Science

CBSE Class IX | Important Question Science_ Biology

Q. 1. Give the function of Leucoplast in plants.(1)

Q. 2. Give one function of SER and RER each. (1)

Q. 3. Which epithelial tissue is found in surfaces where absorption and secretion occurs.(1)

Q. 4. Draw a neat labeled diagram of any type of complex tissue in Plants.(2)

Q. 5. Give hierarchy of classification. Who gave five kingdom classification.(2)

Q. 6. Differentiate Thallophyta and Bryophyta. Give one example each.(2)

Q. 7. What is the difference between tendon and ligament.(2)

Q. 8. What is a nucleoid. Which type of cell have it. List their one structural feature too which differentiate them from animal cells.(3)

Q. 9. Compare three types of muscle fibres structurally and functionally.(3)

Q. 10. What is the difference between Meristematic and Permanent tissue. Show the location of various types of Meristematic tissues via schematic diagram.(3)

Q. 11. Name a eukaryotic unicellular organism. Also name the kingdom it belongs to and what is its mode of nutrition.(2)

CBSE Class IX | Important Question Science_ Motion

Q. 1. When the passenger m oving in a bus , the road side trees appear to b e moving ---------------------------------- (a) Back ward (b)For ward

Q. 2. In uniform motion the object covers ------------ (a) equel distance (b) un equal distance

Q. 3. Where objects cover un equal distances in equal interval of time then the motion is called ---------------- (a) uniform motion (b) non uniform motion

Q. 4. The average speed = =A car accelerate = (a) Total time taken /total distance traveled (b) Total distance traveled/total time taken

Q. 5. v = (a) t/s (b) s/t

Q. 6. An object travels 16m in 4sec and another 16 m in 2 sec. what is the average speed of the object----------- (a) 5.33 ms-1 (b) 5. 34 ms-1

Q. 7. If we specify , its direction of motion along with its speed , the quantity that specifies with the aspects is called------------- (a) velocity (b) motion

Q. 8. Automobiles are fitted with a device that show the distance traveled . such a device is known ---------- (a) odometer (b) Speedo meter

Q. 9. The velocity of an object can be -------------- (a) non uniform or variable (b) uniform or variable

Q. 10. Average velocity = (a) initial velocity + final velocity/ 2 (b) initial velocity + final velocity/1

Q. 11. Average velocity = (a) placement/ total time taken (b) Displacement/ total time taken

Q. 12. Acceleration = (a) change in velocity/ time taken (b) change in motion / time

CBSE Class IX | Important Question Science

Q. 1. Give the abbreviation for M easels, Mumps & Rubella------------ (a) MMR (B) RMR

Q. 2. What do you mea y DPT -------- (A) pertusis Diphtheria  (b) Diptheria pertusis (c)  Diphtheria pertusis

Q. 3. The role of immune system& hygiene related habits play a ---------- (a) Minor role in determine  the
person’s health   (b) Major role in determine the person’s health

Q. 4. Tuberculosis, pneumonia, spread through ------------ (a) Air    (b) water

Q. 5. Cholera is a -------------------------------------------(a) Air born disease   (b) water born disease

Q. 6. AIDS can spread via blood to blood contact during ------------ (a) Blood transfusion (b) Pregnancy
(c)     Blood transfusion & Pregnancy both

Q. 7. Vectors deaseses spread by --------  (a)  Plat  (b)  Animal

Q. 8. Jaundice spread ----------------------- (a) Rapidly  (b) Slowly

Q. 9. Health is related to --------- (a) Society  (b)  Community   (c)  Society & community both

Q. 10. Peptic ulcers is a diseases of ------------ (a) Intestine    (b) Stomach

Q. 11. Marshall& Warren received the Nobel prize for Physiology and Medicine ------------ (a) 2006
(b) 2005 (c)  2007

Q. 12. Leishmania Protozoa organism that causes the deases-------------- (a) Kala-aZar    (b) Malaria 

CBSE Class IX | Important Question Science _ Chemistry

Q. 1. Write the chemical formula of (a) calcium nitrate (b) ferric oxide?

Q. 2. Write electronic configuration of fluorine and potassium.

Q. 3. Write the names of Mg(HCO3)2 and Ba3(PO4)2.

Q. 4. What are cathode rays?

Q. 5. Calculate the maximum no. of electrons that can be present in the 3rd orbit of an atom?

Q. 6. Why are He, Ne and Ar called inert gases?

Q. 7. A naturally occurring sample of lithium contains 7.42% of 6Li and 92.58% of 7Li. Calculate the atomic mass of a naturally occurring sample of lithium.

