Category: 7th Maths And Science

Quiz on Mahatma Gandhi by jsunil tutorial

1/11/2018

Download quiz on Gandhi jee Cps samastipur

Q.1. Mohandas Karamchand Gandhi was born on
(a) October 5, 1896
(b) October 3, 1840
(c) October 2, 1869
(d) October 10, 1880
Q.2. At which place was Gandhiji born?
a) Porbandar
(b) Rajkot
(c) Ahmedabad
(d) Delhi
Q.3. What was Gandhiji's age when he got married to Kasturbai?
(a) 19 years
(b) 15 years
(c)12 years
(d) 13 years
Q.4. Gandhiji confessed his guilt of stealing for the purpose of smoking in a letter, promising never to steal in future and asking for adequate punishment. To whom was this letter addressed?
(a) Father
(b) Mother
(c) Elder Brother
(d) Friend
Q.5. About how old was Gandhiji when he reached London to become a barrister?
(a) 20 years
(b) 19 years
(c) 21 years
(d) 18 years
Q.6. To become a barrister in England, one had to join one of the Inns of Courst. After obtaining admission, Gandhiji joined the Inner Temple on
(a) October 5, 1870
(b) December 15, 1885
(c) November 6, 1888
(d) January 3, 1880
Q.7. Devdas was Gandhiji's
(a) Only child
(b) Second child
(c) Eldest child
(d) Youngest child
Q.8. Gandhiji, the votary of nonviolence was shot dead on January 30, 1948 at Birla House, New Delhi, shortly after 5 p.m. while going to the prayer meeting. Which was that fateful day of the week?
(a) Saturday
(b) Wednesday
(c) Friday
(d) Monday
Q.9. In which South African unit had most of the India emigrants taken up abode?
(a) Johannesburg
(b) Natal
(c) Maritzburg
(d) Durban
Q.10. While holding a first-class ticket Gandhiji was ordered by a railway official to shift to the van compartment. On his refusal to comply with the unjust order, a constable was called to push him out with bag and baggage. Identify the railway station where this incident took place.
(a) Natal
(b) Johannesburg
(c) Maritzburg
(d) Durban
Source:https://www.mkgandhi.org
Answer:
1. (c) 1869
2. (a) Porbandar
3. (d) 13 years
4. (a) Father
5. (b) 19 years
6. (c) November 6, 1888
7. (d) Youngest Child
8. (c) Friday
9. (b) Natal
10. (c) Maritzburg

Quiz on Mahatma Gandhi by jsunil tutorial
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Wow maths chapter Simple Interest class7

22/10/2018

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7th percentage and its application wow!Maths

20/10/2018

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Class7 Chapter 03 Plants fiber and fabric

18/4/2018

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Class7 Chapter 03. Plants fiber and fabric

A Tick the correct options:

1. Which of the following is not a natural fibre?

(a) cotton                    (b) rayon √                   (c) silk                          (d) wool

2. Lohi is the breed of

(a) cow                         (b) silk moth                 (c) sheep √                  (d) buffalo

4. Sheep are sheared in season

(a) summer √                 (b) spring   (c) autumn Ö                (d) winter

3. How many weeks are required for the eggs of silk moth to hatch? See book

(a) one                        (b) two √                      (c) three                       (d) four

6. Which of the following silk is produced when raw silk is twisted?

(a) spun                       (b) coloured                 (c) thrown √                 (d) mooga

5. What do we call the silky covering spun by the silkworm for its protection?

(a) moth                       (b) larvae                    (c) pupa           (d) cocoon√

