CLASS 6, WORKSHEET CHAPTER - 12 (Light, Shadow and Reflection)

Chaper – 12 : Light, Shadow and Reflection  

Question 1. Suggest a situation where we obtain more than one shadow of an object at a time. 

Question 2. 0n a sunny day, does a bird or an aeroplane flying high in the sky cast its shadow on the ground? Under what circumstances can we see their shadow on the ground? 

Question 3. Three identical towels of red, blue and green colour are hanging on a clothesline in the sun. ‘ What would be the colour of shadows of these towels? 

Question 4. Using a pinhole camera a student observes the image of two of his friends, standing in sunlight, wearing yellow and red shirt respectively. What will be the colours of the shirts in the image? 

Question 5. Explain that light has the property of rectilinear propagation. 

Question 6. Rahul stands in front mirror and observes all details but when he stands in front of opaque object he cannot observe details. What is the reason behind this? Write difference between shadow and image. 

Question 7. What are transparent, translucent and opaque objects? Give example of each.  

Question 8. Draw Diagram of the following :  

(a) Solar Eclipse  

(b) Lunar Eclipse  

(c) Ray  

(d) Beam of Light 

Question 9. Show and activity to exhibit that light travels in a straight line.  

CLASS - 6, Worksheet Chapter - 5 (Separation of Substances)

Chapter - 5 : Separation of Substances  

Question 1. Fill in the blanks. 

1. A mixture of iron fillings and sand can be separated by using a _________.  

2. Particles that settle down in a mixture after some time form the _________.  

3. Transfer of clear liquid to another container after the process of sedimentation is called ________.  

4. In a mixture of sawdust and water, ________ is retained by the filter paper.  

5. A fine _______ cloth can be used a filter.  

6. Oil is _______ than water.  

7. _________ liquids are separated by distillation.  

8. A mixture of oil and water is an example of ________ liquids.  

Question 2. Sedimentation and decantation is a method used for separating heavier insoluble substances from water. Find out where this method is used in day-to-day lives. For examples, you can enquire your mother if she uses this method while cooking. List at least five uses of the method.  

Question 3. Differentiate between homogeneous and heterogeneous mixtures. Give example of each.  

Question 4. Which method of separation should be used to separate the following mixtures?  

1. Grain and husk                                                  ____________________________ 

2. Grain from stalks                                               ____________________________ 

3. Assorted candies                                               ____________ 

4. Grain and chaff  

5. Bran and wheat flour 

6. Sand and gravel  

7. Sand and powered leaves  

Question 5. Answer the following in (25-35 words)  

(a) A Mixture  

(b) Components of a mixture with the help of an example.  

(c) Melting point  

(d) Boiling point  

Question 6. What happens when the polluted water is allowed to stand for 10 minutes?  

Question 7. How is common salt obtained from sea water?  

Question 8. Describe a simple experiment to show the distillation of water.  

Question 9. A saturated solution of sugar in water is prepared. The temperature of water is lowered by 5°C. Will the solution continue to be saturated? Give Reasons.  

Class 6 - Worksheet, Chapter - 2 (Components of Food)

Chapter - 2 : Components of Food 

Question 1. Multiple Choice Question – 

I. Which one of the following food item does not provide dietary fibre?
(a) Wholegrains(b) Whole pulses(c) Fruits and vegetables(d) milk 
II. Which of the following sources of protein is different from others?
(a) Peas(b) Gram(c) Soyabeans(d) Cottage cheese (paneer)
III. Which of the following nutrients is not present in milk?
(a) Protein(b) Vitamin C(c) Calcium(d) Vitamin D
IV. Read the food items given below.
(i) Wheat(ii) Ghee(iii) Iodised salt(iv) Spinach (palak)
Which of the above food items are “energy giving foods”?
(a) (i) and (iv)(b) (ii) and (iv)(c) (i) and (ii)(d) (iii) and (iv)
V. Read the following statements about diseases.
(i) They are caused by germs.
(ii) They are caused due to lack of nutrients in our diet.
(iii) They can be passed on to another person through contact.
(iv) They can be prevented by taking a balanced diet.
Which pair of statements best describe a deficiency disease?
(a) (i) and (ii)(b) (ii) and (iii)(c) (ii) and (iv)(d) (i) and (iii 

Question 2. Fill in the blanks -
(a) Egg yolk is rich in _____ and egg albumin is rich in______.
(b) Deficiency diseases can be prevented by taking a______.
(c) Eating too much of fat rich foods may lead to a condition called______.
(d) The component of food that does not provide any nutrient to our body and yet is essential in our food is______.
(e) The vitamin that gets easily destroyed by heating during cooking is ______. 

(f) we are advised to eat fruits along with their _______.  

(g) Excessive loss of water from body leads to _______. 

Question 3. While using iodine in the laboratory, some drops of iodine fell on Anuradha’s socks and some fell on her teacher saree. The drops of iodine on the saree turned blue black while their colour did not change on the socks. What can be the possible reason? 

Question 4. Reema and Kavita peeled some potatoes and cut them into small pieces. They washed and boiled them in water. They threw away the excess water and fried them in oil adding salt and spices. Although the potato dish tasted very good, its nutrient value was less. Suggest a prevention for cooking vegetables such that it will not lower the nutrients in them. 

Question 5. Read the items of food listed below. Classify them into carbohydrate rich, protein rich and fat rich foods and fill them in the given table. Moong dal, fish, mustard oil, sweet potato, milk, rice, egg, beans, butter, butter milk (chhachh), cottage cheese (paneer), peas, maize, white bread. 

Carbohydrate Rich Food Item (A)	Protein Rich Food Item (B)	Fat Rich Food Item (C)

Question 6.‘Water does not provide nutrients, yet it is an important component of food’. Explain. 

Question 7. Name the following: 

a.  Carbohydrates that are digested quickly and thus provide instant energy.  

b. A complex carbohydrate that fulfils majority of our carbohydrate requirements.  

c.  Energy-giving foods.  

d. Chemical substances present in food.  

e.  Two important components of food other than the nutrients.  

f.   Extra carbohydrates are stored as these in the body.  

Question 8. Explain the importance of the following vitamins for the body.  

(a) Vitamin A                   (b) Vitamin K                 (c) Vitamin D                   (d) Vitamin C  

class 7 holiday homework

                         CLASS VII

SUBJECT SCIENCE

             NUTRITION IN ANIMALS

MULTIPLE CHOICE QUESTION:- (1 MARKS EACH)

1. The walls of the large intestine absorb.

i. cellulose ii. Water iii. Proteins iv. Digested food

2. The organ that produces bile is the.

i. liver ii. Stomach iii. Pancreas iv. Gall bladder

3. Finger-like projections called villi are present in the .

i. small intestine ii. Large intestine iii. Stomach iv. None of these

4. The front four teeth in each jaw are called

i. canines ii. Incisors iii. Molars iv. Premolars

5. The gastric glands of the stomach secrete

i. acetic acid ii. Nitric acid iii. Hydrochloric acid iv. All of these

VERY SHORT ANSWER TYPE QUESTIONS (1 MARKS EACH)

1. What does gastric juice help to convert ?

2. What is the main function of teeth ?

3. What is O.R.S. ?

4. What is Oesophajus ?

5. Why does bread taste sweet when chewed for some time ?

ANSWER THESE QUESTIONS ( 3 MARKS EACH)

1. What are villi? What is their location and function?

2. Why do we get instant energy from glucose?

3. Can we survive only on raw, leafy vegetables/grass? Discuss.

4. Where are the salivary glands located and what is their functions ?

 FIBRE TO FABRIC

MULTIPLE CHOICE QUESTION ( 1 MARKS EACH)

1. The silkworm is (a) a caterpillar, (b) a larva.

i. a ii. b iii. Both a and b iv. Neither a nor b

2. Which of the following does not yield wool?

i. Yak ii. Camel iii. Goat iv. Woolly dog

3. The odd one out:

i. nylon ii. Wool iii. Silk iv. Cotton

4. What materials were used for clothes in ancient time?

i. leaves ii. Barks iii. Skin of animals iv. All of these

5. Clothes do not protect us from:

i. heat ii. Dust iii. Cold iv. High blood pressure

VERY SHORT ANSWER TYPE QUESTIONS (1 MARKS EACH)

1. Why is it said that ‘wool breathes’?

2. Define the term fiber

3. From where in the silk worm are threads produced ?

4. What is the function of Carding Machine ?

5. How is the fleece removed from the sheep’s Body ?

ANSWER THESE QUESTIONS ( 3 MARKS EACH)

1. Write about the unusual qualities that wool has , which makes it a very useful fiber?

2. State the difference between natural fiber and man made fibers ?

3. Why do we prefer wearing cloths made of wool and dark in color in winters ?

4. What is meant by the following terms? (i) Rearing (ii) Shearing (iii) Sericulture

5. What gives silk a lustrous appearance ? And write some uses of silk?

Subject science

Chapter -Respiration

Very short answer questions

1.    Pick the odd one out:

            Lungs Bronchi,         Heart,                         Alveoli

2.    Cellular respiration is a ____________ process. (Physical/Chemical)

3.    What disease does a person suffer when the air passage contract and the lining smell and breathing becomes difficult?

