DAV SCIENCE CLASS V

Observing the night sky D1.Why do we usually not see the stars during the day? Ans:We do not see stars during day time because sun is very close to  earth that other  stars. sun light dominate the lights of other stars ,so we  do not  see stars during the day time. D2.In which part of the sky are we likely to find Venus when it is visible as evening star? Ans:We usually find Venus in very low near the horizon in the sky. D3.State the causes of the apparent motion of the sun from east to west? Ans:The apparent movement of sun from east to west is due to the rotation of earth on its axis from  west to east. D4.Name the special star in the northern hemisphere .Why  has it been useful for travelers? Ans: Pole star is the special star of northern hemisphere. It remain along the axis of  earth and do not change its position due to rotation of earth. It always pointed north direction, So it is very helpful for traveler to determine the direc...

Our Solar System D1.Name the hottest planet in our solar system.Is it closest to the sun? Ans: Venus is the hottest planet in our solar system.No venus is not the closest planet to sun. D2.How much time does the earth take to (i)                             Revolve once around the sun (ii)                           to complete one rotation about its own axis. Ans;(i) earth takes  365 days and 6 hours to revolve once around the sun. (ii)Earth takes 23 hours 56 minutes to complete one rotation about  its own axis. D3.State the nature of the shape of orbit of planets. Ans;The shape of orbit of planets is elliptical. D4.Write  the meaning  of the Artificial satellites. Ans:Artificial satellit...

DAV PUBLIC SCHOOL,CSPU,BBSR-21 TOPIC :SOLAR SYSTEM&OBSERVING THE SKY Name :                                       Section:        Roll No: Q1. 1-The following is (are) example(s) of celestial body (ies). i)Sun        ii)Moon iii)Stars          iv)All of the above 2-The following is (are) true about Sun. i)It is made up of gases                ii)It has its own heat and light iii)Sun is a star                             iv)All of the above 3-The differen...

DAV PUBLIC SCHOOL ,CHANDRASEKHARPUR ,BBSR-21 WORKSHEET-    10                            CLASS V            CHAPTER:AIR Name:............................................ Section:..........................Roll No.................. A. Choose the most appropriate answer i) Name the gas which helps in burning. a)Hydrogen        b)Nitrogen          c)Oxygen             d)Carbon dioxide ii) Name the gas which burn itself a)Hydrogen        b)Nitrogen          c)Oxygen             d)Carbon dioxide iii...