Case Study Questions Class 6 Science Body Movements

Case Study Questions Class 6 Science Chapter 8 Body Movements

CBSE Class 6 Case Study Questions Science Body Movements. Important Case Study Questions for Class 6 Board Exam Students. Here we have arranged some Important Case Base Questions for students who are searching for Paragraph Based Questions Body Movements.

At Case Study Questions there will given a Paragraph. In where some Important Questions will made on that respective Case Based Study. There will various types of marks will given 1 marks, 2 marks, 3 marks, 4 marks.

CBSE Case Study Questions Class 6 Science Body Movements

Case study 1

We are able to bendor rotate our body in places where twoparts of our body seem to be joined together — like elbow, shoulder or neck. These places are called joints. Bones are joined together at these joints. Bones cannot be bent. So, It is not one long Bone from the upper arm to our wrist. It is different bones joined together at the Elbow. Similarly, there are many bones present in each part of the body. We can bend or move our body only at those points where bones meet. There are different types of joints in our body to help us carry out different movements and activities.

We will learn about ball and socket movement with the help of an activity. Roll a strip of paper into a cylinder. Make a small hole in an old rubber or plastic ball and stick the cylinderon the ball. Put the ball in a small bowl. Now, imagine that the paper cylinder is your arm and the ball is its end. TheBowl is like the part of the shoulder towhich your arm is joined. The roundedEnd of one bone fits into the cavity (hollow space) of the other bone. Such a joint allows movementsIn all directions.

The joint where our neck joins the head is a pivotal joint. It allows us to bend our head forward and backward and turn the head to our right or left.

Hinges allow only back and forth movement. The elbow has a hinge Joint that allows only a back and forth Movement.

Que. 1) Which joint allows movements in all directions?

(a) Ball and socket

(b) Pivotal joint

(c) Hinge Joint

(d) Both (a) and (c)

Que. 2) The Elbowhas a..…………………………………………………………………… that allows only back and forth Movement.

(a) Pivotal joint

(b) Hinge Joint

(c) Ball and socket

(d) None of the above

Que. 3) The places where bones are joined together are called joints?

(a) True

(b) False

Que. 4) Explain how are we able to bend our Elbow?

Que. 5) What is the function of the Pivotal joint?

Answer Key

Que.1. a) Ball and socket joint

Que. 2. b) Hinge Joint

Que. 3. a) True

Que. 4) Answer: As we know that bones cannot be bend but Elbow is not one long Bone from the upper arm to our wrist. It is different bones joined together at the Elbow. We can bend or move our body only at those points where bones meet.

Que. 5) Answer: The joint where our neck joins the head is a pivotal joint. It allows us to bend our head forward and backward and turn the head to our right or left.

Case study 2

We cannot move some joints between bones in our head. Such joints are called fixed joints. There is a joint between the upper jaw and the rest of the headwhich is a fixed joint. All the bones in our body form aframework to give a shape to our body. This framework is called the skeleton. We can have some idea about the shape and number of bones in some parts of our body by feeling them. One way we could know this shape better would be to look at X-Ray images of the human body. Sometimes when we are hurt, or have an accident, doctors use these X-ray images to find out about any possible injuries that might have happened to the bones. The X-Rays show the shapes of the bones in our bodies. Our wrist is flexible becauseit is made up ofseveral small bones called carples.

Take a deep breath and hold it for a little while. Feel your chest bones and the Back bone by gently pressing the middle of the chest and back at the same time.We see that the ribs are curiously bent. They join the chest bone and the backbone together to form a Box. This is called the rib cage. There are 12 ribs on each side of chest. Some important internal parts of our body lie protected inside this cage. Backboneis made up of many small bones called vertebrae. The backbone consists of 33 Vertebrae. The rib cage is joined to these bones.

Que.1) Human wrist is made up of small bones called ………………………………………………………………………………….……..

a) Vertebrae

b) Rib bones

c) Carples

d) None of the above

Que.2) Our backbone consists of ………………………………………………………………………………. vertebrae.

a) 24

b) 12

c) 38

d) 33

Que.3) Through X-ray images we can see the shape of the bones?

a) True

b) False

Que.4) What is a Rib cage? Mention its function?

Que.5) Define the term skeleton?

Answer Key

Que.1. c) Carples

Que.2. d) 33

Que.3. a) True

Que.4) Answer: We see that the ribs are curiously bent. They join the chest bone and the backbone together to form a Box. This is called the rib cage. There are 12 ribs on each side of chest. Some important internal parts of our body lie protected inside this cage.

Que.5) Answer: All the bones in our body form a framework to give a shape to our body. This framework is called the skeleton.

Case study 3

Two bones on the back are prominent where the shoulders are. They are calledShoulder bones.Observe Fig. 1 carefully. This structure is made of pelvic bones. They enclose the portion of your body below the stomach. This is the part you sit on. The skull is made up of many bones joined together. It encloses and protects a very important part of the body, the brain. There are some additional parts of the skeleton that are not as hard as the bones and which can be bent. These are called cartilage.You do feel something in the upper parts of the ear that is not as soft as the ear lobe but, not as hard as a bone, This is cartilage. Cartilage is also found in the joints of the body.

The bones move the way they do because of the presence of muscles. The muscle Bulged due to contraction (it became Smaller in length).When contracted, the muscle becomes shorter, stiffer and thicker. ItPulls the bone.Muscles work in pairs. When one of them contracts, the bone is pulled in that direction. The other muscle of the pair relaxes. To move the bone in the opposite direction, the relaxed muscle contracts to pull the bone towards its original position, while the first relaxes.A muscle can only pull. It cannot push.Thus, two muscles have to work together to move a bone.


Fig. 1

Que.1) The skull encloses and protects the ………………………………………………………………………………………….

a) Cartilage

b)Bones

c) Brain

d) Hair

Que.2) The portion of our body, we sit on …………………………………………………………………………………………..

a) Shoulder bones

b) Pelvic bones

c) Backbone

d) None of the above

Que.3) Two Prominent bones near the shoulder are called Shoulder bones.

a) True

b) False

Que.4) What is cartilage. Mention body parts where it is found?

Que.5) Explain how we are able to make bones move in ways we want to?

Answer Key

Que.1. c) Brain

Que.2. b) Pelvic bones

Que.3. a) True

Que.4) Answer: There are some additional parts of the skeleton that are not as hard as the bones and which can be bent. These are called cartilage. It is found in the upper parts of the ear and also in the joints of the body.

Que.5) Answer: The bones move the way they do because of the presence of muscles. When contracted, the muscle becomes shorter, stiffer and thicker. It Pulls the bone. Muscles work in pairs. When one of them contracts, the bone is pulled in that direction. The other muscle of the pair relaxes. To move the bone in the opposite direction, the relaxed muscle contracts to pull the bone towards its original position, while the first relaxes. A muscle can only pull. It cannot push. Thus, two muscles have to work together to move a bone.

Case study 4

The body of an earthworm is made up of many rings joined end to end. An earthworm does not have bones. It has muscles which help to extend and shorten the body. During movement, the earthworm first extends the front part of the body, keeping the rear portion fixed to the ground. Then it fixes the front end and releases the rear end. It then shortens the body and pulls the rear end forward. This makes it move forward by a small distance. Repeating such muscle expansions and contractions, the earthworm can movethrough soil. Its body secretes a slimysubstance to help the movement.

Under its body, it has a large number of tiny bristles (hair like structures) projecting out. The bristles are connected with muscles. The bristles help to get a good grip on the ground. The earthworm, actually, eats its way through the soil! Its body then throws away the undigested part of the material that it eats. This activity of an earthworm makes the soil more useful for plants.The rounded structure snails carry on theirback is called the shell.  It is the outer skeleton of the snail, but is not made of bones. The shell is a single unit and does not help in moving from place to place. It has to be dragged along. A thick structure and the head of the snail may come out of an opening in the shell. The thick structure is its foot, made of strong muscles.

Que.1) Earthworm has bones which helps to extend and shorten its body?

a) True

b) False

Que.2) ……………………………………………………………………………….….. is the outer skeleton of the snail.

a) Bristles

b)Foot

c) Shell

d) Rings

Que.3) The ……………………………………………………………………………….… in earthworms help them to get a good grip on the ground.

a) Rings

b) Skin

c) Shell

d) Bristles

Que.4) Explain the gait of earthworms?

Que.5) What helps earthworms to fix its body to the ground?

Answer Key

Que.1. b) False

Que.2. c) Shell

Que.3. d) Bristles

Que.4) Answer: The body of an earthworm is made up of many rings joined end to end. An earthworm does not have bones. It has muscles which help to extend and shorten the body. During movement, the earthworm first extends the front part of the body, keeping the rear portion fixed to the ground. Then it fixes the front end and releases the rear end. It then shortens the body and pulls the rear end forward. This makes it move forward by a small distance.

