Transcript Theme: Suitability of Materials

Theme: Suitability
of Materials
(Review)
MRS. MARITES L. DE LUNA
DECEMBER 9-12, 2014
LINKS FOR THE WEEK OF DECEMBER
8-12, 2014

http://schools.cbe.ab.ca/b682/pdfs/Science%207/Heat-andTemperature-Unit3_T4_T6.pdf

http://genesismission.jpl.nasa.gov/educate/scimodule/heat/

http://www.ck12.org/user:Y2FzdG9lX3RyYWN5QGFzZGsxMi5vcmc./b
ook/CK-12-Physical-Science-For-Middle-School/r2/section/17.0/

http://app.discoveryeducation.com/player/view/assetGuid/6932e1
75-5707-4469-bbdc-97cd6957882b
QUICK QUESTIONS : MONDAY

1. The 3 ways of heat transfer are :

2. The EM radiation with the highest frequency is
____________.

3. The EM radiation with the longest wave is
______________.

4. The home heating system is an example of
____________ type of heat transfer.

5. When hot air is on top of cold air – then afterwards
they shift because of heated molecules, that is an
example of _________heat transfer.
Quick questions : Wednesday

The transfer of heat due to touching surfaces is
__________.

All waves transmit ____________.

Circulating heat is called ____________.

The transfer of heat involving sunlight is
_________.

Which has a longer wavelength, ultraviolet or
visible light?
Quick Questions : Thursday

1. Molecules __________ when heated.

2. Molecules __________ when cooled.

3. The 3 ways of heat transfer are :

4. Weather – where hot air is on top of cold air is
called _______ type of heat transfer.

5. When the stove gives off heat for cooking, that
is an example of __________.
REMINDER FOR TOMORROW!
 1.
Our classes will be held in room 305 –
computer lab – all day including guided
study classes!
 2.
Bring your ear phones for the activity.
Monday First Period Activity : SAS
Curriculum Pathway Demo
Learning Centers for the Week :
December 8-12, 2014
 1.
Lunch box test
 2.
Observing Heat Energy (conductors and
insulators)
 3.
Comparing Energy Content
 4.
Heat Transfer
 5.
Smoke Rings
Essential Standards : December 812, 2014 : 6.p.3.3

By the end of the week , I can :

Review waves and heat transfer

Explain the suitability of materials for use in
technological design based on a response to
heat (to include conduction, expansion, and
contraction) and electrical energy (conductors
and insulators).

Perform activities related to waves and heat
transfer (review)
HOMEWORK : TO BE SUBMITTED
DECEMBER 15, 2014 (MONDAY)
 1.
How are materials chosen for different
technological design projects?
 2.
Compare and contrast insulators from
conductors. Give multiple examples of
each.
 3.
Explain how heating and cooling affect
some materials and how this relates to
their purpose and practical applications.
Vocabulary Word : Monday
Expand

Expand – to get bigger / larger

Sentence. Molecules of matter expand when heated.
New Concept : Monday
 Matter
can expand and contract based
on exposure to or removal from heat.
 Materials
are chosen based on their
response to heat and electrical energy.
 Materials
can be classified as conductors
or insulators.
Vocabulary Word : Wednesday
Contract

Contract – to decrease in size

Sentence – Molecules contract when cooled.
New Concept : Wednesday

Thermal energy is transferred through a material
by the collisions of atoms within the material.
Over time, thermal energy tends to spread out
through a material and from one material to
another if they are in contact (conduction).
Thermal energy can also be transferred by
means of currents in air, water, or other fluids
(convection).
Vocabulary Word (s) : Conservation
of Energy

Energy cannot be created out of nothing, nor can it be completely
destroyed. Energy can only change its form.
New Concept : Thursday

Some thermal energy in all materials is transformed into light energy
and radiated into the environment by electromagnetic waves; that
light energy can be transformed back into thermal energy when the
electromagnetic waves strike another material. As a result, a
material tends to cool down unless some other form of energy is
converted to thermal energy in the material.

There are some things that we use daily that we want to conduct
heat easily. Most of these items are made of materials that conduct
heat readily: aluminum, steel, copper. We call these materials
thermal conductors.
New Concept : Monday :
December 15, 2014

There are things that we do not want to conduct
heat (pot handles, spatula, cooking utensils) and
these items are generally made of materials that
limit heat transfer. We call such materials thermal
insulators. Expansion joint strips in bridges allow
for the bridge to expand in hot weather and not
break. These same joint strips allow for the bridge
to contract in cold weather and not break.
New Concept : Tuesday :
December 16, 2014

Electrical energy also passes through
conductors. An electrical conductor is a
material through which an electrical current can
flow easily. An electrical insulator is a material
through which electrical current does not readily
flow. Electrical conductors include most metals,
while most nonmetallic solids (rubber, glass,
porcelain, ceramic) are insulators.
NCFE QUESTION FOR THE WEEK

Which best describes why metals are used for making
pots and pans that are used for cooking?

a. Metals conduct heat and have a high melting point.

b. Metals conduct heat and have a low melting point.

c. Metals radiate heat and have a high melting point.

d. Metals radiate heat and have a low melting point.