class 7 worksheet on respiration

                              WORKSHEET CLASS -7

A. Tick the correct option.
1. Fermentation is caused by:
a. Cockroach b. Human beings
c. Earthworm d. Yeast
2. The blind air sacs of bronchiole are:
a. Alveoli b. Spiracles
c. Bronchi d. Epiglottis
3. The muscular flap which guards the opening of windpipe:
a. Diaphragm b. Epiglottis
c. Glottis d. Alveoli
4. Inhalation and Exhalation are components of:
a. Respiration b. Circulation
c. Transpiration d. Breathing
5. Organisms that live without oxygen :
a. Bacteria b. Plants
c. Cockroach d. Human beings
B. Match the animals with their respiratory organ.
Column A                                            Column B
i. Cockroach                                           a. Gills
ii. Earthworm                                         b. Lungs
iii. Fish                                                   c. Spiracles
iv. Amoeba                                            d. Moist skin
v. Human beings                                   e. Cell membrane


C. Fill the correct option:
i. __________ aerobic respiration/anaerobic respiration produces more energy.
ii. During exhalation, diaphragm __________ (relaxes/contracts).
iii. __________ (coughing/asthma) is an allergic disease.
iv. __________ (Gills/lungs) help the animals living in water to use the oxygen
dissolved in water.
v. Stomata help the plants __________ (to exchange gases/carries air to lungs).
D. Write ‘T’ for true and ‘F’ for false statement:
i. During inspiration, the ribcage moves upward and outward. ( )
ii. Breathing rate slows down during the time of exercise. ( )
iii. The thin walls of alveoli are richly supplied with blood. ( )
iv. During respiration, ADP is converted to ATP. ( )
v. In plants, all living cells take in oxygen independently and give
out carbon dioxide. ( )

class 8 worksheet force and pressure

WORKSHEET Class -8

Chapter 11
A. Tick the correct option.
1. Atmospheric pressure is measured with the help of a:
a. Barometer b. Thermometer
c. Hydrometer d. Anemometer
2. The pressure of liquids at different depths is measured by:
a. Barometer b. Hydrometer
c. Manometer d. Anemometer
3. Force per unit area is:
a. Buoyant b. Force
c. Pressure d. Thrust
4. Unit of pressure is:
a. Hz                     b. N
c. Pa                      d. Kg/m2
5. Pressure from atmospheric air is __________ kg per sq. cm.
a. One b. Two
c. Three d. Four
B. Fill in the blanks with the correct options:
i. Liquid pressure ______________ with depth (increases/decreases).
ii. 1 Pascal is equal to ______________ newton per square metre (one/two).
iii. Total force acting vertically on the surface of a body is ______________
(thrust/pressure).
iv. Air pressure ______________ as one goes higher and higher (increases/decreases).
v. Liquid pressure ______________ on the shape of the container
(depends/does not depend).

C. Match the following and write down the numbers of correct pairs.
Column A                                                 Column B
Instrument                                                   Function
i. Sphygmomanometer                    a. Atmospheric pressure             ii  Barometer                                   b. Liquid pressure                  
iii. Manometer                                c. Blood pressure 
iv. Pascal                                        d. Force per unit area 
v. Pressure                                      e. Unit of pressure 

A. Tick the correct option.
1. Which of the following is a contact force?
a. Gravitational b. Frictional
c. Magnetic d. Electrostatic
2. Which of the following forces helps in reducing air pollution?
a. Muscular b. Mechanical
c. Magnetic d. Electrostatic
3. The unit of measuring weight is:
a. Ka b. Pa
c. N d. g
4. The direction of the force of friction is always __________ to the direction of motion.
a. Parallel b. Perpendicular
c. Same d. Opposite
5. A spring balance is used to measure:
a. Weight b. Speed
c. Force d. Pressure
B. Fill in the blanks with the correct options:
Help Box: non-contact force, force, gravitational force, mass, push or pull
i. The amount of matter in a body is __________________
ii. Force which is applied without direct contact __________________
iii. Water flows downwards due to __________________
iv. Force could be a __________________ or a __________________
v. _________________ is responsible for the change in the state of motion of objects.
C. Match the following.
Column A                                                      Column B
i. Frictional Force           a. Fruit falling from a tree 
ii. Gravitational Force     b. Iron filings attracted 
iii. Magnetic Force         c. A child carrying school bag 
iv. Muscular Force         d. Shirt collar is torn 
v. Electrostatic Force     e. Bits of paper are raised 
D. Identify the force .
i. A man carrying a sac on his back. __________________________
ii. A woman squeezing a cloth. __________________________
iii. Fruit falling on the ground. __________________________
iv. A balloon stuck with the wall. __________________________

