REVISION QUESTION FOR CLASS 6

Chapter4:      Sorting Materials into Groups

I. Multiple Choice Questions carrying one mark each:

(1) Tick the material which is man ‐made:

(a) fruits	(b) cereals
(c) glass	(d) wood
(2) Tick the material which is hard:
(a) cotton	(b) sponge
(c) metal	(d) all of these
(3) An example of soluble substance is:
(a) sand	(b) wax
(c) chalk	(d) salt

(4) A gas that comes out when you open an aerated drink bottle is:

(a) carbon dioxide (b) oxygen	(c) nitrogen	(d) hydrogen
(5) An example of a conductor is:
(a) paper	(b) wood
(c) metal	(d) rubber

2.Write True (T) or False (F)                                            carrying one mark each:

(a)Water is more volatile than ether.

(b)Carbon is a malleable substance.

(c)All solids are good conductors of heat.

(d)Liquids and gases are poor conductors of heat.

(e)Early man covered his body with leaves and skin of animals.

3.Fill in the Blanks                                               carrying one mark each:

(a)…………… helps to understand similarities and dissimilarities between objects.

(b)…………… is used to protect woolen clothes from insects and has a characteristic odour.

(c)Metals have a shiny appearance, we can say that they have a ……………………… look.

(d)………………. Is miscible in winter while cooking oil is ……………………….. .

(e)We can see through air, it is ………………….

4.Answer in one line only carrying two marks each:

(a)Define classification.

(b)What is a brittleness?

(c)What is a translucent object?

(d)Define conductivity.

(e)What is a soluble substance?

(f)What is magnetic substance?

(g)How are transparent objects different from opaque objects?

(h)Which of the following is not soluble in water?

(i)Chalk    (ii) common salt      (iii) Sugar       (iv) Milk             (v) Ink.

(i)Give two examples of objects which are made of more than one material.

(j)Which of the following materials is not suitable for making a bucket:

(i) Plastic

(ii) Steel

(iii) Paper

(iv) copper

(k)Name two gases, two solids and two liquids which are soluble in water.

(l)What are translucent objects? Give examples.

6.Answer in two or three lines only carrying three marks each:

(a)Why do metal objects lose their luster after a while?

(b)Why are quilts made from unspun cotton?

(c)Why is glass called a brittle substance?

(d)Distinguish between miscible and immiscible liquids.

(e)Write three advantages of grouping in classifying materials?

(f)Classify the following in different ways:

(i) Your clothes

(ii) Names in a phone book

(iii) Utensils in your kitchen.

(g)Give two examples to explain the same things can be made from different materials.

(h)Write seven ways in which materials can be grouped or classified.

(i)  Give one similarity between wood and oxygen.

(j)Why does wax float on water while sand settles down

REVISION QUESTION FOR CLASS 7

                    1. Nutrition in Plants

 Q 1 Name a plant that has both autotrophic as well as heterotrophic mode of nutrition.                                                    Mark (1)
 Q 2 Name the green pigment that helps the leaves to capture sunlight.                                                                   Mark (1)
 Q 3 What is a lichen?                                              Mark (1)
 Q 4 What is the stored form of carbohydrates in plants? Mark (1)
 Q 5 Why in the rainy season does a loaf of bread turn blue, brown or greenish?                                                                 Mark (1)
 Q 6 Write the chemical equation representing the process of photosynthesis.                                                         Marks (2) 
Q 7 How are nutrients replenished in the soil?        Marks (2)
 Q 8 Why does the pitcher plant feed on insects though it is green?                                                                                    Marks (2) 
Q 9 How would you test the presence of starch in leaves? Marks (2)
 Q 10 What do you mean by heterotrophs?                Marks (2) 
 Q11 What is Autotrophic nutrition? Give an example of autotrophs.                                                                 Marks (2)
 Q 12 Why do organisms need to take food?             Marks (2)
 Q 13 Define nutrition.                                              Marks (2)
 Q 14 What are nutrients?                                          Marks (2) 
Q 15 (i) How do fungi appear suddenly during the rainy season? 
(ii) What is the mode of nutrition adapted by fungi?     Marks (3) 
Q 16 What is the difference between parasites and saprotrophs? Give an example for each.                                          Marks (3)
 Q 17 (i) Define the process of photosynthesis.
 (ii) What is site of the photosyntheis in plants?        Marks (3)
 Q 18 What are insectivorous plants? Explain with example. 
                                                                                    Marks (5) 
Q 19 Draw the diagram of: (a) Stomata (b) Schematic diagram showing photosynthesis                                           Marks (5)
 Q 20 What is symbiosis? Explain this relationship with help of two examples.                                                                 Marks (5)
 Q 21 Why are leaves called the food factories of plants? Explain.                                                                                       Marks (5) 

