Explore topic-wise MCQs in 3rd Class.

This section includes 1249 Mcqs, each offering curated multiple-choice questions to sharpen your 3rd Class knowledge and support exam preparation. Choose a topic below to get started.

451.

Fire gives _______.

A. heat energy                 
B. (b) light energy
C. both (a) and (b)      
D. sound energy
Answer» D. sound energy
452.

The early man ate ________.

A. raw food    
B. cooked food
C. both (a) and (b)          
D. none of these
Answer» B. cooked food
453.

Man first started to produce fire by _______.

A. striking stones  
B. matchsticks
C. burning petrol             
D. using natural gas
Answer» B. matchsticks
454.

Silk and woollen clothes are often damaged by _______.

A. flies                             
B. insects        
C. bacteria                      
D. animals
Answer» C. bacteria                      
455.

Clothes do not protect us from _______.

A. heat                            
B. cold            
C. blood pressure
D. dust and germs
Answer» D. dust and germs
456.

Cotton cloth is made from ______ of the cotton plant.

A. leaves                          
B. stem          
C. roots                           
D. fruits
Answer» E.
457.

Why did man need vessels?

A. For cooking and storing    
B. For traveling
C. For weapons                         
D. For wearing
Answer» B. For traveling
458.

Which one of the following systems is responsible for producing off springs of its own kind?

A. Excretory system                    
B. Circulatory system
C. Muscular system                     
D. Reproductive system
Answer» E.
459.

Kidneys : Excretory system :: Intestine : ?

A. Respiratory    
B. Muscular       
C. Digestive         
D. Circulatory
Answer» D. Circulatory
460.

Which of the following is located in our cheat?

A. Heart     
B. Kidneys
C. Small intestine
D. Stomach
Answer» B. Kidneys
461.

Digested food is absorbed by:

A. mouth
B. heart
C. water  
D. blood  
Answer» E.
462.

Directions: Fill in the blanks with the most suitable word. There are about __(47)__ taste buds in our tongue. A deaf person has lost his sense of __(48)__ . A piece of sponge can be easily __(49)__ by hand. Our sense of __(50)__ allows us to watch and enjoy programmes on television.

A. 12,000                        
B. 8,000         
C. 10,000            
D. 15000
Answer» D. 15000
463.

Sohan went for a party with his family. Suddenly his younger sister started crying and said that she is having stomachache. What should Sohan do to make her feel comfortable?                                                      

A. Take her to the doctor. 
B. Take her to the police station
C. Get some spicy food for her.          
D. None of the above.
Answer» B. Take her to the police station
464.

Riya is running fast to overtake his brother Ayush who is 100 metre ahead of her. Her heart beat _______.

A. would be slower                      
B. would be faster
C. would beat 72 times a minute          
D. none of these
Answer» C. would beat 72 times a minute          
465.

Above diagram represents an organ which takes in oxygen and gives out carbon dioxide. Name the organ.

A. Small intestine
B. Kidneys       
C. Lungs              
D. Stomach
Answer» D. Stomach
466.

Vijay got stomachache. Which of the following could be the reason?               

A. He ate food at seven in the evening
B. He drank water after eating food.
C. He did not chew the food properly
D. He did not wash his hands properly after eating food.
Answer» D. He did not wash his hands properly after eating food.
467.

Match the following:1. EyesA. Taste2. NoseB. Sight3. TongueC. Hearing4. EarsD. Smell

A. 1-B, 2-C, 3-A, 4-D
B. 1-C, 2-A, 3-D, 4-B
C. 1-B, 2-D, 3-A, 4-C  
D. 1-B, 2-A, 3-D, 4-C
Answer» D. 1-B, 2-A, 3-D, 4-C
468.

Fill in the blanks with the most suitable word. There are __(40)__ bones in a grown up skeleton. The largest bone in our skeleton is called the __(41)__ and it is located on the upper part of our leg. Our feet and __(42)__ have almost half of all of the bones in our body. Joints are where the bones meet, our __(43)__ allow us to move and bend. We have bone marrow inside our bones. The bone marrow is what makes our __(44)__.

A. 208                             
B. 206  
C.   209                             
D. 205
Answer» C.   209                             
469.

Consider the following statements as true or false and mark the correct option A. Our skeleton helps to protect delicate organs in our body. B. Different parts of the tongue are sensitive to different tastes. C. Some of our sense organs do not have nerves in them. D. Light enters the eye through the iris. 

A. FFTT
B. TFTF
C. TTFF
D. FTFT
Answer» D. FTFT
470.

Consider the following statements as true or false and mark the correct option   A. We should touch anything we see because nothing is harmful or poisonous.B. Our skin is the largest organ in our body.C. We can run fast because our senses are working very well.D. We know a knife is sharp by looking at it

A. FTFF
B. TFTF
C. FFTT
D. TTFF
Answer» B. TFTF
471.

Our stomach is located:

A. in the head.                          
B. in the left side of the body.
C. in the right side of the body.          
D. below the abdomen.
Answer» C. in the right side of the body.          
472.

The number of muscles present in our body are:

A. 106                       
B. 206
C. 600         
D. 700
Answer» D. 700
473.

The bone present inside the head is called _______.

A. skull           
B. spine
C. rib cage                      
D. vertebral column
Answer» B. spine
474.

Try solving the following riddles and choose the best option C. We take oxygen that your body needs from the air and put it in your blood stream. We also take carbon dioxide that is in your blood and send it out of your body. What are we?

A. Stomach                     
B. Heart         
C. Kidneys                       
D. Lungs
Answer» E.
475.

Try solving the following riddles and choose the best option B. I am always moving and I never get tired. I pump blood to all parts of your body. What am I?