v. Iron nails attracted toward magnet. __________________________

CLASS 6 WORKSHEET

                                 SCIENCE              CLASS -6 
                             WORKSHEET
A. Give one word answer: 
1. Name a food that can be eaten raw. ________________
 2. What is the green pigment present in green plants called? ________________
 3. Which is the fastest mammal? ________________ 
4. What contains calcium and is good for our health? ________________
 5. What is the sugary liquid collected from plants by honeybees called? ________________
 B. Define the following:
 1. Food ___________________________________________________________________________________ ___________________________________________________________________________________ 
2. Sprouts ___________________________________________________________________________________ ___________________________________________________________________________________
3. Carnivore___________________________________________________________________________________ ___________________________________________________________________________________
 4. Food chain _________________________________________________________________________________ ___________________________________________________________________________________

 C. Differentiate between: 
1.Herbivore and omnivore______________________________________________
2. Edible and non-edible parts of a plant ______________________________________________________
 3. Autotrophs and heterotrophs ______________________________________________________
 E. Give reasons:
 1. All living things need energy. ______________________________________________________
2. Sprouts are good for health. ______________________________________________________
 3. We should drink milk everyday. ______________________________________________________

Deficiency of iodine causes anemia/goitre.
 3. Fruits and vegetables are protective/bodybuilding foods.
 4. Spinach is a good source of calcium/iron.
 5. Excessive loss of water causes dehydration/loss of vision. B. Write one or two words for each: 
1. The food which a person takes ________________
2. Diseases caused by lack of nutrients in our food ________________
 3. Chemical substances needed by our body for proper growth and functioning ________________
 4. Undigestible part of food stuffs ________________ 
5. The foods which protect our body against diseases ________________
 C. Complete the sentences:
 1. The popular dish kheer consists of _______________________________________________.
2. The main nutrients are carbohydrates, ____________________, _____________________, _____________________________________.
 3. Haemoglobin is a protein ______________________________________________________ 4. Hormones are chemicals ______________________________________________________ 5. All plants produce cellulose ______________________________________________________. D. Write one function of each of the following: 
1. Vitamin A - _______________________________________________________________.
 2. Vitamin B - _______________________________________________________________. 
3. Phosphorus - _______________________________________________________________. 
4. Calcium - _______________________________________________________________. 
5. Iron - _______________________________________________________________.
 E. Given below are some incorrect statements. Correct them and rewrite.
 1. Bleeding gums are symptoms of a disease called rickets. ______________________________________________________
 2. A single food can supply all the nutrients required by our body. ______________________________________________________
3. Protein energy malnutrition causes a disease called goitre. ______________________________________________________
4. Cellulose is a kind of protein. ______________________________________________________

class 7 worksheet on physical and chemical changes

                      SCIENCE      CLASS  -7

                             WORKSHEET
A. Tick  the correct option.
1. Dissolving the substance in a solvent is:
a. Synthesis b. Physical change
c. Chemical change d. Decomposition
2. Rusting of iron nail is a:
a. Chemical change b. Physical change
c. Temporary change d. Magnetic change
3. Which of these is a physical change?
a. Burning of a candle b. Rotting of fruit
c. Baking pancakes d. Water changing to ice
4. The process of coating zinc on iron article is:
a. Greasing b. Oiling
c. Galvanising d. Painting
5. The three states of matter are:
a. Solid, Gas, Sugar b. Sugar, Liquid, Gas
c. Salt, Liquid, Gas d. Solid, Liquid, Gas
B. Classify the following changes into physical and chemical change.
i. Bursting of cracker ______________________________
ii. Boiling of water ______________________________
iii. Photosynthesis ______________________________
iv. Respiration ______________________________
v. Inflation of balloon ______________________________

