Selina solutions concise biology class 6 icse Solutions for Chapter 7 health and hygiene

Q1) Describe the ways in which communicable diseases are transmitted through various indirect methods.

Q2) List 3 ways by which you should keep your environment clean.

Q3) Vaccines are prepared, give the names of one disease for which each type of vaccine is used

Q1) Put a tick against the correct alternative in the following statements.

(a) Malaria is caused by:

1. Bacteria
2. Protozoan
3. Fungi
4. Virus

(b) Deficiency of calcium causes

1. Poor growth of teeth and gums

2. Goitre

3. Anaemia

4. Polio

(c) Hay fever and asthma are

1. Deficiency disease

2. Genetic disease

3. Organic disease

4. Allergy disease

(d) Infectious diseases can be prevented by:

1. Medicines

2. Proper food

3. Immunisation

4. Exercise

(e) Which one of the following is a genetic disease?

1. Scurvy

2. Leukaemia

3. Goitre

4. Haemophilia

(f) Which one of the following is a degenerative disease?

1. Thalassemia

2. Ben-ben

3. Cataract

4. Diabetes

(g) Pellagra is one disease caused by the deficiency of:

1. Vit.b3

2. Vit.b1

3. Vit.c

4. Vit.d

(h) deficiency of iodine in one’s food can cause:

1. Goitre

2. Anaemia

3. Brittle bones

4. Pain in muscle contraction

(i) Which one of the following vitamin deficiency diseases can be cured by eating a diet which includes green leafy vegetables, banana, cereals, egg yolk?

1. Goitre

2. Anaemia

3. Brittle bones

4. Pain in muscle contraction

(j) Which one of the following vitamin deficiency diseases can be cured by eating a diet which includes carrot, yellow fruits, vegetables, butter, milk, fish?

1. Beri-beri

2. Dermatitis

3. Night blindness

4. Scurvy

(k) which one of the following is a communicable disease?

1. Measles

2. Cancer

3. Heart stroke

4. Allergy

Q1)

1. What is a non-communicable disease?
2. What is a deficiency disease
3. What are communicable diseases? How can they be avoided?
4. Biting nails should be strictly avoided. Give reason.
5. Regular exercise and proper rest is a must. Give reason.
6. Children eating more fast food tend to suffer from obesity (overweight). Comment.
7. How can we control the spreading of diseases by mosquitoes and houseflies?

Q2) Name the following:

1. A bacterial disease caused due to contaminated water
2. A disease caused due to Plasmodium
3. A disease caused due to the bite of female Culex mosquito
4. A viral disease sprayed by the bite of a dog
5. Two diseases caused due to deficiency of protein in the diet of a child
6. Any three water-borne diseases.
7. A viral disease caused due to unhealthy sexual contact.
8. A disease caused due to choking of the coronary artery.

Q3) Write short notes on the following

Disease, immunisation, pathogen, allergy, AIDS.

Q4) Fill in the blanks

1. Anaemia is caused due to the deficiency of ____
2. Deficiency of vitamin.D causes ______ in children.
3. Deficiency of iodine in the diet may cause _____
4. Kwashiorkor is caused due to the deficiency of ______
5. Diabetes is caused due to under secretion of _______
6. Haemophilia is a disease caused due to slow ______ of the blood.

Q5) Find the odd one out:

1. Typhoid, cholera, jaundice, tuberculosis, tetanus.
2. Cold, malaria, measles, mumps
3. Scurvy, rickets, polio, pellagra, night-blindness
4. Proteins, carbohydrates, fats, minerals, cancer.

Q6) Fill in the blanks

Q7) Given below is a crossword puzzle. Read the clues across and down. and fill up the blank squares.

Clues across

1. Category of a pathogen that causes diseases, like common cold and mumps.
2. This is the vaccine for preventing tuberculosis.
3. An organ usually affected by tuberculosis
4. The jumbled spelling of one of the most common insects which visits our exposed foods and contaminate them.
5. Cover this part of your body by a handkerchief while sneezing to prevent droplet infection to others.
6. These may readily grow in your hair if you do not wash it regularly.
7. A disease that weakens the body’s defence system against infections.

Clues Down

8. Germ or germ- substance introduced into the body to prevent the occurrence of an infectious disease.
9. A disease caused by an infected dog and which affects the central nervous system
10. A disease in which the eyes the skin and the urine turn yellow.
11. The disease pertussis is popularly known as whooping.