B. Fill in the blanks:

1. Alpaca is generally found in South America.
2. Silk and wool fibres are obtained from animals.

3. Silk is obtained from cocoons of silkworm.
4. Natural fibres are obtained from plants and animals.

6. The fewer the burrs, the better is the wool.

7. The eggs are warmed to a suitable temperature in an oven

8. During the period of spinning of its cocoon, a silkworm is transformed into Pupa.

C. State whether the following statements are True (T) or False (F).
Rewrite the false statements correctly:

1. Silk is obtained from cocoons of silkworms. (T)

2. The process of washing the fleece of sheep to remove dust, dirt, sweat and grease is
called shearing. False Scouring.

3. The rearing of silkworms for obtaining silk is called sericulture. T

4. The damaged or waste cocoons are used to produce raw silk. F Spun silk

D. Very Short Answer Questions:

1. What is the process of removing the burrs from fleece called?
Ans. Combing

2. Name any two breeds of sheep found in India.
Ans.  Merino ,Lohi

3. Name the process of removing hair from the body of a sheep.
Ans. Shearing

4. Name the sheep which is found in Gujarat and whose wool is used in hosiery.
Ans. Patanwadi

6. Which country leads the world in silk production?
Ans. China

5. What is the process of taking out threads from the cocoon called?
Ans. reeling the silk

7. Name two wool-yielding animals.
Ans. Sheep, goat, yak and camel.

E. Short Answer Type-I Questions:

1. What is meant by rearing of sheep?

Ans. The raising and breeding of domestic sheep is called rearing of sheep.

Sheep are raised principally for their meat (lamb and mutton), milk (sheep's milk), and
fiber (wool)

2. What is throwing?

Ans. Throwing is the process of twisting and doubling the single raw silk fibres into
usable thread after reeling and cleaning.

3. Why does shearing not hurt the sheep?

Ans. Shearing doesn't usually hurt a sheep. It's just like getting a haircut.

4. What is meant by scouring?

Ans. The sheared skin with hair is thoroughly washed in tanks to remove grease, dust
and dirt. This is called scouring.

5. What is cocoon?

Ans. A cocoon is a soft covering that an insect spin with silky thread to protect itself.

F. Short Answer Type-| Questions:

1. What is meant by selective breeding? What is its purpose?

Ans. Selective breeding is a kind of artificial selection in which two different kind of
breed are crossed to develop new organisms with desirable characteristics. For example
native breeds (female) crossed with exotic breed (male).

2. What is silk? How do we get silk from cocoon?

Ans. Silk is a kind of animal which are soft and lustrous.

The cocoons are kept under the sun or boiled or exposed to steam. The silk fibres
separate out.

3. (a) What are raw silk and spun silk?
(b) On burning silk, it gives out the smell of burning hair. Give reason.

Ans. (a) Silk fibre obtain from cocoon and twisted to make stronger thread is called raw
silk. Silk fibre obtain from damaged cocoon is called spun silk.

(b) On burning silk gives out the smell of burning hair as it is made up of protein

4. With the help of a flow chart only, describe the life cycle of a silkworm.

5. (a) What is sorter's disease?

Ans. People working in wool industry sometimes they get infected by a bacterium called
anthrax, which causes a fatal blood disease called sorter’s disease

(b) Name two Indian breeds of sheep and also mention the quality of wool produced.

Ans. (i) Deccani sheep breed - low grade fibres, mostly used for the manufacturing rough
blankets (Kambals).

(ii) Gaddi Sheep Breed - wool is fine and lustrous and it is used for manufacturing of
high quality kulu shawls and blankets.

6. (a) Why do wool yielding animals have a thick coat of hair on their bodies?

Ans. wool yielding animals have a thick coat of hair on their bodies so that sheep can
withstand with cold weather.

(b) The process of removing hair from the body of sheep is called shearing. Why is
shearing done in summers?

Ans. Sheep are usually found in hilly and cold region. Shearing of sheep done in
summers because sheep can survive without their protective coat of hair.

G. Long Answer Questions:

1. Write the various steps involved in the production of silk cloth from silk moth.

Ans. a. Incubation: The silk moth eggs are warmed to a temperature suitable for
hatching. This is known as incubation.

b. Rearing: After hatching, the silkworms are fed on mulberry leaves for six weeks, and
the worms eat almost continuously and increase in size.

c. Spinning: Branches of trees or shrubs are placed in their rearing houses. The worms
climb these branches and make their cocoons out of one continuous thread.

d. Reeling: The cocoons are first boiled or treated in ovens, killing the insects by heat.
The silk fibre is then obtained from the cocoons by a delicate process known as reeling.
This fibre woven into cloth.

