Question 1 Fill in the blanks

  1. In 1928,  Alexander Fleming discovered the first antibiotic called penicillin

  2.  Penicillin can prevent growth of bacteria

  3. Vaccines prevent diseases from occurring.
  4. Edward Jenner  discovered first vaccine against smallpox

Question 2 True or False

  1. Milk and water must be boiled to kill germs in them ___ True 
  2. Carbolic acid is kind of antibiotic – False
  3. Anti biotics can prevent growth of bacteria – True 
  4. The drug penicillin is antibiotic  – False

Question 3 :- Match the following 

Gabriel Daniel Fahrenheit – Thermometer 

Louis Pasteur – Pasteurization

Edward Jenner – Smallpox

Alexander Fleming – Penicillin 

René Laennec – Stethoscope

Question 4:- Define 

a) pasteurization:- The process of killing germs by boiling followed by rapid cooling is called pasteurization. 

b) Vaccine:- The substance that is put into the blood and protects the body from illness is known as vaccine. 

Question 5:- Give One word for 

  1. very tiny living things that causes diseases germs
  2. A chemical tha kill germs antiseptics . 

Question 6 :- Give reasons 

1) The discovery of antibiotics is an important milestone in medical history

Answer: – Antibiotics help to prevent the growth of bacteria which spread many diseases .that’s why the discovery of antibiotics is an important milestone in medical history.

2) the surgery was very unsafe 150 years ago

Answer:- In olden days many people died after the surgery  was performed due to the injection of the wounds that is why the surgery was unsafe 150 years ago.

Question 7:- answer in short

1) why does a doctor use a stethoscope?

Answer:- the doctor uses a stethoscope to hear the sound of the patients heartbeat and breathing.

2) what was louis Pasteur’s important contribution to the field of medicine

Answer: – Louis Pasteur discovered the process of killing germs by heating and then cooling, specially milk.

Question:- what are scanners?

Answer:- Scanners are pictures of the inside of a persons body . doctors use these pictures to see the the bones or internal organs of the patients .  

Question 8 :- Answer in brief

1) what is a microscope ? how does it help in finfing out what disease a patient is suffering from?


i) A microscope magnifies an object which can not be seen by the naked eyes.

ii)It makes the object look larger

iii) doctor take samples of blood and urine from the patients to study the germs and identify the diseases.

2) what simple rule should you follow to Remain healthy?

Answer:-  to  stay healthy we must eat nutritious food

We should keep our surroundings clean

We should have a bath everyday and exercise regularly

3) how does anesthesia help in surgery

Answer:- 1) Doctor give anesthesia before a surgery

2) It makes the patients unconscious

3) this helps the patients not feel pain during surgery

Question 9:- write the difference between medicine and Vaccine. 


A medicine is a chemical substance that is given in some kind of illness or disease.

A vaccine is a substance that is put into the blood and protect te body from illness

It is taken only if person is infected or ill 

It is taken before the encounter with the harmful bacteria or virus td
They are usually taken in by mouth.They are taken in by injection or by nose spray
They are not painful but tastelessSome vaccine are painful

Question 10:- Answer in long

1) How did Jenner discover the small pox vaccine


1) Edward Jenner observed that the people who sufferend from cowpox did not suffer from small pox

2) so he injected cowpox germs into the body of a young boy

3) a few weeks later he injected the small pox germs

4) The boy did not get small pox

5) thus he discovered vaccine for small pox