REVISION QUESTION FOR CLASS 8

                                 

	Cell structure and function
Multiple choice question	(1- marks each)

le Cell was discovered by :
	i.	Louis Pasteur ii. Robet hook			iii. Fleming iv. none of these
2.	These are the structural and functional units of life:
	i.	Tissue	ii. Cell	iii. Organ	iv. Organism
3.	An example of a unicellular cell:
	i.	Euglena	ii. Tapeworn		iii. Grasshopper	iv. All of these
4.The smaller cell is :
	i. Mycoplasma		ii. Ant	iii. Algae	iv None of these

5.The smallest cell is found in :

i.WBC ii. RBC iii. Platelets iv. All of these 6.The large animal cell is :

i.	Ostrich egg ii.Hen’s egg iii.Snake’s egg iv.None of these

7.Cell that change their shape continuously:

i.Amoeba ii.WBC iii.Snake’egg iv. None of these 8.The outermost covering of the body of the cell is called :

i. Cell membrane ii. Cytoplasm iii. Nucleus iv. None of these fill in the blanks :

i.Locomotory organ in paramoecium are……… .

ii.Vacloroplasts are present in ………..cell.

iii.Choloroplasts are present in…...…...cell.

iv.……….is a filamentous algae with identical cell.

i.Cell wall is made of………… .

ii.Mitochondria contain………..that are needed for respiration

iii.All cell arise from ……….. Cell only

iv.Cell were first observe in cork by ……….

v.…………. Is seperated from cytoplasm by a nuclear memorane.

vi.Green plastids containing chlorophyll are called……. .

VERY SHORT ANSWER QUESTION

(1MARKS EACH)

1.Name two unicellular organisms ?

2.Name two Multicellular organisms ?

3.Name a cell which can be seen by an unaided eye ?

4.Name the structural unit of an organism ?

5.Who discovered the cell and when ?

6.Name the part of cell which help in control of the activities ?

7.Write the name of unit of inheritance in livings ?

8.Which part of the cell gives the shape to a cell ?

9.What is protoplasm ?

10.Name two cells which can change their shape ?

SHORT ANSWER QUESTION	(2 MARKS EACH)
1.Why is the mitochondria called the ‘powerhouse’ of the cell?
2.What is the function of chloroplast?

3.Write the function of the cell wall? 4.What are the chromosomes?

5.How do unicellular organism differ from multicellular organism? 6.Distinguish between prokraryotic cells and eukaryotic cells? 7.Distinguish between plant cell and animal cell?

8.What is plastids?write their function?

9.Why could cells not be observed before 17th century ? 10.Cells are the building blocks of the life ?

ANSWER THESE QUESTION

(3 MARKS EACH)

1.Explain the structure of a cell ?

2.Explain the structure of onion cell with the help of a slide ?

3.Write the functions of mitochondria, golgi bodies and ribosomes ?

4.Explain prokaryotic and eukaryotic cells ?

5.What is gene ? What is its function ?

Long answer question:

(5 marks each)

1.Draw well labelled diagram of animal cell and plant cell?

2.Draw different types of cell in humans?

3.Draw plant and animal cell according to their parts?

4.Make a sketch of the human nerve cell. What function do nerve cell perform?.

5.Draw the structure of a cell observed in an onion peel?write the function of cell wall, cell membrane ands cytoplasm?

REVISION QUESTION FOR CLASS 6

class 6                       components of food Revision

I. Multiple Choice Questions carrying one mark each –

(1) Which of the following food turns blue‐black with iodine solution?

(a) onion	(b) sugar
(c) potato	(d) groundnut

(2) Which of the following is a body‐building food ?

