CH 2: USING THE SCIENTIFIC METHOD Short Questions with Answers
CH 2: USING THE SCIENTIFIC METHOD
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.
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