Download CLASS 5 - Mother-Teresa

CLASS 5 - SCIENCE
CHAPTER-1
The Skeletal System
A. Tick () the right choice:
1. The ribs protect the
Ans: Heart
2. The pivot joint allows the movement of :
Ans: Head
3. Total number of bones present in the human body is :
Ans: 206
4. The longest bone present in human body is :
Ans: Femur
5. An example of irregular bone is :
Ans: Spine
B. Fill in the blanks:
1. The hardest substance present in our body is _______.
Ans: Enamel
2. The bones of _______ jaw are movable.
Ans: Lower
3. There are ______ pairs of floating ribs.
Ans: Two
4. Red blood cells are produced in the _______.
Ans: Bone marrow
5. Shoulder girdle is made up of ______ bones fused to form a single bone.
Ans: Three
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C. Write True or False:
1. Human beings have eight limbs. False.
2. The skull protects the brain. True
3. The knee joint is an example of pivot joint. False
4. Three bones fuse together to form a shoulder girdle. True
5. Gliding joint is the freely movable joint. False
D. Match the following :
1. Hinge joint
Ankle joint
2. Gliding joint
Joint between the bones of vertebral column
3. Pivot joint
Joint between the first and second vertebrae
4. Ball and socket joint
Shoulder joint
E. Name the following:
1. Freely movable joint.
Ball and socket joint
2. Smallest bone in our body.
Stirrup
3. Least movable joint.
Gliding joint
4. Muscles present in stomach.
Smooth
5. Irregular bone forming the main axis of body.
Backbone
F. Answer the following questions:
1. What are vertebra?
Ans: The small bones that form the vertebral column are called vertebra.
2. Give the functions of skeletal system.
Ans: The functions of skeletal system are:
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a)
b)
c)
d)
e)
It provides the structural support to the entire body.
It protects the delicate internal organs like heart and brain.
It helps in the movement of different parts of our body.
The bones of the skeleton store minerals like calcium and phosphorus.
Bone marrow helps in production of red blood cells.
3. Which ribs are known as floating ribs?
Ans: The last two pairs of ribs that are not attached to the sternum are known as floating ribs.
4. Differentiate between movable and immovable joints.
MOVABLE JOINT
IMMOVABLE JOINT
Synovial cavity is present in movable joint.
Synovial cavity is absent in immovable
joint.
Movement can occur in these joints.
No movement can occur in these joints.
It includes all joints except the bones of
skull.
It includes the bones of skull.
5. Give the functions of cartilage.
Ans: Cartilage protects the bones from wear and tear which occurs due to constant movements which
take place at the joint.
G. Can you explain, why?
1. Our backbone is composed of 33 small irregular bones. What would happen if instead of these
only one straight bone is present?
Ans: We would not be able to bend our body.
2. Sanjam’s friend is suffering from rickets. Doctor advised him to increase his intake of milk. Why?
Ans:
Milk contains calcium which makes bones strong.
H. Enchance your skills.
Label the diagram of human skeletal system using clues given.
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ACTIVITY:
Make diagram of Shoulder girdle and Hip girdle
Ans : Refer Page no. 9
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CHAPTER-2
The Circulatory System
B. Tick () the right choice:
1. Name the organ that oxygenate and makes the blood pure.
Ans:
Lungs
2. The average pulse rate of human body is
Ans:
72 per min
3. The human heart is
Ans:
Four chambered
4. Which of these have thick muscular walls?
Ans:
Arteries
5. The thinnest blood vessels
Ans:
Capillaries
C. Fill in the blanks:
1. __________ are deep seated.
Ans:
Arteries
2. Red blood cells are also known as ___________.
Ans:
Erythrocytes
3. Arteries mostly carry ____________ blood.
Ans:
Oxygenated
4. Oxygenated blood is poured into ____________.
Ans:
Left auricle
5. Blood passes ___________ through the heart during circulation.
Ans:
Twice
D. Write True or False:
1. The broad portion of heart is downward and apex is upward. (False)
2. Red blood cells are also called erythrocytes. (True)
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3. Sparrows have the highest pulse rate. (False)
4. Blood helps in removal of waste materials from the body. (True)
5. Veins are superficial. (True)
E. Match the following:
1. Red blood cells
:
Erythrocytes
2. Veins
:
Deoxygenated blood
3. Heart
:
Four chambered
4. Artery
:
Oxygenated blood
5. Pulse rate
:
Heartbeat
F. Give one word for the following:
1. The part of the heart that receives pure blood – Left auricle.
2. Blood vessels present at the junction of an artery and vein – Capillaries.
3. Chambers present in human heart – Four.
4. Red blood cells are also known as – Erythrocytes.
5. The part of the heart that receives impure blood – Right auricle.
G. Answer the following questions:
1. Give three functions of blood.
Ans. i. Blood helps in transporting digested food from the alimentary canal to all parts of the
body.
ii. It helps in transportation of oxygen for respiration.
iii. It takes carbon dioxide formed during respiration to lungs for exhalation.