Q. 8. Define atomicity? What are diatomic molecules? Give two examples.

Q. 9. What are isotopes? Give one example. Write two applications of isotopes.

Q. 10. The molecular mass of H2SO4 is 98 u. Calculate the number of moles of each element in 294 g of H2SO4.

Q. 11.

  1. What is the mass of 10 moles of Na2SO3?
  2. How many moles of Cr are there in 85g of Cr2S3? (Cr = 52)

Q. 12. Describe Rutherford’s α-ray scattering experiment and mention observations and conclusions derived from it. Cite one main defect of the Rutherford’s atomic model.

 

Q. 13. Give one example of emulsion and foam.(1)

Q. 14. What is solubility. Give its units.(1)

CBSE Class IX | Important Question Science _ Physics

Q. 1. Write the chemical formula of (a) calcium nitrate (b) ferric oxide?
Q. 2. Write electronic configuration of fluorine and potassium.
Q. 3. Write the names of Mg(HCO3)2 and Ba3(PO4)2.
Q. 4. What are cathode rays?
Q. 5. Calculate the maximum no. of electrons that can be present in the 3rd orbit of an atom?
Q. 6. Why are He, Ne and Ar called inert gases?
Q. 7. A naturally occurring sample of lithium contains 7.42% of 6Li and 92.58% of 7Li. Calculate the atomic mass of a naturally occurring sample of lithium.
Q. 8. Define atomicity? What are diatomic molecules? Give two examples.
Q. 9. What are isotopes? Give one example. Write two applications of isotopes.
Q. 10. The molecular mass of H2SO4 is 98 u. Calculate the number of moles of each element in 294 g of H2SO4.
Q. 11.

  1. What is the mass of 10 moles of Na2SO3?
  2. How many moles of Cr are there in 85g of Cr2S3? (Cr = 52)

Q. 12. Describe Rutherford’s α-ray scattering experiment and mention observations and conclusions derived from it. Cite one main defect of the Rutherford’s atomic model.
 
Q . 13. Define SI unit of force.(1)

Science CBSE ix Chapter 10 - Gravitation- Answer of question on Page 136 Q1

What do you mean by free fall?

Gravity of the Earth attracts every object towards its centre. When an object is released from a height, it falls towards the surface of the Earth under the influence of gravitational force. The motion of the object is said to have free fall.

 

 

Science CBSE ix Chapter 10 - Gravitation- Answer of question on Page 134 Q2

Question 2:

Write the formula to find the magnitude of the gravitational force between the earth and an object on the surface of the earth.

Ans: Let F be the gravitational force acting on a body of mass m, then it can be given by,

 
 
 
 
 
 

From the above eqations we can see that F α m, although g (acceleration due to gravity) does not depend on m. Hence, all bodies fall with the same acceleration provided there is no air or other resistance.

Science CBSE ix Chapter 10 - Gravitation- Answer of question on Page 134 Q1

Question 1:

State the universal law of gravitation

Ans: According to the law of gravitation, the force of attraction acting between two bodies is given by,

 
 
 
 
 
 
 
 
 

Thus, when the distance between the objects is reduced to half the gravitational force increases by four times the original force.    

Science CBSE ix Chapter 13 - Why Do We Fall Ill - Answer of question on Page 178 Q3

Question 3:

Are the answers to the above questions necessarily the same or different? Why?

Answer

No. The answers to the above questions may not necessarily be the same. This is because a disease free state is not the same as being healthy. Good health is the ability of an individual to realise his or her full potential. Individuals can have poor health without having any identifiable disease. Also, health is related to society and community, whereas having a disease is about an individual sick person. Hence, the conditions for good health and for being disease free can be same or even different.

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