WorksheetsDESIRABLE & UNDESIRABLE
Total questions: 10
Worksheet time: 7mins
Breaking of glass is ___ change.
Irreversible
Natural
Sudden
A desirable change is (a) as the change, which is beneficial or helpful to humans.
A desirable change could be brought about by nature or humans, physical or chemical in nature, could be occurring periodically or non-periodically, and could occur slowly or speedily.
True
False
A desirable change is generally carried out on purpose, mostly for the benefit of mankind.
Examples of Desirable Changes: curdling of milk and drying of clothes.
This statement is true
This statement is false
Both
What does undesirable change cause?
Undesirable changes lead to harmful and unwanted changes
An undesirable change is generally carried out on purpose, mostly for the benefit of mankind
Examples of undesirable changes are -
curdling of milk and drying of clothes.
rusting of iron, rotting of fruits and vegetables, and spilling of milk.
When we see a (a) substance growing on a slice of bread, we immediately identify it as mould, and throw it away, because eating it is harmful for our health.
Who was alexander fleming?
A shop wendor
Cricketer
an English microbiologist,
Scientist
As of today, penicillin is a well-known (a) . which is used to cure a number of infections caused by bacteria.
Alexander fleming saw something unusual while working in his laboratory in ..............
Complete the sentence
May , 2025
January, 1001
April, 1999
September, 1928.
