Science, asked by sarkarsusmita641, 7 months ago

[10/9, 10:15 AM] Father: A. Choose the correct answer 1 x 15 = 15
1. The process of photosynthesis converts solar energy into: *
a. Kinetic energy
b. Chemical energy
c. Potential energy
d. Nuclear energy
2. Which of the following is digested by saliva? *
a. Glucose
b. Starch
c. Cellulose
d. Sucrose
3. The length of the small intestine in adult human beings is about: *
a. 1.5 m
b. 2.5 m
c. 7.5 m
d. 4.5 m
4. Which of the following has a tropical climate? *
a. Kashmir
b. Kerala
c. Rajasthan
d. Assam
5. Yeast converts glucose into: *
a. Starch
b. Alcohol
c. Lactic acid
d. Yogurt
6. In liquids, heat transfer takes place by *
a. Radiation
b. Conduction
c. Convection
d. None of these
7. Some stainless steel frying pans are provided with copper bottoms. The reason for this could be that: *
a. Copper bottom makes the pan more durable
b. Such pan appears colourful
c. Copper is a better conductor of heat than stainless steel
d. None of these
8. The wind speed is measured by *
a. Wind vane
b. Barometer
c. Anemometer
d. Hygrometer
9. An athlete attains a maximum speed of 36 km/h. This speed is equal to: *
a. 5 m/s
b. 10 m/s
c. 15 m/s
d. 20 m/s
10. Water cycle does not involve which of the following? *
a. Evaporation
b. Condensation
c. Formation of clouds
d. Rainwater harvesting
11. Products of a neutralization reaction are always *
a. an acid and a base
b. an acid and a salt
c. a salt and water
d. a salt and a base
12. Which of the following sets of substances contains acids? *
a. Grapes, lime water
b.Vinegar, soap
c. Curd, milk of magnesia
d. Curd, vinegar
13. Which of the following is not a type of silk? *
a. Mulberry silk
b. Tassar silk
c. Mooga silk
d. Moth silk
14. Silkworms secrete fibre made of *
a. fat
b. cellulose
c. protein
d. nylon
15. Water which falls from the clouds as rain or snow is called: *
a. condensation
b. precipitation
c. infiltration
d. transpiration
[10/9, 10:19 AM] Father: B. Answer very briefly
2 X 5 = 10
1. Why does running make a man breathe faster? *
2. Identify the animal from the below picture and write down two adaptive features of that. *
Captionless Image
3. Which thermometer is used to measure our body temperature? State the unit in which temperature is commonly measured. *
4. A man riding a bike covers a distance of 40 km in 120 minutes. Calculate the speed of the man? *
5. Why does a turmeric stain on white shirt is turned to red when it is washed with soap? *
C. Answer in brief:
3 X 5 = 15
1. Identify A, B, C, D, E, F and G. Also mention that which parts form upper respiratory tract and which parts form lower respiratory tract? *
Captionless Image
2. What are the three methods of transfer of heat? *
3. What do you mean by the uniform and non-uniform motion of a body? *
4. Which acid is injected into our body by an ant sting that causes pain? A small amount of hydrochloric acid is always produced in the stomach. Is it useful or harmful for us? If excess of acid is produced in the stomach, what should we do? *
5. You are provided with three test tubes A, B and C as shown in figure with different liquids. What will you observe when you put (a) a piece of blue litmus paper in each test tube?(b) a piece of red litmus paper in each test tube?(c) a few drops of phenolphthalein solution to each test tube? *
Captionless Image
D. Higher order thinking skills [HOTS]
1. Read and answer: *
Captionless Image
2. What is the difference between a tornado and a cyclone? 3 *
3. Two figures ‘a’ and ‘b’ are given below. Both are revealing two different human activities which are the cause of depletion of water table. Identify the two acts and explain how these are causing the depletion of water resource. 3 *

Answers

Answered by jevelin

Answer:

1 a

2 b

3 a

4 c

5 a

6 b

7 a

8 c

9 b

10.a

Answered by BrainlyPARCHO

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1. The process of photosynthesis converts solar energy into: *

2. Which of the following is digested by saliva? *

3. The length of the small intestine in adult human beings is about: *

4. Which of the following has a tropical climate? *

5. Yeast converts glucose into: *

6. In liquids, heat transfer takes place by *

7. Some stainless steel frying pans are provided with copper bottoms. The reason for this could be that: *

8. The wind speed is measured by *

9. An athlete attains a maximum speed of 36 km/h. This speed is equal to: *

10. Water cycle does not involve which of the following? *

11. Products of a neutralization reaction are always *

12. Which of the following sets of substances contains acids? *

13. Which of the following is not a type of silk? *

14. Silkworms secrete fibre made of *

15. Water which falls from the clouds as rain or snow is called: *

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