Instruction: Fill in the blanks with the correct terms found in the word bank, Write your
answers on the blanks provided.



When thermal energy is transformed, (1)______
is always produced. Heat is
a thermal energy that is transferred from one object to another due to the (2)______
in their temperatures or simply energy in (3)______
When the object becomes
warmer, it means that it (4)______
energy. When it becomes cooler, it means that it
(5)______
energy. Heat energy always transfers from object of (6)______
temperature to object of (7)______
temperature. Heat transfer stops when both
objects are of the (8)______ temperature. Heat can be transferred in three ways:
conduction, convection, and radiation.
(9)______
takes place due to the vibrating and colliding particles of
objects that are in contact. It can take place in solids, liquids, and gases but it takes
place best in (10)______
Conductivity refers to the ability of the material to conduct
heat. The higher the conductivity of the object, the better it conducts heat. Metals are
mostly good (11)______
of heat since they absorb heat faster. Solid
materials which do not absorb heat easily are good (12)______
such as
rubber and cloth.
(13)______
takes place in fluids such as liquids and gases of
different temperature because their particles can move around. In convection, the heat
is transferred by the particles themselves. During convection, warmer liquid or gas
expands and rise up while cooler liquid or gas sinks.
Heat transfer by (14)______
does not need particles or a medium
to take place. Different surfaces emit or absorb heat differently. Dull and black surfaces
(15)______
heat better than bright and shiny surfaces.​