Saturday, 29 April 2017
Revision Assignment for 10th
Revision Assignment for 10th
Fill these blanks(copy n paste in the notebook)
Revision assignment for 9th
Revision assignment for 9th(do it in the notebook)
Q1 What will happen if raisins are immersed in water and why?
Q2 Why do we add some salt while boiling eggs especially in winters.
Q3 Who proposed cell theory and which material was used to study cell by Robert Hooke?
Q4 What is plamolysis?
Q5 Give one example of prokaryotic and Eukaryotic cell?
Q1 What will happen if raisins are immersed in water and why?
Q2 Why do we add some salt while boiling eggs especially in winters.
Q3 Who proposed cell theory and which material was used to study cell by Robert Hooke?
Q4 What is plamolysis?
Q5 Give one example of prokaryotic and Eukaryotic cell?
Friday, 28 April 2017
Revision assignment for 10th
Revision assignment for 10th
Q1What is extracellular digestion give example?
Q2Write the equation of photosynthesis and write it's three steps .
Q3Name the storage carbohydrate in plants and in animals.
Q4Which part in the leaf is responsible for photosynthesis and which one stores food?
Tuesday, 25 April 2017
Attention 9th
A very common question asked by 9thees
was which organellae is the store house of the cell ?
Answer Vacuoles are called store house of the cell because they store water, mineral salts, nutrients as well as waste products.
Diagram of compound microscope
Assignment 9th for 9th
Q1 Name the two ogananellae which are semi autonomous?
Q2 Why is chloroplast called the kitchen of the cell?
Lateral thinking
What is called fuel and what is called currency of the cell and why?
Which type of plastids are present inside potato, nuts and colocacia?
was which organellae is the store house of the cell ?
Answer Vacuoles are called store house of the cell because they store water, mineral salts, nutrients as well as waste products.
Diagram of compound microscope
Assignment 9th for 9th
Q1 Name the two ogananellae which are semi autonomous?
Q2 Why is chloroplast called the kitchen of the cell?
Lateral thinking
What is called fuel and what is called currency of the cell and why?
Which type of plastids are present inside potato, nuts and colocacia?
diagram of heart
Diagram of heart
Assignment 11 for 10th
Q1 Name the following
(a) the vessel bringing blood from body to heart
(b) Vessel bringing blood from heart to lungs
(c) Vessel bringing blood from heart to body
(d) Vessel bringing blood from lungs to heart
Q2 Do all arteris have oxygenated blood ? give reason to your answer.
Lateral Thinking
Why do sometimes doctor ask some patients to keep their legs slightly in higher position while restingor sleeping when there are blue clots in their legs and they complain of pain in them?
Monday, 24 April 2017
attention!!!
Assignment for 10th
Q1 Draw well labelled diagram of human heart .
Q2 Define double circulation.
Lateral thinking
Evaluate the structure of lungs best suited for breathing while heart for pumping!!!(just tell the arguments)
Why do arteries not have valves?
Assignment for 9th
Q1 Explain the role of the following
(a) Golgi apparatus
(b) Lysosomes
(c) Mitochondrion
HOTS
Q1 Why is mitochondrion called power house of the cell?
Q2 which organellae is called suicidal bags and why?
Q1 Draw well labelled diagram of human heart .
Q2 Define double circulation.
Lateral thinking
Evaluate the structure of lungs best suited for breathing while heart for pumping!!!(just tell the arguments)
Why do arteries not have valves?
Assignment for 9th
Q1 Explain the role of the following
(a) Golgi apparatus
(b) Lysosomes
(c) Mitochondrion
HOTS
Q1 Why is mitochondrion called power house of the cell?
Q2 which organellae is called suicidal bags and why?
Sunday, 23 April 2017
Syllabus for first term for tenth
Syllabus for first term for tenth
Chapter life processes 1 till nutrition (plants and animals all )
Chapter life processes 1 till nutrition (plants and animals all )
Saturday, 22 April 2017
Friday, 21 April 2017
Assignment no 9 for 10th
Assignment no 9 for 10th
Q1 What are the difference between arteries and veins?
( as many as you can)
Q2 What is function of capillaries?
Q3 What is the role of blood in our body?
HOTS
Q1 why do veins have valves?
Q2 Comment on the statement" ours is a closed circulatory system"
Q3 Name the instrument used to measure blood pressure. Define blood pressure.
