Q&A Bank

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356 answers across all subjects

Subject:Mathematics Science English Social Studies Hindi Physics Chemistry Biology Computer Science

Which of the following is not a correct match? (a) Petiole: attaches leaf to stem (b) Lamina: green flat part of leaf (c) Margin: gives shape to the leaf Veins: transpiration

Solution: (d): Veins: transpiration Veins transport water, minerals and food in the leaf, and provide support to the leaf. In transpiration, water evaporates which is done by stomata of the leaves.

ScienceClass 6CBSE

Which of the following is not the primary function of stem? (a) Conduction of water (b) Photosynthesis (c) Formation of branches Bears flowers and fruits

: Photosynthesis The primary function of leaf is Photosynthesis. Main function of stem: it holds the plant upright, forms branches, bears flowers and fruits, helps in transporting water from roots to the leaves.

ScienceClass 6CBSE

Which of the following is the correct match between the characteristics of stem and the category of plant? (a) Weak stem which cannot stand upright: Creeper (b) Green tender stem: Shrub (c) Thick, hard stem with branching near the base: Tree Thick, hard stem with branches high on the plant: Herb

: Weak stem which cannot stand upright: Creeper Herbs are plants which are the small in size with green and tender stem which cannot stand upright. Shrubs are the medium sized plants having thick, hard stem with branches near the base. Trees are the tall plants having thick, hard stem with branches high on the plant.

ScienceClass 6CBSE

Which of the following combination of features would you observe in grass? (a) Parallel venation and fibrous root (b) Parallel venation and tap root (c) Reticulate venation and fibrous root Reticulate venation and tap root

Solution: : Parallel venation and fibrous root Parallel venation and fibrous roots are usually found in grass, maize, wheat etc. In parallel venation, veins run parallel to one another in the leaf. Fibrous roots are thin fibre like roots which arise in groups from the base of the stem

ScienceClass 6CBSE

How is the skeleton of a bird well-suited for flying?

Following features make the skeleton of a bird well – suited for flying: Bones are hollow and Shape of the body is streamlined which helps to move easily in Bones of hind limbs are specialized for walking, hopping and Bones of forelimbs are modified into wings for Breastbones hold flight muscles and are used to move the wings up and Shoulder bones are

ScienceClass 6CBSE

1. (a) Unscramble the jumbled words and write them in the blank spaces provided. (i) neosb …………………………. (ii) tnemevom ……………………….. (iii) iontcaronct …………………….. (iv) lsecsum …………………………. (v) arctigeal ……………………… (vi) epahs……………………….. (vii) sangro inerlant………………… (viii) laxaeriont ……………………… (b) Read the following paragraph and fill in the blanks using the words you unscrambled. (a) and (b) form 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.

Here are the correct words: (a) Bones movement Contraction Muscles Cartilage Shape Internal organs Relaxation (b) Bones Cartilage shape movement Internal organs Contraction Relaxation Muscles

ScienceClass 6CBSE

Earthworms are known as ‘farmer’s friends’. Why?

Solution: Earthworms are called ‘farmer’s friends’ because they improve the texture and quality of soil. By burrowing into the soil, they make the soil loose, thus allowing air to pass through it and water to drain from it. It gets easier for soil to breathe. Earthworms also increase soil fertility by excreting the undigested materials into the soil.

ScienceClass 6CBSE

Which type of movement would have been possible if (a) our elbow had a fixed joint. we were to have a ball and socket joint between our neck and head.

Solution: If our elbow had a fixed joint there won’t be any Only movements like pointing to something etc could be possible. We would be able to rotate our head in all directions e., in 360°.

ScienceClass 6CBSE

Bones are hard structures and cannot be bent. But, we can still bend our elbow, knee, etc. How is this possible?

Due to the presence of different types of joints between the bones we are able to bend our body parts such as elbow, knee, back etc. Elbow and knee are not made up of a single bone but two or more bones which are joined to each other by hinge joint. This joint along with the muscles help us to bend the elbow and knee.

ScienceClass 6CBSE

Boojho fell off a tree and hurt his ankle. On examination the doctor confirmed that the ankle was fractured. How was it detected?

Solution: Doctor must have detected a swelling in the injured area and taken an X-ray of the ankle. By using X-ray technique, images show the desired part of the bones in our body. By looking at the x-ray, doctor could have confirmed fracture in the ankle.

ScienceClass 6CBSE

Given below is a list of different types of movements in animals. [Running, Jumping, Walking, Slithering, Crawling, Flying, Swimming, Creeping] Write the types of movements seen in each animal. (a) Duck (b) Horse (c) Kangaroo (d) Snail (e) Snake (f) Fish (g) Human beings Cockroach

Solution: Duck – Walking, Flying, Swimming Horse – Running, Walking Kangaroo – Jumping Snail – Creeping, Crawling Snake – Slithering Fish – Swimming Human beings – Walking, Running, Jumping, Swimming, Crawling Cockroach – Walking, Flying, Running

ScienceClass 6CBSE

1. 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. A person lifts weights to build up his biceps.

Hinge joint and ball and socket joint Pivotal joint Hinge joint

ScienceClass 6CBSE

1. Provide one word answers to the statements given below. 1. Joint which allows 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 and 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 joins the head. Part of the skeleton that forms the earlobe.

Solution: Here are the one word answers: Ball and socket joint Bone Upper jaw with skull Muscles Ribs Skeleton Pelvic bones Pivotal joint Cartilage

ScienceClass 6CBSE

1. What would have happened if our backbone was made of one single bone? Solution:

If our backbone was made of one single bone we would not have been able to bend and twist our back.

ScienceClass 6CBSE

Name the type of joint of your hand which helps you to grasp a badminton

Hinge joints present in our fingers help us to grasp the things like badminton racquet. If our backbone was made of one single bone we would not have been able to bend and twist our back.

ScienceClass 6CBSE

How many muscles work together to move a bone? (a) One (b) Two (c) Three Four

: Two

ScienceClass 6CBSE

Snail moves with the help of its (a) shell (b) bone (c) muscular foot whole body.

Solution: (c): muscular foot The muscular foot of the snail comes outside and attaches to the ground during locomotion. The foot of a snail has a special gland that produces slimy mucus to make slippery track to help it move smoothly.

ScienceClass 6CBSE

Match the name of the animals given in Column I with its body parts used for movement given in Column II.A5 Column I Column II (a) Human being (i) Fins (b) Cow (ii) Wings (c) Snake (iii) Legs (d) Eagle (iv) Whole body (e) Fish (v) Limbs

Solution: : swim easily in water Divers while swimming wear fin-like flippers on their feet because the muscle in the feet contracts, generating a curve on one side like a wave and the fin-like flippers move on the opposite direction exerting force against the surrounding water that push the underwater divers forward.

ScienceClass 6CBSE

Which of the following organisms does not have both muscles and skeleton for movement? (a) Dog (b) Snail (c) Earthworm Human being

None. Human beings and dogs have endoskeleton and muscles. Snails have exoskeleton and muscles. Earthworm does not have a skeleton. It has two sets of muscles one that makes it long and thin and the other that makes it fat. The contraction and relaxation of these muscles help in movement.

ScienceClass 6CBSE

Which of the following joints is immovable? (a) Shoulder and arm (b) Knee and joint (c) Upper jaw and skull Lower jaw and upper jaw

Solution: (c): Upper jaw and skull Upper jaw and skull has immovable joints since they are fixed joints.

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