4.    Name the site for exchange of gases in lungs.

5.    The colour of blood is red due to ___________

Short Answer questions

6.    Complete the series (Process of Inhalation)

Nostrilsà                       àwind pipeàTracheaà

 

 Blood                                                                         Bronchiole

7.    Shreya feels that after she sweats a lot, her body becomes cool. Is she right? If yes,Why?

8.    Unscramble the words to get the parts of respiratory system.

a.  SONRTILS                _________________

b.  GUNLS                      _________________

c.  RTACAEH                 _________________

d.  RBONHCI                  _________________

8.    The chemical process of breakdown of food in the presence of          oxygen to produce energy is called respiration. It has two     types - aerobic and anaerobic

a.    Write the word equation for Aerobic Respiration.

b.         Which types of respiration produce more energy? (Aerobic /Anaerobic)

9. Reena coming back to class after games period feels her heart beat to be increased . Why does it happen?

10. Label the diagram

11.       Terms ‘Breathing’ and ‘Respiration’ sound same to Aushul. Do you agree with this? Justify your answer

LONG ANSWER QUESTIONS

12.       a) Represent the process of Diffusion of gases in and out of a capillary through diagram.

            b) State any two differences in Aerobic  and Anaerobic respiration.

Ch:      Reproduction in plants

    Q1  Pick the odd one out .Give reason?

     Spore formation ,budding ,fragmentation , grafting  

Q2  Name

     a) Two agents of pollination ------------ ,------------

     b) Two plants whose roots give

          rise to new plant.              ------------- ,-----------

     c) Two artificial methods of vegetative

            reproduction.                  ----------------,---------

Q3  Unscramble the letters to detect the word related to reproduction

   a) Product of male and female gamete         GTYZOE

  b) Female reproductive organ of plant            IPTSLI

  c) Flowers having both reproductive organs   EXBUISAL

  d) Type of reproduction in spirogyra      GERATFAMTINON

Q4 Differentiate between the two types of reproduction in plants.

Q5 A beggar begs for some eatables from Riya.She finds some bread in her kitchen. But these are covered with some greenish black patches. So she gives some fruits to him.

 a)What are these greenish black patches found on the bread called? How do they reproduce?

 b) What value you learn from Riya?

  Q6 Draw a  diagram of a flower ‘Mark in it

(i) male reproductive part

(ii) female reproductive part

(iii) Sepals

(iv) petals

 b) Why are the petals of flower so colourful

Q7 Give difference between unisexual and bisexual flowers

Q8 Sanjana had following parts of rose plant a leaf, roots,a branch, a flower,a bud and pollen grains .which of them can be used to grw a new rose plant ?

Ch: Time and motion

Q1)Unscramble the letters to answer the following

a)    Change of position of a body with respect to its surroundings.    NOTIOM                        --------------

b)    Time taken by pendulum to complete the                       oscillation.       EMIPTREDOI                  ---------------

c)    Works on the principal of inward or outward regulated flow of water. CLCKO TWRAE               ----------------

d)    Instrument to measure speed of vehicle.

                          MODEPSERETE    

Q2)Draw a distance time graph of a moving car from the following data. What type of motion does it indicate?

Time in minutes	Distance in Km from starting point
5	2
10	5
15	7
20	10

Q3)Draw a diagram of simple pendulum and explain its working.

            Q4) Convert 15m/s into km/hr.

           Q5) A bus travelled  280 km in 4 hours and car covered distance of 600 km in 5 hours. Find speed of train and bus. Which one of the two travels faster?   

     Q6)   A simple pendulum consist of weight or ------------( like a small ball) tied to a string.the other end of ---------------- is tied to a rigid support. When the pendulum is at rest,it is in the -------------- position. The pendulum is said to have made one -------------- if it moves from position A to B through o and back to C through A .The time taken by the pendulum to complete one oscillation is called -----------------

Q7) what do you mean by statement “car is moving with a speed of 50 Km /hr”

Q8Show the shape of

a)    Distance time graph for the motion when the car is parked on side road

b)    When car is moving with constant speed

Q9 a simple pendulum takes 15 seconds to complete 5 oscilltions .What is the time period of simple pendulum ?

11.