2. Describe the process of wool production.

Ans. The different processes involved in wool production are shearing, scouring, grading,
dyeing, and drying.

Shearing: The process of removal of the fleece from an animal is called shearing.

Scouring: The sheared hair is washed properly to remove dirt, dust, and grease. The
process of removing dirt, dust, and grease from the sheared hair is called scouring.

Grading : the wool is sorted on the basis of length, colour, texture

Dyeing: As the natural colour of fleece is white, brown, or black, the sheared wool is
dyed in different colours.

Drying : In this process, containers of wool are put through rollers to squeeze out as
much water as possible. Then the wool is weighed and packed into bales. The bales are
transported to the mills where they are processed further for making cloth

3. Discuss various varieties of natural silk.

Ans. Eri silk – it may be white or brick-red ;

Muga silk - golden-yellow silk thread which is very attractive and strong.

Mulberry silk – it contributes to around 90 percent of the world silk production.

Tasar silk - copperish colour mainly used for furnishings and interiors.

H. HOTS (Higher Order Thinking Skills) Questions:

1. How is selective breeding advantageous for us?

Ans. selective breeding increase the production by selecting best variety of animals.

2. Why are animal activists against the silk production?

Ans. Animal activists are against the present process of getting silk from the cocoon
because in this process the pupa are killed in a cruel way by boiling them in water.

For more chapters visit 7th science
7th_ch-4 Natural fiber solution living Science Download File

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Class7 Chapter 02 Nutrition in Animals Cordova Science

15/4/2018

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E. Short Answer Type-I Questions:
1. What is the function of saliva?

Ans: The digestive functions of saliva include moistening food, and helping to create a
food bolus, so it can be swallowed easily.
Saliva contains the enzyme amylase, also called ptyalin, which is capable of breaking
down starch into simpler sugars such as maltose and dextrin that can be further broken
down in the small intestine

2. What is ingestion?

Ans: The process of taking food inside our mouth is known as ingestion.

3. What is chyme?

Ans: Partially digested food formed by the action of gastric juice in the stomach is called
as chime.

4. What happens to the undigested food in the body?

Ans: The undigested food passes to large intestine.Some water is absorbed and the semi
solid waste (feces) is egested through anus.
5. What do you understand by the term assimilation?

Ans: The process of producing energy from the absorbed food is known as assimilation

6. Where is liver located? Give its function.

Ans:liver lies in front of stomach. Liver secrate bile that is stored in gall bladder. It make
the digestion of fat faster.

Note: Bile juice contains no digestive enzymes, yet it is important for digestion. Bile juice
has bile pigments such as bilirubin and biliverdin. These break down large fat globules
into smaller globules so that the pancreatic enzymes can easily act on them. This process
is known as emulsification of fats.

F. Short Answer Type-Il Questions:

1. Why we cannot breathe and swallow at the same time?

Ans: Every time we swallow, the epiglottis closes the wind pipe .If we breathe and
swallow at the same time, food or water enters wind pipe and we chock and cough.

2. In what substances carbohydrates, proteins and fats get converted into after
digestion?

Ans: in small intestine Carbohydrates get converted into sugars. Proteins get converted
into amino acids. Fats get converted into fatty acids and glycerol.
3. What are the functions performed by tongue?

Ans: tongue helps in process of chewing by pushing the food towards the teeth. It also
help to mix the food with saliva.

4. Which part of the alimentary canals involved in (a) chewing of food (b) killing of
bacteria (C) absorption of food (d) formation of faeces?

Ans: (a) chewing of food – Mouth (b) killing of bacteria – stomach (C) absorption of
food – small intestine (d) formation of faeces – large intestine

5. Different types of teeth in our jaws have different functions, but they all work together
to chew the food.

Ans: Different types of teeth in our jaws have different functions

(i) Incisors :- They help us in biting and cutting the food.

(ii) Canines : - They help us in piercing and tearing the pieces of meat.

(iii) Premolars:- They assist the molars by holding the food with their cusps and also
crushing them.

(iv) Molars : - They help us in chewing and grinding the food so that it can be swallowed
easily.

