Question

in Table a
compressed. Take a metal key and try
freshly cut surfaces of metal rodat
if they have lustre
Hardness
when you press different materials with
your hands, some of them may be hard
to compress while others can be easily
Fig. 4.4 What disappears, who
Table 4.3 Mixing differ
materials in w
Substance
Disappes
does no
to scratch with it, the surface of a piece
of wood, aluminium, a piece of stone, a
nail, candle, chalk, any other material
or object. You can easily scratch some
materials, while some cannot be
scratched so easily. Materials which can
be compressed or scratched easily are
called soft while some other materials
which are difficult to compress are called
hard. For example, cotton or sponge is
soft while iron is hard.
In appearance, materials can have
lustre
Salt
Disappea
water
Sugar
Sand​

Answer 1

Answer:

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