Q1 What are the difference between arteries and veins?
( as many as you can)
Q2 What is function of capillaries?
Q3 What is the role of blood in our body?
HOTS
Q1 why do veins have valves?
Q2 Comment on the statement" ours is a closed circulatory system"
Q3 Name the instrument used to measure blood pressure. Define blood pressure.
assignments for 9th and 10th
Assignment 7 for 9th
Q 1 what is the membrane bio genesis?
Q 2 what is the role of endoplasmic reticulum in the cell?
HOTS
Q 3 Which organelle is called store house of the cell and why?
Q4 why are lysosomes called suicidal bags?
Q5 which organelle helps in detoxifying waste in liver ?
Q 1 what is the membrane bio genesis?
Q 2 what is the role of endoplasmic reticulum in the cell?
HOTS
Q 3 Which organelle is called store house of the cell and why?
Q4 why are lysosomes called suicidal bags?
Q5 which organelle helps in detoxifying waste in liver ?
Wednesday, 19 April 2017
Respiratory system
Respiratory system (you may paste the copy of this in front of your description but hand drawn diagram is a must)
Tuesday, 18 April 2017
Assignment 8 for 10th
Assignment 8 for 10th
Q1 Explain the process of breathing in two steps ie inhalation and exhalation.
HOTS
Q1 Why is there residual amount of air in the lungs even after exhalation?
(hint-otherwise lungs would collapse )
Q1 Explain the process of breathing in two steps ie inhalation and exhalation.
HOTS
Q1 Why is there residual amount of air in the lungs even after exhalation?
(hint-otherwise lungs would collapse )
Assignment 6 for 9th
Assignment 6 for 9thQ1 Draw well labelled diagram of plant and animal cell and mention the difference between them?(you may paste this on one side and draw on the other or only draw your diagram )
Monday, 17 April 2017
practical for 9th
practical for 9th (This is the sequence )
Class 9th start your practicals
1st is to study parts of compound microscope?
2nd To test for starch
3rd To test for metanil yellow
4th to prepare temporary mount of onion peel
5th To prepare temporary mount of cheek cells..........
Assignment 7 for class 10th
Assignment 7 for class 10th
Q 1 Write the functions of the following in context to respiration:
(a) epiglottis
(b) cartilaginous rings in trachea
(c) ribs
(d) nasal cavity
Q2 What are the features of alveoli that make it suitable for breathing site?
HOTS
Q1 why should we not talk in between eating?
Q2 Why people working in the coal mines are prone to pulmonary diseases?
Note -Do your work neatly and must complete on time
Q 1 Write the functions of the following in context to respiration:
(a) epiglottis
(b) cartilaginous rings in trachea
(c) ribs
(d) nasal cavity
Q2 What are the features of alveoli that make it suitable for breathing site?
HOTS
Q1 why should we not talk in between eating?
Q2 Why people working in the coal mines are prone to pulmonary diseases?
Note -Do your work neatly and must complete on time
Thursday, 13 April 2017
Assignment 6 for tenth
Must complete your assignments by Monday
Q 1 Compare and contrast
(1)combustion and respiration
(2) photosynthesis and respiration
(3) breathing and respiration
Q 2 Which process is more efficient aerobic respiration or anaerobic?
Q 3 Name the common chemical in both type of respiration.
Q 4 Name the breathing organs in ;
(a) Man
(b) fish
(c)Insects
(d)frog
Q5 Write the equations of all type of respiration?
HOTS
Q1 Why do we have provision for anaerobic respiration in our muscles?
Q2 What are the features of any respiratory surface?
Q3 What is importance of haemoglobin in our body?
(must write neatly )
Q 1 Compare and contrast
(1)combustion and respiration
(2) photosynthesis and respiration
(3) breathing and respiration
Q 2 Which process is more efficient aerobic respiration or anaerobic?
Q 3 Name the common chemical in both type of respiration.
Q 4 Name the breathing organs in ;
(a) Man
(b) fish
(c)Insects
(d)frog
Q5 Write the equations of all type of respiration?
HOTS
Q1 Why do we have provision for anaerobic respiration in our muscles?
Q2 What are the features of any respiratory surface?
Q3 What is importance of haemoglobin in our body?
(must write neatly )
Wednesday, 12 April 2017
Attention 9th
Syllabus for may exam
Chapter cell till difference between prokaryotic and eukaryotic cell
Assignment 5
Tabulate the difference between prokaryote and eukaryote
Don't write the dimensions of these ,only can mention which is small and which is large ,must support your answer with example also
😊
Chapter cell till difference between prokaryotic and eukaryotic cell
Assignment 5
Tabulate the difference between prokaryote and eukaryote
Don't write the dimensions of these ,only can mention which is small and which is large ,must support your answer with example also
😊
Tuesday, 11 April 2017
notes on respiration for 10th and assigmnment
Assignment 5 for 10th
Q1 Difference between aerobic and anaerobic respiration?
Q2 Draw labelled diagram of human respiratory system.
Respiration
The process by which a living being utilizes the
food to get energy is called respiration. Respiration is an oxidation reaction in which carbohydrate is oxidized
to produce energy. Mitochondrion is the site of respiration and the energy released is stored in the form of ATP
(Adenosine triphosphate). ATP is stored in mitochondria and is released as per
need.
a.
Breaking down glucose
into pyruvate: This step happens in the cytoplasm. Glucose molecule is broken
down into pyruvic acid. Glucose molecule is composed of 6 carbon atoms, while
pyruvic acid is composed of 3 carbon atoms.
b.
Fate of Pyruvic Acid:
Further breaking down of pyruvic acid takes place in mitochondria and the
molecules formed depend on the type of respiration in a particular organism. Respiration is of two types, viz. aerobic respirationand anaerobic respiration.
1.
Aerobic Respiration: This type of respiration happens in the presence of oxygen. Pyruvic acid is converted
into carbon dioxide. Energy is released and water molecule is also formed at
the end of this process.
2.
Anaerobic Respiration: This type of respiration happens in the absence of oxygen. Pyruvic acid is either
converted into ethyl alcohol or lactic acid. Ethyl alcohol is usually formed in
case of anaerobic respiration in microbes; like yeast or bacteria.
Lactic acid is formed in some microbes as well as in the muscle cells.
Glucose (6 carbon molecule) ⇨
Pyruvate (3 carbon molecule) + Energy
Pyruvate (In yeast; lack of O2 ) ⇨ Ethyl alcohol + Carbon dioxide + Energy
Pyruvate (In muscles; lack of O2 ) ⇨ Lactic Acid + Energy
Pyruvate (In mitochondria; presence of O2 ) ⇨ Carbon dioxide + Water + Energy
The equations for above reactions can be written as follows:
C6H12O6 ⇨ 6CO2 + 6H2O + Energy
C6H12O6 ⇨ C2H5OH + CO2
C6H12O6 ⇨ CH3CHOHCOOH
Pain in Leg Muscles on Running: When someone runs too fast, he may experience a throbbing
pain the leg muscles. This happens because of anaerobic respiration taking place in the muscles. During
running, the energy demand from the muscle cells increases. This is compensated
by anaerobic respiration and lactic acid is formed in the process.
The deposition of lactic acid causes the pain the leg muscles. The pain
subsides after taking rest for some time.
Exchange of Gases: For aerobic respiration; organisms need a continuous supply of oxygen,
and carbon dioxide produced during the process needs to be removed from the
body. Different organisms use different methods for intake of oxygen and
expulsion of carbon dioxide. Diffusion is the method which is utilized by
unicellular and some simple organisms for this purpose. In plants also,
diffusion is utilized for exchange of gases. In complex animals, respiratory
system does the job of exchange of gases. Gills are the respiratory organs for fishes.
Fishes take in oxygen; which is dissolved in water; through gills. Since
availability of oxygen is less in the aquatic environment so the breathing rate of aquatic organisms is faster. Insects have a system
of spiracles and tracheae which is used for taking in oxygen.
Terrestrial organisms have developed lungs for
exchange of gases. Availability of oxygen is not a problem in the terrestrial
environment so breathing rate is slower compared to what it is in fishes.
Human Respiratory System:
The human respiratory system is composed of a pair of lungs. These
are attached to a system of tubes which open on the outside through the
nostrils. Following are the main structures in the human respiratory system:
Nostrils: There
two nostrils which converge to form a nasal passage. The inner lining of the
nostrils is lined by hairs and remains wet due to mucus secretion. The mucus
and the hairs help in filtering the dust particles out from inhaled air.
