Body Movement
Class 6th Science NCERT Exemplar Solution
- Which of the following parts of our body help us in movement? (i) Bones (ii) Skin (iii)…
- Which of the following joints is immovable?A. Shoulder and arm B. knee and joint C. upper…
- Which of the following organisms does not have both muscles and skeleton for movement?A.…
- Why Underwater divers wear fin-like flippers on their feetA. swim easily in water B. look…
- Snail moves with the help of itsA. shell B. bone C. muscular foot D. whole body…
- How many muscles work together to move a bone?A. One B. Two C. Three D. Four…
- Name the type of joint of your hand which help you to grasp a badminton racquet.…
- What would have happened if our backbone was made of one single bone? ●…
- Provide one word answer to the statements given below. 1. Joint which allow movement in…
- Write the type of joint which is used for each of the following movements : (a) A cricket…
- Match the name of the animals given in Column I with its body parts used for movement…
- Given below is a list of different types of movement in animals. Running, Jumping,…
- Boojho fell off a tree and hurt his ankle. On examination the doctor confirmed that the…
- Bones are hard structures and cannot be bent. But, we can still bend our elbow, knee, etc.…
- Which type of movement would have been possible if (a) our elbow had a fixed joint? (b) we…
- Earthworms are known as ‘farmer’s friends’. Why?
- (a) Unscramble the jumbled words and write them in the blank spaces provided. (i) neosb…
- Read the following paragraph and fill in the blanks using the words you unscrambled.…
- How is the skeleton of a bird well-suited for flying?
- In Fig. 8.2 there are snakes of the same size slithering on the sand. Can you identify…
Multiple Choice Questions
Question 1.Which of the following parts of our body help us in movement?
(i) Bones
(ii) Skin
(iii) Muscles
(iv) Organs
Choose the correct answer from the option below.
A. (i) and (iii)
B. (ii) and (iv)
C. (i) and (iv)
D. (iii) and (ii)
Answer:
Question 2.
Which of the following joints is immovable?
A. Shoulder and arm
B. knee and joint
C. upper jaw and skull
D. Lower jaw and upper jaw
Answer:
Example of fixed joint.
The Joints at which bones cannot move are called fixed joints.
Question 3.
Which of the following organisms does not have both muscles and skeleton for movement?
A. dog
B. snail
C. earthworm
D. human being
Answer:
Explanation: Bones are absent in both Earthworm and Snail.
But snail has a rounded structure called the shell, on its back. It is the outer skeleton.
While Earthworm does not have any skeleton.
Question 4.
Why Underwater divers wear fin-like flippers on their feet
A. swim easily in water
B. look like a fish
C. walk on water surface.
D. walk over the bottom of the sea (sea bed)
Answer:
Underwater divers wear fin-like flippers on their feet to make their body to get streamlined which helps to reduce the drag of water acting on their body, thus helping them to move easily and quickly in deep water.
Question 5.
Snail moves with the help of its
A. shell
B. bone
C. muscular foot
D. whole body
Answer:
● Shell does not help in movement, it is to be dragged along.
● Shell has a muscular foot and an opening through which head comes out.
● This muscular foot helps in movement.
Question 6.
How many muscles work together to move a bone?
A. One
B. Two
C. Three
D. Four
Answer:
As Muscles work in pairs
Very Short Answer Questions
Question 1.Name the type of joint of your hand which help you to grasp a badminton racquet.
Answer:
● Elbow Joint. It is hinge joint which allows movement only in one direction.
● Elbow joint allows back and forth movement. A strong grasp requires the back movement of elbow joint.
Question 2.
What would have happened if our backbone was made of one single bone?
●
Answer:
A single bone cannot bend at its own. Movement occurs only where two bones meet to form a joint.
● If backbone were a single bone, there would have been no movement.
Question 3.
Provide one word answer to the statements given below.
1. Joint which allow movement in all directions.
2. Hard structure that forms the skeleton.
3. Part of the body with a fixed joint.
4. Help in the movement of body by contraction and relaxation.
5. Bones that join with chest bone at one end to the backbone at the other end.
6. Framework of bones which gives shape to our body.
7. Bones which enclose the organs of our body that lie below the abdomen.
8. Joint where our neck joints the head.
9. Part of the skeleton that forms the earlobe.
Answer:
1. Ball and socket joint
2. Bones
3. Upper jaw with skull
4. Muscles
5. Ribs
6. Skeleton
7. Pelvic bone
8. Pivotal joint
9. Cartilage
Question 4.