(b) What do we learn from our teeth that have different functions?

Ans: If we work united we will do any impossible work .

G. Long Answer Questions:

1. Briefly describe nutrition in Amoeba with the help of diagrams.

Ans: Amoeba takes in food by forming temporary finger-like projections called
pseudopodia. The pseudopodia fuse over the food particle forming a food vacuole. The
digestive enzymes from the surrounding cytoplasm enter into the food vacuole and
breakdown the food into small, water soluble molecules by chemical reactions. The
digested food from the food vacuole spreads into the whole of Amoeba cell and gets
absorbed in the cytoplasm. A part of absorbed food is used to obtain energy through
respiration and some is used for the growth of Amoeba cell. The undigested part of the
food is moved to the surface of Amoeba cell and egested (thrown out) by the rupture of
cell membrane.

2. Describe the process of digestion in ruminants.

Ans: The stomach of a ruminant is divided into four chambers. As soon as the ruminant
swallows the food, it enters the first chamber called rumen where it gets partially
digested (converted to cud). From here, the food enters the second chamber from where
it again reaches the mouth for rumination, which is thorough chewing. The food is again
swallowed, and now it enters the third and the fourth chamber for digestion. From here,
it enters the small intestine for the absorption of nutrients.

3. What are liver and pancreas? Write their functions in detail.

Ans: liver and pancreas are organ that help in digestion of food.

Live produce bile juice that breaks down fats and stores some vitamins and minerals.

The pancreas has two main functions: an exocrine function that helps in digestion and
an endocrine function that regulates blood sugar.
Note:
Liver is the largest gland of the body. It is a reddish-brown gland situated on the right side of the upper part of the
Abdomen.

Functions of liver are as follows:

(i) To secrete bile juice which helps in the emulsification of fats present in the food.

(ii) Detoxification- Conversion of toxic substances into non-toxic forms like conversion
of ammonia to urea which gets excreted in the urine.

(iii) Clearing the blood from drugs and other harmful substances.

(iv) Conversion of excess glucose into glycogen for storage (glycogen can later be
converted back to glucose to energy when body is in short of nutrients)

Pancreas is a organ located in the upper abdomen and adjacent to the small
intestine. It performs two main kind of functions in the body:

(i) Exocrine function: It helps in the digestion of food. It produces various enzymes such
as amylase, lipase and trypsin which helps to digest carbohydrate, fats and proteins
respectively.

(ii) Endocrine function: It produces hormonal insulin and glucagon which regulate the
level of sugar present in the blood

H. HOTS (Higher Order Thinking Skills) Questions:

1. The bacteria present on uncleaned teeth convert the sugar in food into a substance 'X'
which causes tooth decay. Name the substance 'X'. Which part of the teeth does it affect?

Ans: Substance X is lactic acid which is formed in the mouth after we eat food
containing sugar. it affect enamel.

[ Note : Lactic acid lowers the pH in the mouth making it acidic. Our tooth enamel is
made up of calcium phosphate, which is the hardest material in our body, but even it
starts getting corroded when the pH in the mouth is lower than 5.5(Acidic)]

2. How is ruminant's stomach different from humans?

Ans: The stomach of a ruminant is divided into four chambers they are rumen,
reticulum, omasum, and abomasum. Human stomach is a single organ.

For more books and full solution visit 7th Science

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Class7 Chapter 01 Nutrition in plants and Animals Cordova Science

14/4/2018

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Class7 Chapter 01 Nutrition in plants and Animals Cordova Science
Exercise
A (Tick) the correct options:

1. Rhizobium bacteria live in the root nodules of plant

(a) wheat                     (b) rice                                     (c) barley                     (d) peaÖ

2. Plants store food as

(a) cellulose (b) sugar (c) glucose (d) starchÖ

3. Which of the following is an insectivorous plant?

(a) Cucuta                   (b) DroseraÖ                            (c) mistletoe                (d) lichen

4. The mode of nutrition shown by Cuscuta is

(a) parasiticÖ              (b) symbiotic                           (c) saprophyte             (d) autotrophic

5. On adding iodine solution, starch

(a) turns blue blackÖ   (b) turns green (C) remains colourless            (d) turns red