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2. Define circulatory system.
Ans. The system which helps in transporting nutrients and other substances from one part of
the body to the other parts of the body is known as circulatory system.
3. What is blood?
Ans. The red coloured liquid which transports nutrients and other substances to all parts of the
body is known as blood.
4. Why arteries have thick walls?
Ans. The arteries have to distribute blood to all parts of body hence they have thick walls.
5. What is double circulation?
Ans. The blood has to pass twice through the heart so as to circulate once through the body.
This circulation is known as double circulation.
H. Can you explain, why?
1. Blood is the river of life.
Ans : Blood is liquid and just like river this liquid flows throughout our body. For humans, without
blood, there will be no life because there will be nothing to transport nutrients and oxygen to
the body cells. Hence, blood is the river of life.
2. Walls of capillaries are very thin.
Ans : Capillaries have thin walls so that oxygen, carbon dioxide, nutrients and waste can flow
through the walls without difficulty.
I. Enhance your skills:
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Label 1,2,3,4 from the options given below:
J. Activity
Make labelled diagram of structure of heart
Ans : Refer page 22
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CHAPTER -3
THE NERVOUS SYSTEM AND SENSE ORGANS
EXERCISE
A. TICK (√) THE RIGHT CHOICE:
1. _________maintains the posture of body.
Ans. Cerebellum
2. __________helps to sense variety of tastes.
Ans. Tongue
3. Reflex actions are generated by the:
Ans. Spinal cord
4. Nerves that carry messages to the brain as well as bring back signals from the brain are called:
Ans. Mixed nerves
5. The ________ is the largest sense organ of our body.
Ans. Skin
B. Fill in the blanks:
1. Reflex actions are the ___________ reaction of body to change in surrounding.
Ans. Sudden
2. The __________forms covering over the complete body.
Ans. Skin
3. The _________nerves carry messages from the body to brain/spinal cord.
Ans. Sensory
4. The brain contains about _________ % fat.
Ans. 85
5. The _________controls involuntary muscle movements.
Ans. Brain stem
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C. Write True or False
1. We have six sense organs.
(False)
2. Brain is the boss of our body. (True)
3. Cerebellum controls the working of sense organs of our body. (False)
4. Spinal cord is the most important structure between the brain and body. (True)
5. Taste is identified by nose. (False)
D. Match the following:
1. Mixed nerves
carry message to and from brain
2. Brain stem
simplest part of human brain
3. Spinal cord
carry message from various parts of the body to brain/spinal cord
4. Spinal nerves
consists of bundle of nerves
E. Name the following:
1. The simplest part of brain
-
Brain stem
2. The largest part of brain
-
Cerebrum
3. The most important organ of nervous system
-
Brain
4. It is responsible for thinking
-
Cerebrum
5. It is responsible for maintaining posture of body
-
Cerebellum
F. Answer the following questions:
1. Define the nervous system. Name the various parts of nervous system.
Ans. The system that controls all other systems of our body is known as Nervous System. Brain, Spinal
Cord and Nerves (along with the five sense organs) are the various parts of nervous system.
2. Name the various parts of brain. Give one function of each.
Ans. The human brain has three parts:
a. Cerebrum
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b. Cerebellum
c. Brain stem
Functions: Cerebrum controls the working of sense organs of our body.
Cerebellum maintains the balance and posture of our body.
Brain stem controls involuntary muscle movements.
3. What are reflex actions? Give examples.
Ans. A reflex action is a rapid and automatic response generated by our body to a sudden change in
the surrounding.
Example- secretion of saliva, blinking of eyes etc.
4. Name the three types of nerves. Give function of each.
Ans. The three types of nerves are sensory nerves, motor nerves and mixed nerves.
Sensory nerves carry messages from various parts of the body to brain or spinal cord.
Motor nerves carry messages away from the brain or spinal cord to the muscles where the action
has to be taken.
Mixed nerves carry out both the functions, they carry messages from the brain and bring them
back to the brain.
5. Name the five sense organs. Give function of each.
Ans.
