Extra questions (6th class)_

Write down these questions in your note book as i have explained to you
Q1. Smallest structural and functional unit of life - Cell

Q2. From where the process of digestion begins and what is it's another name - Mouth( Oral Cavity )

Q3. The visible part of the teeth - Crown

Q4. Hardest substance in the body - Enamel

Q5. Last pair of molar teeth - Wisdom Teeth

Q6. Tiny lumps present on the tongue which help to taste - Taste Buds

Q7. Number of salivary glands present in our mouth- 3 Pairs

Q8. Salivary produced by an adult in 1 day - 1 Liter

Q9. Another name of food pipe - oesophagus

Q10. Connecting tube between mouth and stomach -oesophagus

Q11. An organ which has bag like structure - Stomach

Q12. Juices secreted by stomach - Gastric Juice

Q13. Largest gland of the body - Liver

Q14. Brownish-Green fluid secreted by liver - Bile Juice

Q15. Juice secreted by pancreas - Pancreatic Juice

Q16. Longest part of digestive system - Small Intestine

Q17. Where does the bile juice and the pancreatic juice mixed with food -Small intestine

Q18. Where does the absorption of nutrients take place - Small Intestine

Q19. Where does the absorption of water take place from undigested food - Large Intestine

Q20. External opening through which undigested food is eliminated from the body - Anus

Q21. Organ which produces sound and known as sound box - Larynx

Q22. Where does the exchange of air takes place in lungs - Blood Vessels And Air Sacks

Q23. Who carry the oxygen to different parts of the body - Blood

Q24. On which side of the heart pure blood flows - Left Side

Q25. Number of chambers in human heart - 4 Chambers

Q26. The membrane which separates the left and right side of the heart - Septum

Q27. A substance in the blood which gives red colour to the blood - Hemoglobin

Q28. Number of types of blood groups in humans - 4

Q29. Universal donor blood groups in humans - 0

Q30. Universal recipient blood groups - AB

Q31.Average heart beat - 72 Times Per Minute

Q32. Heart beat of new born - 140 Times Per Minute

Q33. Master of body - Brain

Q34. Largest part of brain - Cerebrum

Q35. Part of the brain which controls motor activity - Cerebellum

Q36. Part of the brain which controls involuntary action - Medulla

Q37. Why we should not toss food into mouth directly?

A37. This may choke our wind pipe.

International essay writing competition

Hurry Up Students!!!
Tommorow i.e 31 st October 2013 is the last date for submission of International essay writing competition

International essay writing competition

All the students are asked to show the first copy of their script  to me on  Monday i.e.  28th  October

 

Topic- What does sustainable living mean to you?(400 words)

 

6th class

download paste and draw also
tuman tongue

6th class -kind attention

download and paste

 

Objective:-(1)To prepare a temporary mount of onion cells,(2)to record observations and draw labelled diagrams

Materials Required:-
Onion Knife,Forceps,Blade,Slides,Watch glass ,cover slip,brush,
compound microscope,blotting paper,
Safranine ,Glycerine and water.

Procedure:-
(1)Take a piece of onion scale and bend it until it breaks into two.When it breaks,you will notice that a thin membranous structure still connecting the two bits.This membranous structure is called onion peel .

(3)take some water in a watch glass and put the epidermis in it.Make certain that it is not folded or rolled.

(4)Add 1-2 drops of Iodine solution or Safranine solution.

(5)After about 2-3 minutes take the peel and wash in acid water if Iodine solution is used or in plain water If safranine is used.

(6)Take a clean glass slide and put a drop of glycerine almost in the middle of the slide.

(7)Place the stained piece of the peel in the glycerine and put a cover slip on it.

(8)Soak the overflowing fluid from the corners of the coverslip with the help of the blotting paper and clean the side.

(9)Observe the wet mount under the  microscope .

(10)Draw the diagram of the peel and label .

Observations:-

(1)Under Low power of te microscope

1.The rectangular cells of onion  are seen.The regularly arranged components like cells have clear outline.

2.A deeply coloured,round body is seen in side every cell.This is known as Nucleus.

Precautions- Too much of stain should not be used .
      Microscope should be handled carefully.

Vivekanand contest

All the  students are requested to read the book -The life and teachings of Swami Vivekanand online through the website         www. awakening       india .org for the forthcoming 
Vivekanand contest
 to be held on 13th August i.e. tuesday in the zero period.

Value based question

-In  Pitam  pura  market  ,kareena,katreena and priyanka go for shopping of grocery items .They find that the shopkeeper mixes harmful and cheap substances with th food items like white stones with rice ,papaya seeds with black pepper and brick powder with red chilies .
Answer the following questions
Q1  What is the name of this malpractice?
Answer- Food Adulteration.

Q2   What can the reason for such a practice?
Answer- To earn more profit .

Q3  Do you think the shopkeeper is doing the right thing? give reasons?

answer-This is really a bad practice because it can cause serious health problems and also we are paying more for poor quality food .

