Class 9 Science Half Yearly Test paper

1. Density                   
   
2. volume                       
   
3. compressibility
   

1. The acceleration of car
   

2. The distance covered by the car in that time.
   

11- State Newton’s 1st law of motion? Why is it called as law of inertia? On what factors does inertia depends? Does inertia play any role for an object moving on a frictionless surface with uniform speed? Justify your answer.

12- Distinguish between mass and weight of an object. How does weight of an object change on moving from equator to poles? When can the weight of an object be zero?

13- State Newton’s third law. Are the forces mentioned in the law balanced forces why? Will they always produce acceleration of equal magnitude? Why?

14- A stone is released from top of a tower of height 44.1 m. With what velocity and in how much time does it reach the earth? (g = 9.8m/s²).

15- A) Draw labelled diagram of striated muscles.

B) Mention any two characteristics features of the cells that form the above muscular tissue.

16- List the specific functions of the following:

Rough Endoplasmic Reticulum

Golgi apparatus

Lysosomes

Mitochondria

Plastids

Vacuoles in unicellular organism

     17

a) list two characteristics each of roughage and concentrate in relation to animal feed. Give one example of each.

b) Which method is commonly used for improving cattle breeds?

18- Distinguish between intercropping and mixed cropping. List any two advantages of intercropping over mixed cropping.

19- What is a colloidal solution? How is it different from a true solution? Describe a method to separate the components of a mixture of iron filings, ammonium chloride and sand.

OR

Write two differences between colloids and suspensions. With the help of a labeled diagram describe a method of separating a mixture containing petrol and kerosene (difference in their boiling point is more than 25*C), which are mixicible with each other.

20- List three characteristics of particles of matter. Describe one example for each characteristic of illustrate it. Name the characteristics which are responsible for (a) spreading of smell of scent in a room and (b) water taking shape of the vessel in which poured.

21- Define inertia. There are three solid balls, made up of aluminum, steel and wood of same shape and volume. Which of them would have highest inertia? Why?

22-

1. Describe in brief an activity to illustrate the property of inertia of rest.
   

   OR
   

1. Using Newton’s law of motion, derive the relation between force and acceleration.
   

2. Define one Newton.
   

3. Which would require a greater force to accelerate a ½ kg mass at 5 m/s² or a 4 kg mass at 2 m/s²? Give reason.
   

23-

1. Draw the shape of velocity- time graph of a uniformly accelerated motion of a body
   
2. Derive the velocity- position equation of motion
   (v²=u²+2aS) graphically (with the help of a velocity- time graph).
   

                                           OR
   

a) Draw graph for the following cases:                           
i) When the object is at rest
ii) when the object is thrown vertically upwards
b) A motorcyclist riding motorcycle A who is travelling at 36 km/h applies the brakes and stops the motorcycle in 10 s. Another motorcyclist of motorcycle B who is travelling at 18 km/h applies the breaks and stops the motorcycle in 20s. Plot speed-time graph for the two motorcycles. Which of the two motorcycles traveled farther before it comes to a stop?

24-

1. What are the two ways by which we can obtain fish for our food? Explain. How is culture of Pomphret and Mackeral different from that of Catla and Rohu?
   
2. Give an example each for
   

1. Fresh water prawn
   
2. Marine water prawn
   

   OR
   

b) List any four methods for controlling and preventing the growth of such plants.

SECTION B

 
25- To prepare a colloidal solution of starch we should:

1. Add starch powder to boiling water and cool
   
2. Add starch powder to cold water and boil
   
3. Heat starch powder, add it to the cold water and then bring to boil
   
4.  Add a thin paste of starch to boiling water while stirring.
    
   

1. True solution
   
2. Suspension
   
3. Colloidal solution
   
4. Emulsion
   

1. Particles of  sulphur dissolve
   
2. Particles of iron dissolve
   
3. Grey black product dissolves
   
4. No change takes place
   

1. Blue
   
2. Black
   
3. Silverfish
   
4. Green
   

1. Temperature keeps increasing
   
2. Temperature keeps decreasing
   
3. Temperature increases first and then decreases
   
4. Temperature first decreases and then remains constant at 0*C.
   

1. Tap water
   
2. Distilled water
   
3. Salt water
   
4. Sugar water
   

1. Sublimation, evaporation, adding water, filtration
   
2. Sublimation, adding water, filtration, evaporation
   
3. Evaporation, sublimation, adding water, filtration
   
4. Evaporation, adding water, filtration, sublimation
   

1.  Similar
   
2. Slightly similar
   
3. Different
   
4. Both (b) and (c)
   

1. White                                        
   
2. Black
   
3. Blue
   
4. Brown
   

1. Filter paper
   
2. Glass funnel
   
3. Thermometer
   
4. Petri dish
   

1. 20%
   
2. 30%
   
3. 60%
   
4. 40%
   

1. Rectangular cells
   
2. Irregular shaped flat cells
   
3. Presence of a large vacuole
   
4. Presence of a single wall
    
   If the slide was of the onion peel it will show:
   

•  (i) and (iii)
  
• (ii) and (iii)
  
•  (ii) and (iv)
   
  37- Arhar dal becomes dark yellow due to adulterant:
  

1. Metanil yellow
   

2. Turmeric
   

3. Itching yellow
   

4. Hyena blue
   

5. Malachite green
   

 
38- Meenu was trying to test the presence of starch in potato tuber. She forgot the reagent with which the starch gives blue colour. Help her to select the correct reagent from the following:
a) Safranin
b) Methylene blue
c) Iodine
d) Eosin
 
39- Which one of the following is the correct step, in the procedure for making a temporary slide of human cheek cell?
a) Place the cheek cell scrapings in a watch glass containing water.
b) Place cheek cell scrapings in the centre of a clean slide.
c) Dip the tooth pick containing cheek cell scraping in the stain and then transfer to a clean slide.
d) Obtain cheek cells directly in the slide using its edge to scrap the inside of the cheek.
 41- Raisins swell up after being placed them in beaker containing water for       some time because

1. Water inside the raisins exits when placed in a beaker of water.
   
2. The concentration of water in the cell sap is the same as that of water in the beaker.
   
3. The concentration of water in the cellsap in higher than the water in the beaker.
   
4. The concentration of water in the cell sap is lesser than that of water in the beaker.
   

1. Nuclei lying towards the periphery
   
2. Star like structure
   
3. Cells with tapering ends
   
4. Centered nuclei