6. We keep healthy potted plant in a dark room for some days to the leaves

(a) decolourise            (b) defragment            (c) destarchÖ               (d) deprotein

7. The portion of leaf that is not exposed to sunlight, will not make

(a) fats                         (b) protein                   (c) glucose Ö               (d) starch

B.Fill in the blanks:

1. Rhizobium bacteria provide --nitrogen---- to the leguminous plants.

2. Green plants make their food by the process of photosynthesis.

3. Stomata are surrounded by guard cells.

4. Cuscuta is a -Total--- parasite.

5. The roots of saprophytes contain organisms called ….symbionts

C. Very Short Answer Questions:

1. Name any two heterotrophs.

Ans: Animals,Mushroom

2. Name any two insectivorous plants.

Ans: Venus flytrap, pitcher plants, butterworts, sundews

3. Name the pores through which leaves exchange gases.

Ans: Stomata

4. Name one plant in which photosynthesis occurs in plant part other than leaves. Name
the plant part.

Ans: cactus in it's stem

5. What are the two main modes of nutrition in plants?

Ans: Autotropic and heterotrophic

6. Name the green pigment present in the leaves.

Ans: Chlorophyll

D. Short Answer Type-l Questions:

1. What are autotrophs?

Ans: Organism prepare own food like green plants

2. Why is Cuscuta called parasite?

Ans: Cuscuta is called parasite as it draw nutrition from host.

3. In which form, do plants need nitrogen?

Ans: Plants absorb nitrogen from the soil in the form of nitrate (NO3−) and ammonium
(NH4+)

4. Why are leaves of a plant green in colour?

Ans: leaves of a plant are green in colour due to presence of chlorophyll.

5. Why do some plants feed on insects?

Ans: some plants feed on insects to get nitrogenous compound from which they make
protein

6. Define photosynthesis.

Ans: Photosynthesis is the food making process of green plant using CO2 and water in
the presence of sunlight

E. Short Answer Type-ll Questions:

1. How can we decolorized a leaf? What will you conclude when white patches do not
turn blue black adding iodine solution?

Ans: Leaf of green plant heated in a test tube containing alcohol in water bath to
decolorize. if white patches do not turn blue black adding iodine solution showing
absence of starch

2. What is saprotrophic mode of nutrition? Give one example.

Ans: The mode of nutrition in which organism derive nutrients from dead and decaying
organic matter. Eg. Mushroom.

Saprophytes breakdown organic matter by secreting digestive juice into it. Then they
absorb what they need from the digested matter.

3. How does the pitcher plant catch its food?

Ans : Pitcher plants have leaves that look like pitchers. The lid of the pitcher closes when
an insect lands on the pitcher. The trapped insect slides down the wall of the pitcher and
is digested inside it.

4. Algae and fungi live together in lichens.

(a) What is this association called? (b) What value can we learn from this association in
nature?

Ans: The fungus provides minerals and water to the alga. The alga supplies the fungus
with food that it manufactures.

(a) Symbiotic relationship (b) We live with other in mutual benefit take help and give
help.

5. Discuss the importance of photosynthesis.

Ans: Photosynthesis helps green plant to prepare glucose. Photosynthesis use CO2 and
release O2 and thus balance the oxygen and carbon dioxide level in atmosphere. Water
vapor released during photosynthesis also help in formation of cloud and bring rain.

F. Long Answer Questions:

1. Write an experiment to show that sunlight is necessary for photosynthesis.

Ans: cover a part of a leaf of a potted plant with black paper. Use paper clips to fix the
paper on both sides of the leaf

Make sure the plant get enough sunlight Pluck the leaf and take off the paper after two
days.

Heat the leaf in alcohol, as in the previous activity, and test for starch. Only the part of
the leaf which was exposed to sunlight will turn blue-black. This shows that sunlight is
necessary for photosynthesis.

2. How do Rhizobium bacteria and leguminous plants help each other in survival?

Ans: Plant provide shelter to Rhizobium bacteria and Rhizobium bacteria provide nitrogenous compound that plants required to make plants protein.