1. Eyes
-
Sight
2. Ears
-
Hearing
3. Nose
-
Smell
4. Tongue
-
Taste
5. Skin
-
Touch
G. Can you explain, why?
1. Sanjam immediately takes his hands away on touching a hot pan. Why/
Ans: It is actually a reflex action which is a rapid and automatic response generated by the body to a
sudden change in the surrounding.
2. Why is a drunkard unable to maintain the balance of his body?
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Ans: Alcohol affects cerebellum which is the center of movement, posture and balance of the body.
This is the reason that drunkard is unable to maintain the balance of his body.
Activity: Draw and label different parts of brain. (Page 44)
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CHAPTER 4
SAFETY AND FIRST AID
Exercise
A. Tick(√) the right choice:
1. People walking on the road are known as:
Pedestrians
2. The tight bandage tied above the bitten area to stop blood is:
Tourniquet
3. Rabies is a deadly disease caused by:
Dog bite
4. An injection given within 24 hrs of injury:
Anti-Tetanus injection
B. Fill in the blanks with the correct option as given in bracket:
1. An___________ is a harmful incident that causes injury.
Accident
2. Vomiting should be induced in case of___________.
Poisoning
3. An _____________ cream should be applied to kill germs.
Antiseptic
4. The immediate help given to the victim is called______________.
First Aid
C. Write True or False
1. Pedestrians should always walk on the footpath.
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True
2. Water should be used to put out fire in an electric spark.
False
3. Petrol pump is a Smoking Zone Area.
False
Blisters formed due to burning should be pricked.
False
D. Match the following:
1. Dettol
Antiseptic
2. Sling
Fracture
3. Sprain
Tissue breakage
4. Poisoning
Vomiting
5. Electric spark
Sand
E. Give one word for the following:
1. A crack in the bone. -
Fracture
2. Immediate help given in an accident.
-
First aid
3. The colour of traffic light that says get ready.
4. A cream that kills germs.
-
-
Yellow
Antiseptic
F. Answer the following questions:
1. How will you put out fire caused by electric spark?
Ans. Electric fire should be put off with the help of sand.
2. What first aid should be given in case of a snake bite?
Ans. For this a tight bandage is tied a little above the bitten area to stop the blood from
circulating in that area and spread of poison can be prevented.
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3. What should be done if a person swallows a poison?
Ans. We should try to induce vomiting by making the victim drink lot of lukewarm, salty water.
4. Give three rules to be followed while crossing a road.
Ans. 1. We should always use a footpath to walk on the road.
2. We should always use zebra crossing while crossing the road.
3. We should not let children run or play on the road.
G. Can you explain, why?
1. Traffic police generally wears bright colour uniforms with orange stripes that reflect light.
Why?
Ans. This High visibility safety apparel is worn by Traffic police to alert drivers and other vehicle
operators of a worker’s presence, especially in low light and dark condition.
2. A tight bandage should be tied above the snake bite area. Why?
Ans. It is done to stop the blood from circulating in that area so that spread of poison can be
prevented.
Activity : Draw ten traffic sign boards and explain their meaning (Page 38)
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CHAPTER-5
GROWTH AND REPRODUCTION IN PLANTS
Exercise
A. Tick (√) the right choice:
1. Wheat is an example of
crop.
(a) Summer
(b) Winter √
2. The practice of growing crops on a large scale is called:
(a) Agriculture √
(b) Dispersal
3. Reproduction through spores occurs in:
(a) Pea
(b) Moulds √
4. Coconut floats in water with the help of:
a) Fibrous outer covering √
b) Spongy part
5). A seed with two cotyledons is called
seed.
a) Monocot
b) Dicot √
B. Fill in the blanks with the correct options as given in bracket:
1. Air, water and warmth are needed for germination. (Germination / fruit formation)
2. Pea is dispersed by explosion. (Explosion /water)
3. Seed coat has a tiny hole through which the seed gets water. (Hole / solid substance)
4. Radicle is another name for root (root/shoot) emerging from a seed.
5. Sycamore (sycamore/coconut) seeds have wing like structure and are dispersed by wind.
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C. Write True or False:
1. All plants produce seeds. (False)
2. Outer covering of the seed is called cotyledon. (False)
3. Dandelion seeds have tufts of hair which act like a parachute. (True)
4. Roses reproduce through spores. (False)
5. Pea is dispersed by water. (False)
D. Match the following:
1. Seed
has a baby plant
2. Rice plant
Kharif crop
3. Cotyledons inside
stores food for baby
4. Potato
reproduces through underground stem
5. Bryophyllum
reproduces through leaves
E. Give one word for the following:
1. Plants grown in the fields
Crops
2. Small shoots emerging from a seed
Seedling
3. Pieces of stem which grow into new plants
Stem cuttings
4. Growth of a baby plant from a seed
Germination
5. Crops which are grown from June to October
Kharif crops
F. Answer the following questions:
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1. What is dispersal of seeds? Name a few agents which help in dispersal of seeds.
