My ideas about chemistry so far…
What are the states of matter? Describe them.
How do states of matter change?
The states of matter are solid liquid and gas. Molecules in a
solid are tightly packed so that they retain a certain shape.
Furthermore, molecules in a liquid are packed loosely so they
do not retain a certain shape by themselves. Liquids normally
retain the shape of a “container” that they are “poured” in. In
addition, molecules in a gas float around. They do not have a
shape and can float freely around.
There are many ways that states can
change. For example, most solids
become a liquid when they are
heated to a certain point. This is
known as the melting point. Some
solids melting point are below zero.
Furthermore, most liquids evaporate
into vapour at their boiling point. This
then becomes a gas. In addition,
gases condense into liquid qhen they
are cooled. Liquids become solids for
example water becomes ice when
cooled. (sublimation salt-gas)
What are physical changes?
What are chemical changes?
Why is chemistry useful?
Physical Changes are changes that can
be “seen” through size, colour, shape,
mass, smell, sight and taste. Physical
changes are also reversible.
Chemical changes are changes
(normally cannot be seen directly
(like when it happens)). Chemical
changes are changes that change the
molecular structure of the substance
to create a completely new
substance. Furthermore, Chemical
Changes are irreversible.
Chemical Warfare, Medicine
Examples:
Describe other ideas:
Atom
Molecules
Mixtures
Chemical Change
Physical Change
Curious Questions: