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.