Scientific developments

Question 1

Name two diseases that have almost been eradicated through the use of vaccines.

Answer 1

Smallpox and Polio.

Question 2

Explain the canning process.

Answer 2

The food is heated to kill micro-organisms that spoil food. Air is forced out during the heating process and as the can cools it forms a vacuum seal. This makes the can airtight. This prevents the food from being contaminated.

Question 3

What has canning and refrigeration made possible?

Answer 3

Canning and refrigeration has made it possible to supply food to people all over the world.

Question 4

What has lowered death rates and increased population growth?

Answer 4

Scientific developments like increased understanding and control of disease and infection, improved sanitation and the use of canned food and refrigeration has…

Question 5

Give 5 examples of diseases that have been eliminated, as ways of preventing them have been discovered. (SMPTM (abbreviation sounds like symptom))

Answer 5

• Typhoid
• Measles
• Mumps
• Smallpox
• Polio

Question 6

What happened in 1918?

Answer 6

An influenza epidemic killed about 8 million people worldwide.

Question 7

What have sanitation systems been developed for?

Answer 7

To collect, store, treat, reuse, recycle and dispose of all human waste.