Samacheer Kalvi 7th Science Term 1 Solutions Chapter 6 Pdf
Tamilnadu Board Samacheer Kalvi 7th Science Term 1 Solutions Chapter 6: Tamilnadu State Board Solution Class 7 Science Term 1 Chapter 6 – Health and Hygiene.
Samacheer Kalvi 7th Science Term 1 Solutions Chapter 6: Overview
|
Board |
Samacheer Kalvi |
| Class |
7 |
|
Subject |
Science |
| Chapter |
6 |
|
Chapter Name |
Health and Hygiene |
Samacheer Kalvi 7th Science Term 1 Solutions Chapter 6 Pdf
Health and Hygiene
Chapter 6
I.) Choose the appropriate answer.
1.) Ravi has sound mind and physically fit body. It refers to
a.) hygiene
b.) health
c.) cleanliness
d.) wealth
Anwer: b.) health
Solution : Health mean having sound mind and physically fit body
2.) Sleep is not only good for our body, but it is also good for
a.) enjoyment
b.) relaxation
c.) mind
d.) environment
Answer: c.) mind
Solution: Sleep is not only good for our body, but it is also good for mind
3.) Our living place should be
a.) open
b.) closed
c.) clean
d.) unclean / untidy
Answer: clean
Solution: Our living place should be clean
4.) Tobacco chewing causes
a.) anemia
b.) periodontitis
c.) tuberculosis
d.) pneumonia
Answer: c.) tuberculosis
Solution: Tobacco chewing causes tuberculosis
5.) The first aid is to
a.) save money
b.) prevent scars
c.) prevent the medical care
d.) relieve the pain
Answer: d.) relieve the pain
Solution: The first aid is to relieve the pain
II.) Fill in the blanks.
1.) A group of people living together in a particular area is called community
2.) I am green colour box with garbage. I am biodegradable waste .
3.) Eyes are considered as window to the world.
4.) The hair follicles produce oil which keeps the hair smooth.
5.) Tuberculosis is caused by the bacterium mycobacterium tuberculosis .
III.) State true or false. If false, correct the statement.
1.) All food should be covered.
Answer: True
2.) Chicken pox is also known as leucoderma.
Answer: False
Solution: Chicken pox is also known as varicella
3.) Stomach ulcer is a non- communicable disease.
Answer: True
4.) Rabies is a fatal disease.
Answer: True
5.) First – degree burns damage the whole skin.
Answer: False
Correct Statement: First – degree burns damage the outer skin.
IV.) Match the following
| Rabies | Hydrophobia |
| Cholera | Cramps in legs |
| Tuberculosis | Mycobacterium |
| Hepatitis | Yellow Urine |
| Typhoid | Salmonella |
V.) Analogy.
1.) First degree burn : Epidermis :: Second degree burn : dermis
2.) Typhoid : Bacteria :: Hepatitis : virus
3.) Tuberculosis : Air :: Cholera : water
VI.) Consider the following statements and choose the correct option.
1.) Assertion: Oral hygiene is good.
Reason: Sound teeth has healthy gums with healthy surrounding tissues.
Answer: a) Both Assertion and Reason are true
2.) Assertion: Chicken pox is a viral communicable disease.
Reason: It is characterized by rashes on the whole body, fever, head ache and tiredness.
Answer: a) Both Assertion and Reason are true
VII.) Answer very briefly.
1.) What is hygiene?
Answer: Hygiene refers to the good habits and their practices which are followed to prevent diseases, maintain good health, especially through cleanliness, consumption of safe drinking water and proper disposal of sewage.
2.) Write about the right way of protecting the eyes.
Answer: The right way of Protecting the eyes that we should protect our eye from the diseases, pollution surroundings and climate condition.
i] Eat foods rich in vitamins like carrots,papaya.
ii] Do not work on Computer for a long time.
iii]Do not watch TV for a long time
iv] Do not rub your eyes unnecessarily.
v] If needed, wash your eyes only with cold water.
3.) How to keep your hair clean and healthy?
Answer: To keep your hair clean and healthy we should wash hair regularly and massage the scalp, which will help in remove of the dead skin cells, excess oil and dust. Rinsing the hair well with clear water and using good toothed comb for hair dressing is highly essential for the maintenance of hair.
4.) Sobi frequently plays with her mobile. Suggest your ideas to protect her eye from irritation?
Answer: 1) Firstly , we should guide Sobi not to play on mobile instead play on ground
2) phone should be watched by proper distance
3) Do not play for long take breaks in between and wash your eyes properly with cold water.
5.) Give any two communicable diseases, which spread in your locality during monsoon.
Answer: 1) Tuberculosis2) Cholera
6.) What first aid will you provide in the case of bruises?
Answer: Firstly, clean the area with clean water and now check the bruises is serious or not .
If yes then apply antispectic and then take the person to doctor
If not then use ice pack and message it properly.
7.) Ravi said, Ganga had minor burn, so I washed it with water. Do you agree with his statement? Explain, why?