G. HOTS (Higher Order Thinking Skills) Questions:

1. What will happen if plant leaves are devoid of stomata?

Ans: if plant leaves are devoid of stomata there is no exchange of gases like O2 and CO2
. Plants cannot perform photosynthesis

2. What will happen if all the plants disappear from the earth?

Ans: Food chain unbalance and no life exist.

For more chapter visit 7th science

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Unitary method solved questions for Class7(2018)

4/3/2018

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Using direct and indirect variation method solve this exercise in just a min.(By Jsunil Sir

7th CBSE Maths SA-I [Link]
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Fractions & decimals
Data handling
Simple equations
Lines & angles
The triangle & its properties
Congruence of triangles
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Comparing quantities
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Perimeter & area
Algebraic expressions
Exponent & powers
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7th DAV SAMPLE PAPER FOR ANNUAL EXAMINATION– 2017-18

26/1/2018

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7th Acids bases and Salt Living science solution

27/7/2017

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P. 71 Oral Questions For Formative Assessment (Living Science)
1. acetic acid and citric acid
2. Acids are corrosive in nature. Strong acids can corrode even metals like iron and aluminium. Hence, acids are not stored in metal containers.
3. litmus paper and methyl orange; acid-base indicators
4. neutralization reaction, salt
5. Organic acids are naturally occurring acids that are present in animal and plant products. They are normally weak acids. Hydrochloric acid, sulphuric acid and nitric acid are known as mineral acids. They are normally strong acids.
P. 72 Oral Questions For Formative Assessment
1. Bases which are soluble in water are called alkalis. But some bases are not soluble in water, so they are not alkalis. That is why all alkalis are bases but all bases are not alkalis.
2. I will not recommend that quicklime or slaked lime be added to the soil to neutralize the acid present in it.
3. sodium hydroxide (NaOH)
4. hydrochloric acid (HCI), magnesium hydroxide is used as an an acid to neutralize the excess add in the stomach
P. 74 Oral Questions For Formative Assessment
1. If we replace hydrogen of an acid with a metal, a salt is formed.
2. a salt and water
3. a. nitric acid
b. carbonic acid
c. hydrochloric acid
d. sulphuric acid
4. a salt; sodium bicarbonate (NaHCO3)
Page 74 For Formative and Summative Assessment
A. 1. d         2.a        3.c          4. d       5. c       6. a                7. d 8. d 9. b
B. 1. sodium chloride 2. an acid                    3. red                         4. false
5. nitric acid
6. lactic 7. carbon dioxide       8. neutralization 9. sulphuric add        10. alkali
11. ammonium hydroxide
12. a base                   13. pale yellow            14. caustic soda          15. magnesium hydroxide
16. true                        17. blue
C. 1. The substance which can be used to test if a given substance is acidic or basic in nature is known as an acid-base indicatdr, for example, methyl orange.
2. lemon, antacid, common salt 3. When dilute sulphuric acid is added to zinc, hydrogen gas is produced along with zinc sulphate.
4. Dilute acids react with carbonates such as calcium carbonate (CaCO3) to form salt and carbon dioxide gas.
5. Examples of strong acids: (I) Nitric acid (ii) Sulphuric acid
Examples of weak acids: (i) Lactic acid (ii) Acetic acid
6. Ant bite injects formic acid inside the skin, and thus skin irritates for some time. To get relief, a base (baking soda) is applied to neutralize the acid. The irritation ends with forming salt and water and provides relief.
7th Acids bases and Salt Living science solution
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Quiz on Mahatma Gandhi by jsunil tutorial

Wow maths chapter Simple Interest class7

7th percentage and its application wow!Maths

Class7 Chapter 03 Plants fiber and fabric

Class7 Chapter 02 Nutrition in Animals Cordova Science

Class7 Chapter 01 Nutrition in plants and Animals Cordova Science

Unitary method solved questions for Class7(2018)

Exponent class7 worksheet/Assignment and Test paper Jsunil Tutorial

7th DAV SAMPLE PAPER FOR ANNUAL EXAMINATION– 2017-18

7th Acids bases and Salt Living science solution

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