Question4- What steps should be taken to stop adsulteration/

Answer-1 We should buy things from reliabl;e shops .
2  We must buy packed food and read the instructions given on the wrapper.
3 We must report if we find any adulteration.

Assignment 2 on chapter separation of substances

Question 1
Suggest ways to separate a mixture of

(a) camphor,sand and salt.
Answer- steps
1 Sublimation
2 filtration
3 evaporation


(b) Saw dust, common salt and iron nails
steps
1 magnetic separation
2 filtration
3 evaporation

(c)ammonium chloride ,common salt and chalk powder

Steps
1 sublimation
2  filtration
3 evaporation

Question 2 Define Adulteration,harvesting and Evaporation

Answer- Adulteration Mixing harmful and cheap substances with the pure
substance to gain more profit is called adulteration.

Harvesting-The process of cutting and collecting the ripened crop is called harvesting.

Evaporation-The process in which liquid changes into gaseous state
on heating is called evaporation.

Assignment -chapter Separation of substances

Q- How can you separate the mixture of iodine and sand?  Explain and draw the diagram also.

Answer1-  Take a mixture of sand and iodine in a china dish .
Cover it with an inverted funnel whose narrow end is closed with cotton wool.
Heat the china dish on a wire gauge.

Observation-We observe that on heating iodine sublimates and changes into vapor and rises up.
On coming in contact with walls of funnel it cools down and changes back into solid state
 and sticks to the walls of the funnel and is left behind in the cotton of the funnel.
Result=  Sand and iodine are separated from each other by the process of sublimation.




Question 2   Write an activity to separate mustard oil and water ?Draw the diagram .

Answer 2    
Aim-To separate mustard oil and water.
Material required-Separating funnel, water ,mustard oil, stopcock,beaker and stand.

Procedure-Pour the mixture of water and oil into separating funnel .
  Let it stand for sometime so that separate layers of water and oil  are formed.
Put the stop cock off so that the water slowly starts flowing down and gets collected in the beaker .
Oil will be left behind in separating funnel.
Result-Oil and water are separated by the use of separating funnel.

Nature of Matter Assignment

Ch-3

Nature of Matter

Assignment Q/A

Q1. Write the difference solid,liquid and gas. Draw the diagram also?

A1. SOLIDS

(1)    Solids have fixed shape and volume.

(2)    Particles are very tightly packed.

(3)    Particles cannot move.

(4)    Force of attraction is maximum.

For E.g:-> (1) Ball

(2) Metal

LIQUIDS

(1)    Liquids have a fixed volume but do not have a fixed shape.

(2)    Particles are less tightly packed.

(3)    Particles can move little.

(4)    Force of attraction is less.

For E.g:-> (1) Water

(2) Ink

GASES

(1)    Gases do not have a fixed shape nor a fixed volume.

(2)    Particles are very loosely.

(3)    Particles can move freely.

(4)    Force of attraction is zero.

For Eg:-> (1) Oxygen

(2) Carbon-Dioxide

Q2. Name the gas,which do not dissolved in water?

A2. (1) Ozone

(2) Helium

(3) Hydrogen

Q3. How can you increase the solubilty of material?

A3. By increasing the temperature of material.

Q4. Why is a water called a universal solvent?

A4. Because a large number of substances can be dissolved in water.

Q5. Name two gases which are soluble in water?

A5. (1) Oxygen

(2) Carbon-Dioxide

Q6. Define classification.How it is useful?

A6. The process of grouping objects with similar properties is called classification.It makes the study of things easier and saves time.

Q7. Define matter and synthetic material?

A7. (1) Anything that occupies space and has more is called matter.

(2) The material which are prepared in the factories are called man-made or synthetic materials.

Q8. How is soda water prepared?

A8. Soda water is prepared by dissolving carbon-dioxide gas in water.

Q9. Name the following:-

(a)    Two materials that can sink in water?

A9.(a) (1) Sand

(2) Stone

(b) Two materials that can float on water?

(b) (1) Paper

(2) Petales

(c) Two liquids soluble in water?

(c) (1) Milk

(2) Lemon Juice

(d) Two liquids insoluble in water?

(d) (1) Oil

(2) Petrol

World No Tobacco Day 2013

Ban tobacco advertising, promotion and sponsorship is the theme of this year’s World No Tobacco Day, which takes place on 31 May 2013. 

Class 6th fbric from fibre (do this in your note book)

                      Assignment (Fabric from fibre)

Q   Write the definitions of the following
         Spinning,Weaving,Dyeing, Printing,Finishing and tailoring.
Answer

•     Spinning--The process of twisting raw fibres into long threads is called spinning

•        Weaving-- Process of making cloth from fibres is called weaving.

•        Dyeing-- The process of colouring cloth is called dyeing.
•        Printing--- Making beautiful patterns on cloth to make it look more attractive is called printing.It is done by hand or machine.

