Class 9 Science Sample Paper (Term 1) - 2 (with solutions): Part - 2 | Extra Documents & Tests for Class 9 PDF Download

Ques 24: Differentiate between mass of an object and its weight.
Ans: Mass: Amount of matter in a body. Measured by physical balance. SI unit is kilogram. Constant at all the places in universe.
Weight: Force of gravity acting on a body. Measured by spring balance. SI unit is Newton. Variable and changes with the change in acceleration due to gravity.

Ques 25: If the earth attracts an apple, does the apple also attract the earth? If so, why does the earth not move towards the apple?
Ans: Yes, the apple attracts the earth with the same force as the forces with which earth attracts the apple. But due to large mass of earth, the acceleration produced in it is negligible so unnoticeable. Thus, earth does not seem to move towards the apple.

Ques 26: Name the following.
(i) Tissue present in brain
(ii) Tissue forms inner lining of mouth
(iii) Tissue that present in skin
(iv) Tissue that transport food in plants
(v) Tissue that connect muscle to bone in humans
(vi) Tissue present in lining of kidney tubule
Ans:
(i) Nervous tissue
(ii) Epithelial tissue
(iii) Squamous epithelium tissue
(iv) Phloem
(v) Tendon
(vi) Cuboidal epithelium

Ques 27: Draw neat and well labelled diagram of prokaryotic cell.
Ans:


Ques 28: (i) What is the function of blood?
(ii) Name three types of blood cell and give their function.
Ans:(i) Blood is a carrier of oxygen and food to all cells of the body. It also collect waste from all parts of the body and carries them to liver and kidney for disposal.
(ii) Three types of blood cells are White Blood Cells (WBCs), Red Blood Cells (RBCs), Platelets.
Functions:
(a) RBCs transport respiratory gases, oxygen and carbon dioxide.
(b) WBCs fight with diseases by producing antibodies and engulfing the germs.
(c) Blood platelets helps in clotting of blood.

Ques 29: What is crop rotation? Enumerate some difference between mixed cropping and inter cropping.
Ans: Crop rotation: The growing of different crops on a piece of land in a pre-planned succession is known as crop rotation."
Mixed Cropping: Seeds of two crops are mixed before sowing. It involves no set pattern of rows of crops. It has a target to minimize the risk of crop failure.   Harvesting and threshing of crops separately not possible. 
Inter Cropping: Seeds of two crops are not mixed. It involves set patterns of rows of crops. It has target to increase productivity per unit area. Both crops are easily harvested and threshed separately.

Ques 30: (i) Name the month during which kharif crop is grown.
(ii) List any four factors, which crop variety improvement has done.
Ans: (i) Kharif crops is grown during the month from June to October.
(ii) Four factors for which crop variety improvement is done are as follows.
(a) Higher yield To increase the productivity of crop per acre.
(b) Improved quality N Quality consideration such as baking quality, protein quality, oil quality and preserving quality of crop products vary from product crop to crop.
(c) Biotic - abiotic resistance N Crop on production can go down due to bioric and abioric stresses under different situations.
(d) Change in maturity duration N The shorter the duration of the crop from sowing to harvesting, the more economical is the variety.

Ques 31: Taking one example, show the experiment of process of sublimation.
OR
(i) Define boiling point.
(ii) Express the boiling point of water in Celsius as well as well as Kelvin scale.
(iii) How will you show the presence of water vapors in air?
(iv) Give the full forms of (a) LPG (b) CNG.
(v) Why evaporation is called surface phenomenon?
Ans: Put an inverted funnel over the China dish. 
Cover the steam of funnel by a cotton plug. Now heat the dish slowly. Observation Ammonium chloride change its state from solid to vapours directly without going through liquid state. Inference The change of state directly from solid to gas without changing in liquid state (or vice versa) is called  sublimation.

OR 
(i) Boiling point of a liquid is that fixed temperature at which that liquid changes into gaseous state rapidly.
(ii) Boiling point of water is 100° C or 373° K.
(iii) Anhydrous calcium chloride turns wet on keeping exposed to air. 
(iv) (a) LPG Liquefied Petroleum Gas (b) CNG Compressed Natural Gas
(v) Since evaporation occurs only from the surface of liquid.

Ques 32: Describe the different kind of irrigation systems adopted in India. OR Enumerate some differences between.
(i) inland fishery and marine fishery.
(ii) broilers and layers.
(iii) spraying and fumigation.
Ans: The irrigation system are:
(i) Wells They are of two types:
(a) Dug well In this type of well, water is collected from water bearing strata.
(b) Tubewell In this type of well, water is lifted by pumps from deeper strata for irrigation.
(ii) Canals In this systems, canals receives water from one or more reservoirs or from rivers. The main branch is divided into branch canals with many distributaries to irrigate fields.
(iii)River lift system Most common in areas, where canal flow is irregular or insufficient due to less numbers of reservoirs release. In lift system water is directly drawn from rivers for irrigation in areas near  to rivers.
(iv)Tanks These  are  small  storage  reservoirs intercepting and storing the run-off of smaller catchment areas.

OR
(i) Differences between Inland and Marine Fishery 

(ii) It is the method to rear domestic fowl for production of eggs and meat. Poultry farming aims at improving poultry breeds. Fowl producing eggs are called layers. Fowl producing meat are called broilers.
(iii) The proper storage of grains can be done by proper treatment and by systematic management of wore houses. It includes cleaning, proper drying, fumigation, spraying etc. Fumigation is the process of providing chemical fumes of the pestes for their control in the storage site while spraying is the method of providing chemical directly to the storage material.

Ques 33: Write two differences between the muscles present in the heart and the limbs of man. Also draw labeled diagram of these two kinds of muscles.
Ans: Muscles present in heart is cardiac muscles and that present in limbs is voluntary or striated muscles.
- Striated Muscles

It is arranged in bundles, Its ends are blunt. 

- Cardiac Muscies

It is arranged in network. Its ends are flat and zig-zag.