MEDIUM
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Changes that may take place on mixing two substances are always reversible.

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Important Questions on Changes Around Us

HARD
Science>Chemistry>Changes Around Us>Fast and Slow Changes
On cold chilly day Rakesh tried to open the metallic cap of an ink bottle. He found that metallic cap is struck. His mother told him to pour hot water on it. He poured hot water on the cap for a minute. He again tried to open the metallic cap. Now the metallic cap opened easily. He surprised and asked his observation to his elder brother Samir. Being a student of science Samir explained such things properly.
Answer the following questions based on above information :
   (i) What are the values displayed by Samir?
   (ii) Why was it easy to open metallic cap when warmed with water?
   (iii) What kind of change does take place in the cap of bottle and why?
EASY
Science>Chemistry>Changes Around Us>Fast and Slow Changes
Which of the following cause(s) change?
EASY
Science>Chemistry>Changes Around Us>Fast and Slow Changes
All the changes are undesirable.
MEDIUM
Science>Chemistry>Changes Around Us>Fast and Slow Changes
The term change means to become _____. (similar / different)
EASY
Science>Chemistry>Changes Around Us>Fast and Slow Changes
What is meant by the term ‘change’?
EASY
Science>Chemistry>Changes Around Us>Fast and Slow Changes
Give two examples of periodic change.
MEDIUM
Science>Chemistry>Changes Around Us>Fast and Slow Changes

Match the following:

1. Turning of milk into curd     (a) Desirable change
2. Change of seasons     (b) Chemical change
3. Change in length    (c) Slow change
4. Swinging of pendulum     (d) Heating
5. Blooming of flowers     (e) Periodic change



  


 

EASY
Science>Chemistry>Changes Around Us>Fast and Slow Changes
Which of the following is a fast change?
MEDIUM
Science>Chemistry>Changes Around Us>Fast and Slow Changes

Changes can be caused by _____.

HARD
Science>Chemistry>Changes Around Us>Fast and Slow Changes
What is the effect of heat on objects?
MEDIUM
Science>Chemistry>Changes Around Us>Fast and Slow Changes
Give an example each of slow and fast change.
EASY
Science>Chemistry>Changes Around Us>Fast and Slow Changes

Changing phases of the moon is an example of
 

MEDIUM
Science>Chemistry>Changes Around Us>Fast and Slow Changes
There is always a/an_____for a change.
EASY
Science>Chemistry>Changes Around Us>Fast and Slow Changes
What kind of change occurs when living organisms grow? (Slow change / Fast change)
EASY
Science>Chemistry>Changes Around Us>Fast and Slow Changes

Change of season is a

EASY
Science>Chemistry>Changes Around Us>Fast and Slow Changes

Bursting of crackers is a

HARD
Science>Chemistry>Changes Around Us>Fast and Slow Changes

Fill in the blanks to complete the mind map.

Question Image

 

EASY
Science>Chemistry>Changes Around Us>Fast and Slow Changes
Give an example of undesirable human-made change. [drainage system / pollution]
EASY
Science>Chemistry>Changes Around Us>Fast and Slow Changes
Growth in living organisms is
EASY
Science>Chemistry>Changes Around Us>Fast and Slow Changes
Changes are caused by heating.