Answer 1:
Hi, I assume you are talking about the solid,
liquid and gas states of water. Almost
everything can be turned into these three states
of matter. The most direct way of making this
happen is to change the temperature. You
know when it is very cold, water turns into ice
and when it is very hot, we get water vapor or the
gas state of water. Since water is the most common
thing on Earth and the temperature required to
make this happen is close to temperature outside
and easily accessible, we can easily see the
transition between those three states of matter.
As for other material, the temperature
required to make the transition is quite
different, depending on the material. A good
and simple example is mercury. Below the
temperature of -38 Fahrenheit, mercury is solid;
above 674 F, it is gas; when the temperature is in
between these two, it is in the liquid state. That
is why mercury is liquid at room temperature. The
general tendency is that cold is good for solid
and hot is good for gas. Some material such as
iron stay as solid at room temperature. You
need to reach a really high temperature to make it
liquid and even higher temperature to turn it into
gas. To melt iron, you need to heat it up to
2800 F and you need an ever higher temperature to
turn it into gas.
Best,
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