Further, air is warmed up when it enters the nasal passage.
Pharynx: It is a tube like
structure which continues after the nasal passage.
Larynx: This part comes
after the pharynx. This is also called the voice box.
Trachea: This is composed
of rings of cartilage. Cartilaginous rings prevent the collapse of trachea in
the absence of air.
Bronchi: A pair of bronchi
comes out from the trachea; with one bronchus going to each lung.
Bronchioles: A
bronchus divides into branches and sub-branches; inside the lung.
Alveoli: These are air-sacs at the end of bronchioles. Alveolus is
composed of a very thin membrane and is the place where blood capillaries open.
This is alveolus; where oxygen mixes with the blood and carbon dioxide exits
from the blood. The exchange of gases; in alveoli; takes place due to pressure
differential.
Respiration
The process by which a living being utilizes the
food to get energy is called respiration. Respiration is an oxidation reaction in which carbohydrate is oxidized
to produce energy. Mitochondrion is the site of respiration and the energy released is stored in the form of ATP
(Adenosine triphosphate). ATP is stored in mitochondria and is released as per
need.
a.
Breaking down glucose
into pyruvate: This step happens in the cytoplasm. Glucose molecule is broken
down into pyruvic acid. Glucose molecule is composed of 6 carbon atoms, while
pyruvic acid is composed of 3 carbon atoms.
b.
Fate of Pyruvic Acid:
Further breaking down of pyruvic acid takes place in mitochondria and the
molecules formed depend on the type of respiration in a particular organism. Respiration is of two types, viz. aerobic respirationand anaerobic respiration.
1.
Aerobic Respiration: This type of respiration happens in the presence of oxygen. Pyruvic acid is converted
into carbon dioxide. Energy is released and water molecule is also formed at
the end of this process.
2.
Anaerobic Respiration: This type of respiration happens in the absence of oxygen. Pyruvic acid is either
converted into ethyl alcohol or lactic acid. Ethyl alcohol is usually formed in
case of anaerobic respiration in microbes; like yeast or bacteria.
Lactic acid is formed in some microbes as well as in the muscle cells.
Glucose (6 carbon molecule) ⇨
Pyruvate (3 carbon molecule) + Energy
Pyruvate (In yeast; lack of O2 ) ⇨ Ethyl alcohol + Carbon dioxide + Energy
Pyruvate (In muscles; lack of O2 ) ⇨ Lactic Acid + Energy
Pyruvate (In mitochondria; presence of O2 ) ⇨ Carbon dioxide + Water + Energy
The equations for above reactions can be written as follows:
C6H12O6 ⇨ 6CO2 + 6H2O + Energy
C6H12O6 ⇨ C2H5OH + CO2
C6H12O6 ⇨ CH3CHOHCOOH
Pain in Leg Muscles on Running: When someone runs too fast, he may experience a throbbing
pain the leg muscles. This happens because of anaerobic respiration taking place in the muscles. During
running, the energy demand from the muscle cells increases. This is compensated
by anaerobic respiration and lactic acid is formed in the process.
The deposition of lactic acid causes the pain the leg muscles. The pain
subsides after taking rest for some time.
Exchange of Gases: For aerobic respiration; organisms need a continuous supply of oxygen,
and carbon dioxide produced during the process needs to be removed from the
body. Different organisms use different methods for intake of oxygen and
expulsion of carbon dioxide. Diffusion is the method which is utilized by
unicellular and some simple organisms for this purpose. In plants also,
diffusion is utilized for exchange of gases. In complex animals, respiratory
system does the job of exchange of gases. Gills are the respiratory organs for
fishes. Fishes take in oxygen; which is dissolved in water; through gills.
Since availability of oxygen is less in the aquatic environment so the breathing rate of aquatic organisms is faster. Insects have a system
of spiracles and tracheae which is used for taking in oxygen.
Terrestrial organisms have developed lungs for
exchange of gases. Availability of oxygen is not a problem in the terrestrial
environment so breathing rate is slower compared to what it is in fishes.
Human Respiratory System:
The human respiratory system is composed of a pair of lungs. These
are attached to a system of tubes which open on the outside through the
nostrils. Following are the main structures in the human respiratory system:
Nostrils: There
two nostrils which converge to form a nasal passage. The inner lining of the
nostrils is lined by hairs and remains wet due to mucus secretion. The mucus
and the hairs help in filtering the dust particles out from inhaled air.