Que.5) Answer: Under its body, earthworm has a large number of tiny bristles (hair like structures) projecting out. The bristles are connected with muscles. The bristles help to get a good grip on the ground.

Case study 5

Cockroaches walk and climb as well As fly in the air. They have three pairs of legs. These help in walking. The body is covered with a hard outer skeleton. This outer skeleton is made of number of plates joined together and that permits movement. There are two pairs of wings attached to the body behind head. The cockroaches have distinct muscles — those near the legs move the legs for walking. The body muscles move the wings when the cockroach flies.

Birds fly in the air and walk on the ground. Some birds like ducks and swans also swim in water. The birds can fly because their bodies are well suited for flying. Their bones are hollow and light. The bones of the hind limbs are typical for walking and perching. The bony parts of the forelimbs are modified as wings. The shoulder bones are strong. The breastbones are modified to hold muscles of flight which are used to move the wings up and down.

Que.1) A Cockroach has ………………………………………………………………….…. Pairs of legs.

a) Two

b)Three

c) Four

d) Six

Que.2) Which of the following bird can also swim in water?

a) Eagle

b) Swan

c) Duck

d)Both (b) and (c)

Que.3) In birds, the hind limbs are modified as wings.

a) True

b) False

Que.4) Describe the structure of birds that help them to fly?

Que.5) Briefly explain the presence of distinct muscles in cockroaches?

Answer Key

Que.1. b) Three

Que.2. d) Both (b) and (c)

Que.3. b) False

Que.4) Answer: The birds can fly because their bodies are well suited for flying. Their bones are hollow and light. The bony parts of the forelimbs are modified as wings. The shoulder bones are strong. The breastbones are modified to hold muscles of flight which are used to move the wings up and down.

Que.5) Answer: The cockroaches have distinct muscles — those near the legs move the legs for walking. The body muscles move the wings when the cockroach flies.

Case study 6

The head and tail of the fish are smaller than the middle portion of the body – the body tapers at both ends. This body shape is called streamlined.The shape is such that water can flow around it easily and allow the fish to move in water. The skeleton of the fish is covered with strong muscles. DuringSwimming, muscles make the front part of the body curve to one side and the tail part swings towards the oppositeside. The fish forms a curve. Then, quickly, the body and tail curve to the other side. This makes a jerk and pushes the body forward. A series of such jerks make the fish swim ahead. This is helped by the fins of the tail.Fish also have other fins on their body which mainly help to keep the balance of the body and to keep direction, while swimming.

Snakes have a long backbone. They have many thin muscles. They are connected to each other even though they are far from one another. Muscles also interconnect the backbone, ribs and skin. The snake’s body curves into many loops. Each loop of the snake gives it a forward push by pressing against the ground. Since its long body makes many loops and each loop gives it this push, the snake moves forward very fast and not in a straight-line.

Que.1) Fish have ……………………………………………………………………..… that helps them to keep a body balancein water.

a) Gills

b) Skeleton

c) Fins

d) None of the above

Que.2) Snakes have a long …………………………………………………………………………………………….

a) Muscle

b)Ribs

c)Shape

d) Backbone

Que.3) A snake’s body curves intofour loops.

a) True

b) False

Que.4) Define Streamlinedshape of body in fish?

Que.5) What makes a snake move forward very fast pressing against the ground?

Answer Key

Que.1. c) Fins

Que.2. d) Backbone

Que.3. b) False

Que.4) Answer: The head and tail of the fish are smaller than the middle portion of the body – the body tapers at both ends. This body shape is called streamlined. The shape is such that water can flow around it easily and allow the fish to move in water.

Que.5) Answer: Snakes have a long backbone. They have many thin muscles. They are connected to each other even though they are far from one another. Muscles also interconnect the backbone, ribs and skin. The snake’s body curves into many loops. Each loop of the snake gives it a forward push by pressing against the ground. Since its long body makes many loops and each loop gives it this push, the snake moves forward very fast and not in a straight-line.

Updated: March 15, 2022 — 4:59 pm

4 Comments

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  1. jk its so helpful

  2. Thanks in year 2023 these questions are coming??

    1. Hmmm ayega NEP chalu hogya na, CBSE now focus will critical based Questions

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