•        Finishing-- The process of making cloth smooth ,shiny and soft  is called finishing.
•     Tailoring  ----The process of stitching the cloth to match  the desired shape and size is called                  tailoring. 
•       

 Q Name the soil where the following grow?
       Cotton,Jute,Coir
Answer
    Cotton---Black soil
    Jute------Alluvial soil
    Coir----Red and yellow soil

Q Why should we wear cotton during summer?
Answer
We should wear cotton during summer because--
1 It allows air to pass through it and sweat gets evaporated.
2 It is natural and does not cause rashes.
3It is soothing for skin.


 

Chapter 14 con'd (class 6th) Do these in your notebook

Answer B
Part 6    Synthetic fibres are better than  natural fibres because they are stronger ,
are wrinkle free,
 have fast colour ,
do not shrink and
and are not spoiled by insects.
Answer B7 (done in the class)

Answer C
Part 1 Jute is used for making ropes, gunny bags,carpets and mats.
Coir is used for making foot mats ,ropes and mattresses.
Part 2 Plant fibres----cotton and jute
          animal fibres---- silk and wool
Part 3  Natural fibre----cotton, jute and wool
       Synthetic fibre----Nylon, terylene and rayon.
Part 4 Silk worm grows on the leaf of mulberry plants.
Answer D
1  Fibres into threads                        Spinning
                                                       
 2 Threads into fabric                      Weaving

3 Colouring the fabric                       Dyeing

4Making pattern on the fabric           Printing    

5 Making fabric smooth and shiny     Finishing       

Answers of Chapter 14 (class 6th) Do these in your notebook

A
 Fill in the blanks
1Cotton plants grow well in Black soil
2Cotton is found inside the fruit of cotton plant called boll.
3The body coat of sheep is called the fleece.
4Wool is obtained from the body coat of of Sheep, goat,or camel.
5Jute is obtained from bark of Jute plant.

B
1Clothes cover our body and protect us from heat ,cold,rain and germs.
2Fibres which are obtained from natural sources like plants and animals are called natural fibres.The fibres which are obtained from plants are called plant fibres and the fibres which are obtained from animals are called animal fibres
3Jute grows well in Alluvial soil.
4Coir is obtained from the outer covering of coconut .
5Synthetic fibres are those which are prepared by using chemicals in the factories.They are also known as
man- made fibres eg Nylon ,terylene,rayon .

Happ...Happ Happy Holidays

Interdisciplinary holidays' home work

HOLIDAYS HOME WORK

CLASS VI (2013-2014)

INTER DISCIPLINARY PROJECT

Topic:-A  THREAT  TO  OUR  EARTH - GLOBAL WARMING

Make a project on the above topic and file neatly which should include the information related to following subtopics.

1.   What is global warming?

2.   Which method do you think can improve the problem of global warming?

3.   What material is the chief culprit leading to the global warming?

4.   What is the approximated rise in temperature expected due to global warming?

5.   Global warming can cause and spread disease. Explain.

6.   Will global warming affect world food production?

7.   What do you mean by sustainable development; elaborate.

Holidays" Assignment

HOLIDAYS HOME WORK

G. SCIENCE

CLASS VI (2013-2014)

ASSIGNMENT

Instructions:-

1.    Read the chapters thoroughly.

2.    Write the following questions in loose sheets  and file them neatly

3.  Can we put plastic in the vermicomposting pit? Why?

4.  Name the diseases/disorders caused y the deficiency of the following and also enlist their symptoms.

(a)      Vitamin-C

(b)       Vitamin-D

(c)        Calcium

(d)                  Iron

5.  Mention 3 food sources which have more than one nutrient in them.

6.  Why should vegetables not be over cooked?

7.  In major cities, Municipal Corporation provides separate Garbage bins. Why?

8.  Dry leaves should not be burnt. Why?

9.   What would happen if you eat energy giving food excess?

10.      Why do    doctors advise against taking too much of fat?

HOLIDAYS HOME WORK

CLASS VI (2013-2014)

PRACTICE ASSIGNMENT FOR ENHANCING G.SCIENCE

1.  Name the major nutrients present in our food.

2.  Brain Ticklers:-

a.   I am a yellow fruit that has vitamin C.

b.   Test me with iodine solution.

c.   You will find me in butter, ghee and ground nuts.

3.  Where do we get food from?

4.  What is balanced diet?

5.  Are all plants autotrophs ? Think of at least two plants which are not autotrophs?

6.  What are the major ingredients of Gajarella? Which of these are provided from animals and which from plants?

7.  Name two herbivores found around you.

8.  Which mineral is vital for bones and teeth?

9.   Name two leafy vegetables eaten by you.

10.What are milch animals?

11.       Give reason why human beings are called heterotrophy?

12.      Give reason why decomposers and scavengers are known as nature’s cleaners?