CBSE Board Class 8 Science Sample Papers 2009

 SAMPLE PAPER 2009

CLASS 8 SCIENCE
-----------------------------------------------------------
1. An archer stretches her bow while taking aim at the target. She then releases thearrow, which begins to move towards the target. Based on this information fill up thegaps in the following statements using the following terms.
Muscular, contact, non-contact, gravity, friction, shape, attraction
A.To stretch the bow, the archer applies a force that causes a change inits_______________..

B.The force applied by the archer to stretch the bow is an example of __________force..

C.The type of force responsible for a change in the state of motion of the arrow is anexample of a ___________ force..

D.The type of force responsible for a change in the state of motion of arrow is anexample of a ______________ force..

E.While the arrow moves towards its target, the forces acting on it are due to __________ and that due to ___________ of air.
2. Give one word answer)

A.Separation of grains from the chaff.

B.Black gold

C.Slow process of conversion of dead vegetation into coal.

D.Process of separating the various constituents/ fraction of petroleum.

E.Part of the cell that contains organelles.

3. Tick true / false against the following statements

A.Coke is almost pure form of carbon.

B.Fuel efficiency is expressed in units of kg/ kilojoules.

C.Increased percentage of CO2

D.in air has been linked to global warming.

E.Force has magnitude only.


4. Answer the following:a)

1.What is the term used for secretion of endocrine glands responsible for changestaking place in the body?b)

2.Name the plastic used for non stick coating of the cookware.c)

3.What are the advantages of using LPG as fuel?d)

4.Why fossil fuels are exhaustible natural resources?e)

SECTION-B 10X2=20

6. What will happen if a farmer stores the harvested grains without drying themproperly?

7. Fill in the blocks given below:HUMAN DISEASE CAUSATIVE MICROBE MODE OF TRANSMISSIONHepatitis B ---------- -----------Malaria --------- -----------

8. Jams, jellies and squashes are preserved by sugar. Why?

9. Distinguish between thermosetting and thermoplastics with examples.

10. Why do people consider plastics as ‘Material of choice’?

11. Why it is not advisable to store lemon pickle in aluminium containers?

12. Write one important use of the following substances:
Coke, Bitumen, CNG, and Paraffin Wax.

13. In an experiment 4.5 kg of a fuel was completely burnt. The heat produced wasmeasured to be 180,000 KJ. Calculate the calorific value of the fuel.

14. Give two differences between eukaryotes and prokaryotes.

15. A rocket has been fired upwards to launch a satellite in its orbit. Name the two forcesacting on the rocket immediately after leaving the launching pad

16.  What is metamorphosis?

17.  List the changesthat occur in tadpole during this process.

18.  How does the following reproduce?

a.     Amoeba

b.    Hydra

19.  What is the special name the period of life between childhood and adulthood?

20.  List the changes that take place during puberty to

A)    Both boys and girlsB)Boys onlyC)Girls only

21.  What changes in the voice of boy takes place when they reach puberty? What is the of cause of this change?

22.  State 2 ways in which body shapes changes during puberty

a.     In boys

b.    In girls

23.  State 2 secondary sexual characteristics

a.     In boys

b.    In girls

24.  Who is responsible for the sex of unborn child? Father or Mother? Why?

25.  Define:

a.Menarche

b.Menopause