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4th Science Term 1 Unit 1 My body Book Back Answers
4th Science Guide Term 1 Chapter 1 My body
I. Pick out the odd one :
Question 1.
1. Heart
2. Legs
3. Brain
4. Kidney
Answer:2. Legs
Question 2.
1. Eyes
2. Ears
3. Fingers
4. Lungs
Answer:4. Lungs
Question 3.
1. Fore brain
2. Mid brain
3. Hind brain
4. Nerves
Answer:4. Nerves
II. Complete the figure with words given in the bracket :
(Kissing on the mouth, Grand parents’ love, Hitting the
buttocks, Pat of dad on head, Parent’s hug and kisses, Showing awkward
pictures)
III. Find the answers from the following clues and circle the words (First one is done for you)
Question 1.
1. An internal organ.
2. Organ that helps us to breath.
3. An organ removing wastes from our body,
4. Unfair and unhealthy touch.
5. Everyday we should drink more ___________ .
Answer:
1.
Heart
2.
Lungs
3.
Kidney
4.
Bad Touch
5.
Water
IV. Say true or false :
Question 1.
Head, hand and legs are internal organs.Answer:False
Question 2.
Heart is made up of muscles.Answer:True
Question 3.
Muscles are the soft parts that cover our bones.Answer:True
Question 4.
Brush your teeth once a day.Answer:False
Father patting you on your head is a good touch.Answer:True
V. Choose the correct answer :
Question 1.
____________ is the commanding centre of our body.
(a) Heart
(b) Lungs
(c) Kidney
(d) Brain
Answer:(d) Brain
Question 2.
Food is converted to energy in the _____________.
(a) Neck
(b) Heart
(c) Stomach
(d) Nose
Answer:(c) Stomach
Question 3.
Every day we should brush our teeth __________ times.
(a) One
(b) Two
(c) Three
(d) Four
Answer:(b) Two
Question 4.
Good touch is a fair and ___________ touch.
(a) Unhealthy
(b) Bad
(c) Unsafe
(d) Healthy
Answer:(d) Healthy
Question 5.
Drink a lot of every day.
(a) Oil
(b) Water
(c) Packed juice
(d) Salt water
Answer:(b) Water
VI. Answer the following questions in one or two sentences :
Question 1.
Name the internal organs.
Answer:
Some body parts such as stomach, lungs and heart that are inside our body, these parts are called internal organs.
Question 2.
What are the functions of brain?
Answer:
Brain is the commanding centre of our body.
·
It controls all activities of our body like
moving our hands and legs sitting or walking.
·
It helps us to think and perform various
actions.
Question 3.
List out the food items for healthy mouth and teeth.
Answer:
·
Drink water or milk instead of sugar juices.
·
Take plenty of fruits, vegetables and dairy
products.
·
Eat candy, cake and ice cream as less as
possible.
Question 4.
How will you take care of your heart and kidney?
Answer:
·
For healthy Heart – Stay away from processed
food. Choose fresh fruit and vegetable.
·
For healthy Kidney – Drink plenty of fluid
(water & Juice).
Question 5.
What do you do when some one touches you and you feel uncomfortable?
Answer:
·
Say “Don’t touch” in a loud voice.
·
Leave the spot quickly.
·
Tell elders like your parents or teachers till
you get help.
VII. Think and answer :
Question 1.
When an unknown person disturbs you, how do you behave? Write in your own
words.
·
I must never be afraid, to shout and say, Don’t
touch me”.
·
Must leave the spot quickly.
·
Must tell elders like father or mother or
teacher to get help.
Question 2.
Which organ controls thinking, speaking and learning. Write its three
important parts.
Answer:
·
The organ that controls thinking,speaking and
learning is ‘Brain’.
·
The three important parts of Brain are
1.
Fore brain
2.
Mid brain
3.
Hind brain
Samacheer Kalvi 4th Science Guide Term 1 Chapter 1 My body
Question 1.
There are some body parts hidden in the table below. Can you spot them?
1.
Hear
2.