Ans: The process by which seeds are scattered away from the parent plant is called Dispersal of seeds.
Dispersal of seeds is carried out by wind, water, and explosion or even by animals.
2. Write down the stages involved in agriculture.
Ans: The different stages involved in agriculture are - ploughing, adding fertilizers, sowing, irrigation,
protection of crops and harvesting.
3. Define Rabi and Kharif crops with examples.
Ans: Rabi crops - The crops grown from November to April are called Rabi crops. Example-wheat, pea,
mustard.
Kharif Crops -The crops grown from June to October are called Kharif crops. Example-rice, jowar,
bajra, jute
4. What is germination? What are the conditions required for germination?
Ans: The process by which seed changes into a baby plant (called seedling) is called germination.
Conditions required for germination are air, water and warmth.
5. Plants grow from parts other than seeds. Name the plant parts and give example.
Ans:
Plant part
Examples
1. Stem cuttings
Rose, Hibiscus, Money Plant
2. Root
Dahlia, Carrot
3. Leaves
Bryophyllum, Begonia
4. Underground Stem Onion, Ginger
5. Spores
Mushroom, Moulds
G. Can you explain, why?
1. All seeds cannot be dispersed by wind. Why?
Ans: Plants having light weight seeds or hairy or winged seeds can only be dispersed by air.
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2. Mansi wishes to grow rose in her garden. What advice would you offer her?
Ans: Rose can be grown from the stem cuttings.
Activity: Draw labeled diagrams of Stages of germination (page 7)
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CHAPTER 6
VEGETATIVE PROPAGATION
Exercise
A. Tick (√) the right choice:
1. Stigma, style and ovary are the parts of:
Carpel
2. The part of the flower that attract insects for pollinations:
Petal
3. Pollen grains are present in:
Anther
4. The stalk on which the flower stands:
Pedicel
B. Fill in the correct option as given in bracket.
1. Potato, an underground stem has ____________ which give rise to a new plant.
Buds
2. The ___________ of sugarcane can grow into a new plant.
Stem
3. Money plant and Jasmine grow by______________.
Stem cutting
4. Carrot and sweet potato can grow into new plants from their ____________.
Roots
C. Write true or false:
1. Sepals are brightly coloured to attract insects.
False
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2. Male part of the flower is carpel.
False
3. Incomplete flower looks like a seed.
False
4. Anther is a bilobed structure.
True
D. Match the following:
1. Ovary
develops to form fruit
2. Spices
dried flower buds
3. Ovules
changes into seeds
4. Nectar
sweet, sticky substance
E. Give one word for the following:
1. Outermost whorl of a flower
-
Sepal
2. Colourful whorl of a flower
-
Petal
3. Stalk on which four whorls rest
-
Pedicel
4. Female part of a flower
-
Carpel
F. Answer the following questions:
1. What is vegetative propagation?
Ans. It is a process in which new plants grow from stem, leaves and roots instead of seeds or
spores.
2. Plants like fungi and ferns do not bear flowers. Then how do they reproduce?
Ans. They reproduce through spores.
3. Differentiate between complete and incomplete flower.
Ans. A flower in which all the four whorls i.e., sepal, petal, stamen and carpel are present is known
as complete flower. Ex- China rose, Mustard
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A flower in which one or more whorls is missing is called an incomplete flower. Ex- Date palm,
mulberry tree.
4. Define Pollination.
Ans. The transfer of pollen grains from anther to stigma is known as pollination.
G. Can you explain, why?
1. Most of the flowers are bright and showy. Why?
Ans. Most of the flowers are bright and showy to attract the insects so that pollination can occur.
2. Banana has no seeds, then how does it reproduce?
Ans. Banana plant is gigantic herb that grows from an underground stem (rhizome), and forms a
false trunk with leaves. There emerges a large flower spike, with numerous individual flowers,
that bends downwards to become fruits. After the plants had fruits, they die and are replaced by
others that arise from the underground stem and that process can keep on going for many years.
H. Enhance your skills.
Label the diagram showing parts of a flower:
Activity : Grow a rose plant by stem cutting.
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