The mass per unit volume of a
substance is called density.
(density = mass/volume).
Arrange the following in order of
increasing density . air, exhaust
from chimneys, honey, water,
chalk, cotton and iron.
2. (a) Tabulate the differences in
the characterisitcs of states
of matter.
(b) Comment upon the following:
rigidity, compressibility,
fluidity, filling a gas
container, shape, kinetic
energy and density.
3. Give reasons
(a) A gas fills completely the
vessel in which it is kept.
(b) A gas exerts pressure on the
walls of the container.
(c) A wooden table should be
called a solid.
(d) We can easily move our hand
in air but to do the same
through a solid block of wood
we need a karate expert.
4. Liquids generally have lower
density as compared to solids.
But you must have observed that
ice floats on water. Find out why.
1.4 Can Matter Change its State?
We all know from our observation that water
can exist in three states of matter.
. solid, as ice,
. liquid, as the familiar water, and
. gas, as water vapour.
What happens inside the matter during
this change
Answers
Answer:
The mass per unit volume of a
substance is called density.
(density = mass/volume).
Arrange the following in order of
increasing density . air, exhaust
from chimneys, honey, water,
chalk, cotton and iron.
2. (a) Tabulate the differences in
the characterisitcs of states
of matter.
(b) Comment upon the following:
rigidity, compressibility,
fluidity, filling a gas
container, shape, kinetic
energy and density.
3. Give reasons
(a) A gas fills completely the
vessel in which it is kept.
(b) A gas exerts pressure on the
walls of the container.
(c) A wooden table should be
called a solid.
(d) We can easily move our hand
in air but to do the same
through a solid block of wood
we need a karate expert.
4. Liquids generally have lower
density as compared to solids.
But you must have observed that
ice floats on water. Find out why.
1.4 Can Matter Change its State?
We all know from our observation that water
can exist in three states of matter.
. solid, as ice,
. liquid, as the familiar water, and
. gas, as water vapour.
What happens inside the matter during
this change