A. Liver                           
B. Heart     
C. Kidneys                       
D. Stomach
Answer» C. Kidneys                       
476.

To enjoy a sweet candy, it must be placed in which part of the tongue?

A. Front     
B. Middle
C. Innermost         
D. Below
Answer» B. Middle
477.

Try solving the following riddles and choose the best option A. I hold your body parts. I have pores so sweat can escape your body. I am filled with nerves that help you to sense temperature and feel the things around you. What am I?

A. Large intestine            
B. Skin
C. Lungs                        
D. Liver
Answer» C. Lungs                        
478.

If we add a lot of green leaves and vegetables to our diet, we will grow:

A.  fat and round
B.  healthy and disease free  
C.  strong and muscular
D.  all of these
Answer» C.  strong and muscular
479.

Directions: Using the clues unscramble the letters and find the organ systems. B. Young ones are produced by

A. circulatory                   
B. reproductive   
C. nervous                       
D. skeleton
Answer» C. nervous                       
480.

Which of the following body parts are called 'Gateways of Knowledge'?

A. Body systems
B. Sense organs  
C. Legs                     
D. Hands
Answer» C. Legs                     
481.

Directions: Using the clues unscramble the letters and find the organ systems. A. Our body gets its shape from__________.

A. nervous                       
B. circulatory     
C. skeletal      
D. reproductive
Answer» D. reproductive
482.

Match the following and select the correct answer. System FunctionA.Circulatory systemi.Helps in production of offspringB.Skeletal systemii.Helps the body to moveC.Reproductive systemiii.Helps in the movement of bloodD.Respiratory systemiv.Helps in exchange of air 

A.  A-iii, B-iv, C-i, D-ii            
B.  A-iii, B-ii, C-i, D-iv  
C.  A-iv, B-iii, C-i, D-i
D. A-iii, B-i, C-iv, D-ii
Answer» C.  A-iv, B-iii, C-i, D-i
483.

Which sense organ will help you to: B. find a candle in a dark room.

A. Ear                              
B. Eyes           
C. Tongue                       
D. Skin
Answer» E.
484.

Which of the following carries oxygen to all the parts of the body?

A. Brain    
B. Muscles
C. Blood    
D. Nerves
Answer» D. Nerves
485.

Roshan wants to become healthier. Which of these would not help him?

A. Regular exercise                      
B. Eating healthy food
C. Using car instead of walking  
D. Drinking lots of water and juice.
Answer» D. Drinking lots of water and juice.
486.

The heart pumps blood into tubes called ____.

A. blood vessels   
B. cells           
C. nerves                         
D. all of the above
Answer» B. cells           
487.

The system which helps us in taking food and making it ready for use by the body is:

A.  digestive system  
B. circulatory system
C. reproductive system
D. muscular system
Answer» B. circulatory system
488.

How many bones are present in a human body?

A. 200                             
B. 150          
C. 206                 
D. 350
Answer» D. 350
489.

The reproductive system helps us to:

A.  produce babies  
B.  digest the eaten food
C.  circulate the blood in our body
D.  remove waste products from the body
Answer» B.  digest the eaten food
490.

On average 40% of your body weight is in____.

A. Bones                         
B. Nerves        
C. Muscles           
D. Blood
Answer» D. Blood
491.

Match the following excretory organs and their products.1. KidneysA. sweats2. LungsB. urine3. SkinC. carbon dioxide

A.  1-A, 2-B, 3-C                     
B.  1-B, 2-C, 3-A  
C. 1-C, 2-A, 3-B     
D. 1-C, 2-B, 3-A
Answer» C. 1-C, 2-A, 3-B     
492.

Pick the incorrect match

A. A blocked nose \[\to \] the breathing system
B. An upset stomach \[\to \] the digestive system
C. A heart attack \[\to \] the muscular system
D. A fractured leg \[\to \] the skeletal system
Answer» D. A fractured leg \[\to \] the skeletal system
493.

The stomach is about 8 inches long and is a sac that is shaped like the letter "j". What is food mixed with when it is in the stomach?

A. Enzymes                     
B. Acids         
C. Saliva                         
D. Germs
Answer» C. Saliva                         
494.

The air we breathe out has more:

A. oxygen               
B. water
C. blood  
D. carbon dioxide  
Answer» E.
495.

The flow diagram given below represents which one of the following system? Mouth \[\to \] Food pipe \[\to \] Stomach \[\to \] Small intestine \[\to \] large intestine

A. Digestive System      
B. Respiratory System
C. Sensory System                    
D. Nervous System
Answer» B. Respiratory System
496.

How does the respiratory system deliver oxygen to different parts of the body?

A. By breathing                         
B. Through circulation
C. By inhaling carbon-dioxide            
D. By inhaling nitrogen
Answer» C. By inhaling carbon-dioxide            
497.

Which of the following system receives messages from the sense organs and sends, orders to different parts of the body?

A.  skeletal system
B.  circulatory system
C.  nervous system  
D.  excretory system
Answer» D.  excretory system
498.

What is the main function of the respiratory system?

A. To break food down                 
B. Supply the blood with oxygen
C. Circulate the blood                  
D. To digest the food
Answer» C. Circulate the blood                  
499.

The system which forms the framework for our body is:

A.  circulatory system
B.  excretory system
C.  reproductive system
D.  skeletal system  
Answer» E.
500.

Exchange of gases like carbon-dioxide and oxygen takes place in the ___ of the human body.

A. nostrils                        
B. heart
C. lungs            
D. rest of the body
Answer» D. rest of the body