Further, air is warmed up when it enters the nasal passage.
Pharynx: It is a tube like
structure which continues after the nasal passage.
Larynx: This part comes
after the pharynx. This is also called the voice box.
Trachea: This is composed
of rings of cartilage. Cartilaginous rings prevent the collapse of trachea in
the absence of air.
Bronchi: A pair of bronchi
comes out from the trachea; with one bronchus going to each lung.
Bronchioles: A
bronchus divides into branches and sub-branches; inside the lung.
Alveoli: These are air-sacs at the end of bronchioles. Alveolus is
composed of a very thin membrane and is the place where blood capillaries open.
This is alveolus; where oxygen mixes with the blood and carbon dioxide exits
from the blood. The exchange of gases; in alveoli; takes place due to pressure
differential.
Breathing Mechanism:
The breathing mechanism of lungs is controlled by the diaphragm and the intercostalis muscles. Diaphragm is a membrane which separates the thoracic chamber from the
abdominal cavity. When diaphragm moves down, the lungs expand and air is inhaled. When diaphragm moves up, the lungs contract and air is exhaled.
Monday, 10 April 2017
Assignment 4 for 10th
Do the following questions
Q1 Name the largest gland and write it's function in digestion.
Q2 What is the role of HCL in stomach? (two functions)
Q3 Where is food absorbed and what is the specialty of this structure?
Q4 What is the function of large intestine?
High order thinking questions
Q1 Why should experience the taste of starchy food slightly sweet after putting it in mouth for sometime?
Q2 Why does the medium of food needs to change when it reaches duodenum to basic from acidic ?
Q1 Name the largest gland and write it's function in digestion.
Q2 What is the role of HCL in stomach? (two functions)
Q3 Where is food absorbed and what is the specialty of this structure?
Q4 What is the function of large intestine?
High order thinking questions
Q1 Why should experience the taste of starchy food slightly sweet after putting it in mouth for sometime?
Q2 Why does the medium of food needs to change when it reaches duodenum to basic from acidic ?
Saturday, 8 April 2017
Friday, 7 April 2017
download and paste in your notebook scheme of examination for 10th
|
Assignment 4 for 9th
What is function of nucleus?
Differentiate between
Chromatin material and chromosome
What is function of gene?
Why is nucleus called control house of the cell
HOTS
what is DNA ?
What is the difference between nucleus and nucleolus?
Differentiate between
Chromatin material and chromosome
What is function of gene?
Why is nucleus called control house of the cell
HOTS
what is DNA ?
What is the difference between nucleus and nucleolus?
Thursday, 6 April 2017
Assignment 3 for 9th and 10th
Questions for 9th
Q 1 What is the cell wall made up of ?
Q 2 Explain the following
: If the plant cell is immersed in hypo tonic solution ?
: If the plant cell is immersed in hyper tonic solution?
(must write your answer after referring to NCERT book or reference book )
Questions for 10th
Q1 Draw labelled diagram ;
Holozoic nutrition in Amoeba
Human digestive system
Q2Make a table and fill all the columns
Q3Define holozoic nutrition and all its five steps
Q4 What is function of Sphincter , Hcl ,mucus ,Bile in digestion?
HOTS
Why is advised not to stay hungry for long hours?
Why do doctors advice people with acidity to take digene ?
What is importance of peristalsis in oesophagus?
What is significance of liver in digestion when it doesn't produce any enzyme?
Name the bacteria which causes peptic ulcer.
Q 1 What is the cell wall made up of ?
Q 2 Explain the following
: If the plant cell is immersed in hypo tonic solution ?
: If the plant cell is immersed in hyper tonic solution?
(must write your answer after referring to NCERT book or reference book )
Questions for 10th
Q1 Draw labelled diagram ;
Holozoic nutrition in Amoeba
Human digestive system
Q2Make a table and fill all the columns
Name of the digestive part
|
Enzyme
/juice produced
|
Substrate
On which it act
|
Product formed
|
mouth
|
|||
oesophagus
|
|||
stomach
|
|||
pancrease
|
|||
liver
|
|||
Duodenum
|
|||
Small intestine
|
|||
Large intestine
|
|||
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