SCIENCE FA-III DEC 2014 CLASS VIII

JAWAHAR NAVODAYA VIDYALAYA ,YADGIR DIST

Class: Vlll                                                                                             M.Marks:50

Sub: Science/Physics                                                                                       Time:90 Min

MULTIPLE CHOICE QUESTIONS                     1 X3=3

1. What is light?

    a) A kind of energy              b) Sun             c) Sunlight       d) none of these

2. The passage of an electric current through a solution carries -------effect.

    a) Heating      b) Magnetic        c) Chemical       d) None of the above                           

3. Angle of incidence is equal to the angle of reflection.

    a)  Always           b) Sometimes             c) Under special conditions              d) Never

 ONE MARK QUESTIONS                                        1X2=2

4. What do you mean by electric current?

5. What is lateral inversion?

TWO MARKS QUESTIONS                                      2X3=6

6. What is the difference between cone cells and rod cells? Why owl can see at night?

7. What is reflection? Write laws of reflection with figure.

8. Draw a labeled sketch of human eye. How can you cure your eyes?

THREE MARKS QUESTIONS                                   3X3=9

9. Write full form of LED. What is its importance?

10. Is it safe for the electrician to carry out electrical repair outdoor during heavy downpour? Explain.

11. Does pure water conduct electricity? If not, what can we do to make it conducting?

FIVE MARKS QUESTIONS                                           5X1=5

11. What do you mean by electroplating? Explain with circuit diagram. Write any four uses of electroplating.

                                                     OR

    Write principle, construction and working of Kaleidoscope.

                                              SCIENCE

MULTIPLE CHOICE QUESTIONS                  1X4=4

1. An embryo continue to develop in

      a) Zygote       b) Foetus       c) Uterus         d) Ovary

2. Animals which lay eggs are called 

     a) Viviparous animals   b) Oviparous animals    c) Fertilization    d) None of these

3. Stoppage of menstruation is known as

    a) Menarche   b) Menopause   c) Puberty   d) All of these

4. The presence of iodine in water is necessary for the production of

    a) Adrenaline   b) Thyroxin    c) Both of the above   d) Insulin

ONE MARKS QUESTIONS                                              1X3 =3

5. Define puberty.

6. Mention the male & female reproductive organs of human beings.

7. What are endocrine glands?

TWO MARKS QUESTIONS                                                2X2=4

8. Differentiate between internal and external fertilization?

9. What are the measures taken for the personal hygiene in adolescence period?

 THREE MARKS QUESTIONS                                             3X3=9

10. Describes the process of binary fission.

11. Briefly explain the development of embryo.

12. Explain briefly the determination of sex in unborn baby.

FIVE MARKS QUESTIONS                                                    5X1=5

13. Explain the characteristics of adolescence period.