(a) fruits	(b) oils
(c) pulses	(d) cereals

(3)	Which of the following require a diet rich in proteins?
(a) labourers		(b) office‐goers
(c) children		(d) old men
(4)	Which of the following is not a processed food?
(a) pizza (b) samosa (c) noodles		(d) rice
(5)	The liquid used to test the presence of starch in food is:
(a) copper sulphate		(b) iodine
(c) caustic soda		(d) glycerine

2. Match the following carrying one mark each:

(1)	Iron	(a) rickets
(2)	Vitamin D	(b) beri‐beri
(3)	Vitamin B	(c) goiter
(4)	Iodine	(d) scurvy
(5) Vitamin C		(e) anaemia

3.Write True (T) or False (F) carrying one mark each:

(a)Milk is a source of plant proteins.

(b)The glands in the neck become swollen when a person suffers from goitre.

(c)Carbohydrates have no nutritive value.

(d)Marasmus is caused mainly due to under‐nourishment.

(e)Water forms 80% of our body weight.

4.Fill in the Blanks carrying one mark each:

(a)…………… is considered a complete food.

(b)Ritik rubs a food item on a white paper, the paper becomes translucent. The food item is rich in ………………….. .

(c)…………………. Proteins are obtained from products like milk, cheese, egg, fish.

(d)Salts of …..............and………………. are required for making bones and teeth hard and strong.

(e)Lack of vitamins and minerals in our diet causes several……………………… diseases..

5.Answer in one line only carrying two marks each:

(a)Define food habits.

(b)Define roughage.

(c)Which nutrients are called energy‐giving foods?

(d)Why are fats important for the body?

(e)Which vitamin is called ‘sunshine vitamin’?

(f)Name the nutrients that protect your body from diseases.

(g)Define malnutrition.

(h)Define undernutrients.

(i)Define balanced diet.

(j)How can PEM be controlled and prevented?

(k)List the symptoms a child suffering from rickets will show.

(l)Name the deficiency disease which is very common in the children of beggars and labourers.

(m) What symptoms does a child suffering from kwashiorkar show?

(n)Name the mineral that is essential for the formation of thyroxine.

NUTRITION IN PLANTS

Fill in the blanks:

1. The components of food which are necessary for our body are called _______________

2. Green plants synthesise their own food themselves by the process of __________________.

3. ______________________ is the mode of taking food by an organism and its utilization by the body.

4. Complex chemical substances such as ______________ are the products of photosynthesis.

5. ___________________ gas is produced during photosynthesis.

6. Organisms that are dependent on others for their nutrition are called ______________________

7. _________________ are the tiny pores present on the surface of the leaves and are surrounded by guard cells.

8. ____________________is the ultimate source of energy for all living organisms.

9. Organisms which derive their nutrition from dead decaying matter are called _______________.

10. Some organisms live together and share shelter and nutrients, this is called _____________________.

11. Carbohydrates are made up of _________,__________ and __________.

Name the following :

1. A bacterium that can take atmospheric nitrogen and convert it into a soluble form.

2. An insectivorous plant.

3. The mode of nutrition in mushrooms.

4. The indicator used to test the presence of starch in leaves.

              CLASS 6

              COMPONENTS OF FOOD.

FILL IN THE BLANKS

1. T he main carbohydrates found in our food are in te form of __________ and ______________.

2. Carbohydrates and fats provide ______________ to our body .

3. Foods containing carbohydrates and fats are also called ______________ giving foods.

4. Foods containing proteins are often called _________________________ foods.

5. Vitamin ________ gets easily destroyed by heat during cooking.

6. Over eating fat rich food leads to ________________

7. Deficiency diseases can be prevented by taking a _______________ diet.

8. _____________ help in protecting our body against diseases.

NAME THE FOLLOWING

1. Two sources of carbohydrates . __________________ _____________

2. Two sources of fats __________________ _____________

3. Two sources of protein __________________ ____________

4. Two sources of vitamin C __________________ ____________

5. Disease caused due to deficiency of iron ______________

6. Disease caused due to deficiency of vitamin A _____________

7. Disease caused due to deficiency of iodine_____________

TRUE OR FALSE

1. Dietary fibres are also known as roughage. _________

2. Minerals are needed by our body in large quantity. ___________

3. Our body prepares vitamin D in presence of sunlight. __________

DEFINE THE FOLLOWING

1Nutrients 2 Balanced diet 3 Deficiency diseases

DISTINGUISH BETWEEN

Proteins and Fats

EXTRA QUESTIONS

1Write the three groups of food and give examples ( 2 m )

2 Write the test to show the presence of protein in any food item (5 m)

3 Write the test to show the presence of starch in any food item (2 m)