length of a spherical mirror depend?
Q15. Why light refracts?
Q16. How does light bend while travelling from denser to rarer medium?
Q17. What are the units of refractive index?