3. What I need to know?
> You will learn why some materials are good conductors
of heat and electricity.
> Enumerate the characteristics of good conductors of
heat and explain the effect of heat in people and objects
cooks
our food and
make us
warm.
allow us to
use products
that are
brought
about by the
4. Electricity – is the flow of tiny particles called electrons
and protons. It can also mean the energy you get when
electrons flow from place to place.
Fire produces heat. Heat is a form of energy. It can used to
perform work, warm things up, cool things down and
generate electricity.
A heat source is certainly important for
cooking. When you used a stove to cook meal,
energy is transferred from the hot stove to the
pan and finally to the food being cooked. Heat
transfer is at work when heat from a source
reaches the food thus it is being cooked.
Electricity is a very useful form of energy. It can be used
to perform work such as heating our food, lighting up our
home, use for computer operation, motive power
entertainment applications.
5. What is
Conduction? Conductor? Insulator?
- is the process by which heat or electricity is
directly transmitted from one object to another where there
is a difference of temperature or of electrical potential
between adjoining objects, without movement of the
material or from one molecule to another.
- is using
.
6. – are materials that allow heat to transfer
upon direct contact with each other. Most metals are
excellent conductors of heat.
- are any materials that lets electric current flow through
it like nails, scissors and knives.
Bonding electrons are free to
move from atom to atom in an
electric conductor. They are not
held tightly by the nucleus.
7. Silver Copper aluminum Gold Bronze
Some examples of materials that are good conductors of
heat and electricity.
Metals- are solids with compact molecules that are
hard, ductile and malleable. They can react with other
substances and form new materials.
8. Not all materials are good conductors of heat and
electricity. They are called
Corks papers fabric rubber
The materials
hold onto its
electrons very
tightly
9. They do not carry any electricity or materials that do not
easily transmit electricity.
ceramics
leather
wood glass