C. Match the following:
Column A                               Column B
i. Rusting                                a. Steel
ii. Neutralisation                     b. Smallest part of a substance
iii. Alloy                                  c. Moist air
iv. Solvent                               d. Acid + Base
v. Molecule                              e. Water
D. ANSWER THE FOLLOWING QUESTIONS

1. Why setting of curd and burning of the paper considered as chemical change? Explain.
2. What is crystallization?
3.  write the word equation for the following
a. Neutralization
b. Rusting of iron
c. Burning of magnesium.



                                WORKSHEET - RESPIRATION
A. Tick the correct option.
1. Fermentation is caused by:
a. Cockroach b. Human beings
c. Earthworm d. Yeast
2. The blind air sacs of bronchiole are:
a. Alveoli b. Spiracles
c. Bronchi d. Epiglottis
3. The muscular flap which guards the opening of windpipe:
a. Diaphragm b. Epiglottis
c. Glottis d. Alveoli
4. Inhalation and Exhalation are components of:
a. Respiration b. Circulation
c. Transpiration d. Breathing
5. Organisms that live without oxygen :
a. Bacteria b. Plants
c. Cockroach d. Human beings
B. Match the animals with their respiratory organ.
Column A Column B
i. Cockroach a. Gills
ii. Earthworm b. Lungs
iii. Fish c. Spiracles
iv. Amoeba d. Moist skin
v. Human beings e. Cell membrane

C. Fill the correct option:
i. __________ aerobic respiration/anaerobic respiration produces more energy.
ii. During exhalation, diaphragm __________ (relaxes/contracts).
iii. __________ (coughing/asthma) is an allergic disease.
iv. __________ (Gills/lungs) help the animals living in water to use the oxygen
dissolved in water.
v. Stomata help the plants __________ (to exchange gases/carries air to lungs).
D. Write ‘T’ for true and ‘F’ for false statement:
i. During inspiration, the ribcage moves upward and outward. ( )
ii. Breathing rate slows down during the time of exercise. ( )
iii. The thin walls of alveoli are richly supplied with blood. ( )
iv. During respiration, ADP is converted to ATP. ( )
v. In plants, all living cells take in oxygen independently and give
out carbon dioxide. ( )

CLASS 8 WORKSHEET

CROP PRODUCTION AND MANAGEMENT

WORKSHEET  SCIENCE  CLASS-8

A. Tick  the correct option.
1. The nitrogen deficiency of soil can be made up by using the principle of:
a. Mixed cropping          b. Crop rotation
c. Multiple cropping       d. Mono cropping
2. Neem leaves constitute:
a. Bio pesticide                 b. Compost
c. Green manure                d. Fertilizer
3. The rearing and caring of animals to obtain food on large scale is:
a. Agriculture               b. Poultry farming
c. Horticulture             d. Animal husbandry
4. Excess of nitrogen fertilizers increases the:
a. Acidity in the soil        b. Alkalinity in the soil
c. Basicity in the soil       d. Salinity in the soil
5. 2, 4-D is used to kill:
a. Pests                b. Insects
c. Rodents           d. Weeds
6. Amaranthus is a:
a. Weed            b. Kharif crop
c. Rabi crop     d. Pest
7. Jute bags, silos and granaries are used to store:
a. Fruits                b. Vegetables
c. Grains               d. Chaff
8. Separation of grains from the chaff:
a. Weeding           b. Threshing
c. Harvesting        d. Winnowing

B.  Fill in the blanks.

1. __________ ensures irrigation and distribution of minerals in the field.
2. The agricultural implement used to sow seeds is called __________.
3. __________ should be removed from the food grain just before its storage.
4. The process of scattering seeds manually is called __________.
5. The process of the plantation of paddy from the nursery in the field is called __________.
6. The process in which atmospheric nitrogen is converted into nitrogen compounds is
called __________ .
7. The tremendous increase in the production of food grains is known as __________.
8. __________ is the process of crossing two or more varieties of plants having the desired
genes to obtain a variety of maximum yield.
9. __________ are not nutrient specific.
10. The storage of grains on large scale is done in __________.

