Classify the following as slow or fast changes.
(a) Burning of paper
(b) Formation of coal
(c) Growth of the baby
(d) Rusting of iron
(e) Burning a matchstick
(f) Breaking of glass tumbler
(g) Switching on the bulb
Answers
Explanation:
1)fast change
2)slow change
3)slow change
4)slow change
5)fast change
6)fast change
7) fast change
Answer:
a) Fast change
b) Slow change
c) Slow change
d) Slow change
e) Fast change
f) Fast change
g) Fast change
Explanation:
a) Burning of paper is a fast process as it takes a few minutes to burn the paper.
b) Formation of coal is a slow process because it takes many years for a small piece of coal to form.
c) Growth of a baby is a slow process because it takes many years for a baby to grow into an adult.
d) Rusting of iron is a slow process as it takes many years for iron to rust.
e) Burning of the matchstick is a fast change as it takes a fraction of seconds.
f) Breaking of glass tumbler is also a fast process as it takes a fraction of seconds.
g) Switching on the light bulb is a fast process as it takes a few seconds.