Q1: How has the scientific method helped us in our fight against disease?

ANS: The scientific method has helped us in our fight against disease with the invention of modern medicine and epidemic control.

Q2: Write a note on the better sanitary conditions available in our cities today and compare them with what they were like a hundred years ago? OR What is sanitary condition of our cities today?

ANS: Today streets are paved. Dirty water flows in pipes. People live in clean area. While a hundred years ago, the streets were unpaved and poorly drained. The garbage was thrown into the streets. 

Q3: How has the scientific method helped us in the production and preservation of foods? OR How is food preserved today? OR What are the modern methods of preservation of food? OR How is food preserved without being poisoned?

ANS:  Scientific method has helped us by making various fertilizers and pesticides. Moreover, food is preserved by quick-freeze method. Modern methods of selecting, grading and processing food are free from the danger of poisoning it.

Q4: How has scientific method enabled us to get over the old fears? OR How are we different from our forefathers in outlook? OR We are now generally less fearful than our ancestors. What were our ancestors afraid of?

ANS: Our forefathers were superstitious. They believed in the signs of good or bad luck. They were afraid of black cats, broken mirrors and the number 13.  But now old fears are got over because the scientific method has taught us that they have no solid basis. There is always a reason for everything.

Q5: How is Los Angeles supplied with water? OR How are the needs of water of Los Angles fulfilled? OR What is the name of the river from which water is supplied to Los Angeles? OR Which is the name of the city to which Colorado’s water is supplied? OR How much water is supplied to the city of Los Angeles?

ANS: Water is supplied to Los Angeles by a pipeline from the Colorado river which is 544 kilometers away.

Q6: How was food preserved in the past?

ANS: In the past, food was preserved by canning, pickling and drying. Meat was preserved by salting, drying or freezing in cold weather.

Q7: What is the method of dehydration for preserving food? OR What is the practical method of preserving food today?

ANS: Dehydration is the removal of water from food. It is a practical method of preservation.