Write the type of joint which is used for each of the following movements :
(a) A cricket bowler bowls the ball.
(b) A girl moves her head in right and left direction.
(c) A person lifts weights to build up his biceps.
Answer:
1. Ball and socket joint
2. Bones
3. Head
4. Muscles
5. Ribs
6. Skeleton
7. Pelvic bone
8. Pivotal Joint
9. Cartilage
10. (a) Ball and socket joint
(b) Pivotal Joint
(c) elbow Joint
Short Answer Questions
Question 1.Match the name of the animals given in Column I with its body parts used for movement given in Column II
Answer:
(a) Human being – legs
(b) Cow - limbs
(c) Snake – whole body
(d) Eagle - wings
(e) Fish – fins
Question 2.
Given below is a list of different types of movement in animals.
Running, Jumping, Walking, Slithering,
Crawling, Flying, Swimming, Creeping
Write the type of movement seen in each animal.
(a) Duck
(b) Horse
(b) Kangaroo
(d) Snail
(e) Snake
(f) Fish
(g) Human beings
(h) Cockroach
Answer:
(a) Duck – crawling (crawling movement occurs with legs)
(b) Horse – running/walking
(c) Kangaroo – Jumping
(d) Snail – creeping (creeping movement can occur with or without legs)
(e) Snake – Slithering (Slither means snake-like)
(f) Fish - Swimming
(g) Human beings – walking/running
(h) Cockroach – Flying
Question 3.
Boojho fell off a tree and hurt his ankle. On examination the doctor confirmed that the ankle was fractured. How was it detected?
Answer:
X Ray shows the shape of the bones. It can help to detect any possible injuries to the bone.
Question 4.
Bones are hard structures and cannot be bent. But, we can still bend our elbow, knee, etc. How is this possible?
Answer:
Any kind of movement occurs at Joints. Joint is a place where two bones meet.
Elbow Joint and Knee Joint are hinge joint, where movement occurs in one direction.
Question 5.
Which type of movement would have been possible if
(a) our elbow had a fixed joint?
(b) we were to have a ball and socket joint between our neck and head.
Answer:
(a) no movement
(b) Movement in all directions
Question 6.
Earthworms are known as ‘farmer’s friends’. Why?
Answer:
Earthworm actually eats it’s way through the soil and then throws away the undigested part of the material it eats. This activity of earthworm makes the soil more useful for the plant.
Long Answer Questions
Question 1.(a) Unscramble the jumbled words and write them in the blank spaces provided.
(i) neosb ……………….
(ii) themevom ………………..
(iii) iontcaronct …………………
(iv) lsecsum …………………
(v) arctigeal …………………….
(vi) epahs …………………….
(vii) sangro inerlan …………………….
(viii) laxaaeriont ……………………
Answer:
(i) bones
(ii) movement
(iii) contraction
(iv) muscles
(v) cartilage
(vi) shape
(vii) internal organs
(viii) relaxation
Question 2.
Read the following paragraph and fill in the blanks using the words you unscrambled.
………(a)…….. and ………(b)…….. from the skeleton of the human body. They provide the framework. Give ……………(c)……….. to the body and help in ………….(d)………… They protect the …(e)……. The bones are moved by alternate …….(f)….. and …….(g)…… of two sets of ……(h)……… attached to them.
Answer:
(a) Bones
(b) Muscles
(c) Shape
(d) Movement
(e) Internal Organs
(f) contraction
(g) relaxation
(h) muscles
Bones and Muscles form the skeleton of our body which provides a framework to the body and also protect our internal organs
Question 3.
How is the skeleton of a bird well-suited for flying?
Answer:
Birds can fly because their bodies are well suited for flying. Their bones are hollow and light. The bones of hind limbs are typical for walking and perching. The bony parts of fore limbs are modified as wings. The shoulder bones are strong. The breast bones are modified to hold muscles of flight which is used to move wings up and down.
Question 4.
In Fig. 8.2 there are snakes of the same size slithering on the sand. Can you identify which of them would move faster and why?
Answer:
(A)
The snakes' body gets curved into loops. Each loop gives a forward push, therefore more the loops more will be the forward push