CELL :STRUCTURE AND FUNCTION

A. Tick  the correct option. 
1. The cell organelle involved in photosynthesis is:
 a. Mitochondria b. Chloroplast c. Vacuole d. Lysosome 
2. The outermost layer in the plant cell is:
 a. Cell Wall b. Cell Membrane c. Plasma Membrane d. Nuclear Membrane 
3. The basic structural and functional unit of life: 
a. Tissue b. Organ c. Cell d. Nucleus
 4. This cell is a branched cell:
 a. Muscle cell b. Nerve cell c. Skin cell d. White blood cells 
5. A device that is used to see the enlarged image of very small objects: 
a. Telescope b. Microscope c. Stethoscope d. Biscope 
 B. Write ‘T’ for true and ‘F’ for false statements:
 i. The structure of plant and animal cell is the same. ( )
 ii. Cell division is required for reproduction. (  )
 iii. A vacuole occupies most of the space in a mature plant cell. ( ) iv. A group of cells performing similar function is an organ. ( ) 
 v. Cell wall regulates the exit and entry of substances. ( )
  C. Give answers  as per the explanations: 
 i. Controlling centre of the cell _________________________________
 ii. Kitchen of the cell _________________________________ 
 iii. Power house of the cell _________________________________
 iv. Site of protein synthesis _________________________________
 v. Transports materials within the cell _________________________________ 
 D. Fill in the blanks with the correct word:
 i. __________ is responsible for passing the hereditary characters (Chloroplast/Chromosome).
 ii. Amoeba is a __________ (Multicellular/Unicellular). 
 iii. The central yellow part in hen’s egg is called __________ (Yolk/Albumin).
 iv. __________ traps the solar energy which is used by the plants for photosynthesis (Chlorophyll/Chloroplast). 
 v. __________ continue to divide throughout the life (Never cells/Skin cells).

class 8 worksheet on microorganism

                                   Chapter 2 WORKSHEET-2
A. Tick  the correct option.
1. The study of micro-organisms is known as:
a. Psychology b. Physiology
c. Microbiology d. Zoology
2. Which bacteria changes nitrogen of air into nitrate?
a. Bacillus b. Coccus
c. Spirillum d. Rhizobium
3. The micro-organism which is used in the manufacture of alcohol, wines, etc.
a. Bacteria b. Fungi
c. Algae d. Protozoa
4. Which of the following statement is not true about micro-organisms?
a. They feed and grow
b. They reproduce
c. They are found everywhere
d. They all are harmful
5. Which gas is produced due to fermentation of sugar by yeast cells?
a. Carbon dioxide b. Nitrogen
c. Oxygen d. Hydrogen
B. Match the following and write down the number of correct pairs.
a. Lactobacillus     i. Unicellular _____________
b. Protozoa            ii. Cilia _____________________
c. AIDS                iii. Fungi _____________________
d. Paramoecium   iv. Virus _____________________
e. Athlete’s foot   v. Bacteria _____________________

C. Use the clues to fill in the blanks:
a. Micro-organism which is on the border-line between living and non-living __________________
b. Disease causing micro-organisms ____________
c. Dr. Alexander Fleming discovered ____________
d. Malaria causing micro-organism ____________
e. Diseases caused by micro-organisms can be prevented by ____________
D. Name the micro-organisms responsible for these diseases:
Diseases                       Micro-organisms
a. Diarrhoea       ______________
b. Polio              ______________
c. Malaria          ______________
d. Typhoid        ______________
e. Ring worm  _______________

E. Identify the given micro-organism.Write one characteristic feature for each.
(a) (b) _________


(c)                     
                                          (d)_______________
 (e) ________