Answer: Yes, Ravi had done right.In case of minor burns, the affected area should be washed with cold water and an antiseptic cream should be applied.
VIII.) Answer briefly.
1.) Why first aid is essential?
Answer: i] It saves the life.
ii] It prevents further bleeding and determine the condition of the patient.
iii] It relieves the pain.
iv] It provides a medical care available at the earliest.
2.) What steps you will follow to keep your teeth healthy?
Answer: The steps we will follow to keep your teeth healthy are
1) Brushing two times a day, which will prevent the formation of tartar and plaque on your teeth and gums.
2) Do mouthwash after very meal we had .
3) Avoid too much sugar and chocolate consumption.
4) Monthly dental checkup
3.) What does this picture mean?
Answer: Do not throw garbage here and there. Keep environment clean
4.) Distinguish communicable diseases and non-communicable diseases.
Answer:
|
Communicable Diseases |
Non-Communicable Diseases |
| 1. They are infectious diseases | 1. They are non Infectious diseases. |
| 2.They are caused by pathogens | 2. They are not caused by pathogens. |
| 3. They spread through air, water , food, contact,. | 3.They do not spread through any agency |
| 4. They are caused due to infection. | 4. They are not caused by infection but caused by nutritional deficiency or genetic Causes |
5.) Name the mode of transmission of communicable diseases.
Answer: The mode of transmission of communicable diseases are:
1) contaminated air,
2) contaminated water,
3) contaminated food
4) vectors(insects and other animals).
6.) Your friend says that her hair is thin, spares and lost very often. Suggest your ideas to reduce this problem.
Answer:
1.) The regular hair wash and massage of the scalp will remove the dead skin cells, excess oil and dust.
2.) Rinsing the hair well with clear water and using good toothed comb for hair dressing is highly essential for their maintenance.
3.) Eating a balanced diet which provides all nutrients needed for the body will promote hair growth.
4.) Applying oil to the skin and massaging the scalp will promote hair growth.
5.) Use of chemicals (dyes, shampoos) must be used to avoid hair loss
IX.) Answer in detail.
1.) Write about any three communicable diseases in detail.
Answer: A) Tuberculosis
1.) Tuberculosis (TB) is caused by Mycobacterium tuberculosis.
2.) It spreads from one person to another person through air, spitting, prolonged contact and sharing materials of the patient.
Symptoms
The symptoms are fever, weight loss, chronic cough, bloody spitting and difficulty in breathing.
Prevention and treatment
1.) Getting BCG vaccination.
2.) Giving special attention to the patient.
3.) Regular medication like DOT.
B) Cholera
1.) Cholera is caused by Vibrio cholera.
2.) It spreads through the consumption of contaminated food or water.
Symptoms
The symptoms of cholera is vomiting, severe diarrhoea and cramps in legs.
C)Hepatitis
1.) Hepatitis is one of the most dangerous and fatal diseases caused by Hepatitis virus- A, B, C, D, E.
2.) Its mode of transmission is contaminated water, sharing of needles and blood transfusion.
Symptoms
The symptoms of hepatitis are loss of appetite (anorexia), vomiting, eyes and urine turning to yellow colour.
Prevention and treatment
1.) Drinking boiled water
2.) Proper cleaning of hands
2.) List the situations in which first aid is given. What would you do if a person suffers from skin burns?
Answer: The situations in which first aid is given
1)Cut and Scratches
2) Burn
If a person suffers from skin burns the First Aid for Burning In case of minor burns, the affected area should be washed with cold water and an antiseptic cream should be applied. In case of severe burns, where deeper layers of tissues get destroyed and blisters appear, use of water should be avoided. The burnt area should be covered with a clean non-sticking cloth or bandages. Larger burns need immediate medical attention. It is very important to keep a fire extinguisher readily available.
3.) How the diseases are transmitted from one person to the other person?
Answer: Communicable diseases are those diseases that spread from one person to another. Healthy persons must be protected from people with communicable diseases. Diseases spread through contaminated air, water, food or vectors (insects and other animals).
1.) The communicable diseases are caused by disease causing microbes such as bacteria, viruses etc.
2.) These microbes are found in contaminated food, water, air etc.
3.) Some of them like the malarial parasite complete their life cycle in the body of a mosquito.
4.) Thus air food and water sweat act as modes of transmitting these microbes from an infected person to a healthy person.
X.) Higher order thinking question.
A person is sleeping during day time. Why does this happen to some people that they feel sleepy during day time in office or in the classroom? Have you ever come across such situation? Explain.
Answer: 1.) Many people are tired and do not have the energy to perform day to day activities. They tired and tend to sleep in the classroom or work place. Though sleep can be due to various reasons, the common reason for this condition is Anaemia.
2.) People who are Anaemic have less number of red blood cells in their blood.
3.) The red blood cells have hemoglobin which carries oxygen to all the cells of the body.
4.) People who are Anaemic will have less slow oxygen supply to all the cells of the body.
5.) Energy production in the cells is less and they feel tired and sleepy always. This is due to in the diet.