Nose
3.
Ears
4.
Leg
5.
Hand
Try to Answer (Text Book Page No. 83)
Question 1.
______ (Nose / Brain) is an internal organ.Answer:Rain
Question 2.
We can see the internal body parts (True / False).Answer:False
Try to Answer (Text Book Page No. 86)
Question 1.
Is it Good touch or Bad touch? Why?
Answer:
(A) Bad touch – It is the kind you don’t like and want it to
stop.
(B) Good touch – It is a way for people to show they care
and help for each other.
Try to Answer (Text Book Page No. 92)
Look at the picture and write ‘Good touch’ or ‘Bad touch’.
Samacheer Kalvi 4th Science Guide My body Additional Questions and Answers
Question 1.
fore brain, mid brain, hind brain, centre brain
Answer:Center
brain
Question 2.
spongy, J-shaped, contract, expand
Answer:J-shaped
Question 3.
bean shaped, purify blood, filtering, breath in
Answer:Bean shaped
Write True or False :
Question 1.
Brain is protected by skull.
Answer:True
Question 2.
We have three kidneys.
Answer:False
Question 3.
Lungs help us to breath.
Answer:True
Question 4.
When we breath in, the lungs become bigger.
Answer:True
Question 5.
We breath out, we give out oxygen from the lungs.
Answer:False
Question 6.
Lungs pumps blood to all parts of the body.
Answer:False
Fill the blanks :
Question 1.
When we breath out, we give out __________ from the lungs.
(a) Carbon dioxide
(b) Oxygen
(c) Nitrogen
(d) Hydrogen
Answer:(a) Carbon
dioxide
Question 2.
The heart beat about __________ in a minute.
a) 71 times
b) 72 times
c) 62 times
d) 60 times
Answer:(b) 72 times
Question 3.
How many kidneys does the human body have?
(a) 2
(b) 1
(c) 3
(d) 4
Answer:(a) 2
Question 4.
How many bones are there in an adult human being?
(a) 210
(b) 260
(c) 206
(d) 201
Answer:(c) 206
Question 5.
The main function of the kidney is
(a) To control blood pressure
(b) To control body temperature
(c) To remove waste product from the body
(d) To help in digestion of food.
Answer:(c) To remove
waste product from the body
Question 6.
How many bone are there is a newly born infant
(a) 206
(b) 230
(c) 280
(d) 300
Answer:(d) 300
Question 7.
Which is the largest organ in the human body?
(a) Liver
(b) Heart
(c) Skin
(d) Kidney
Answer:(c) Skin
V. Fill in the blanks.
Question 1.
Stomach is a __________ bag found below the lungs.Answer:J-shaped
Question 2.
Heart is made up of _________.Answer:Muscles
Question 3.
Stomach contains special juice to breakdown ___________ into
energy.Answer:Food
Question 4.
The kidneys purify __________.Answer:Blood
VI. Answer the following questions in one r two sentences :
Question 1.
Draw a human heart and colour the picture.
Answer:
Question 2.
What happens to the lungs when we breathe in?
Answer:
–
When we breath in, we take in oxygen from air
through the nose and pass it to the lungs.
–
The lungs expands (becomes big) in the position.
Question 3.
What is milk teeth?
Answer:
–
The first set of teeth starts to develop from
the age of six months.
–
They are called milk teeth and they are 20 in
number.
Question 4.
Name the four types of the permanent teeth.
Answer:
There are four types of teeth: Incisors, Canines, Premolars
and Molars.
Question 5.
How do you take care of your mouth and teeth?
Answer:
–
Change toothbrush once in every three months.
–
Avoid sticky food.
–
Brush twice a day. (After getting up and before
going to bed)
–
Rinse your mouth with water every time after you
eat.
Question 6.
List out the activities related to bad touch.
Answer:
·
Touching the buttocks and other private parts.
·
Hitting, slapping, spitting, pushing or
punching, kissing.
·
Activities that make you feel scared or nervous
or ashamed.
·
Dirty talk and dirty pictures.
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