Dont' let the heat escape!
1. lista: a)4 ways in which heat can escape from a house b) 4 ways of prevening heat from escaping.
2. Which methods of insulation use trapped air as an insulator?
3. Why is aluminum foil fixed above ceilings?
4. Explain how heat can escape throught an unused fireplace .
5. How much did the black: a) pay for insulation b) save each year?
6. a)the black only really began to save money after two years explain this b)how many years passed before the other families,began to save.
7. If you had to insulate a house,wich two methods would you use firs,and wity?

1/R:b)ways of preveing heat from escaping
2/R:any material that conducts heat poorly or electricity and used to suppress the flow.
3/R:
4/R:the heat comes out through smoke stacks or windows
5/R:the blacks put insulation in the loft. they laid shiny alumniun foil above the ceiling
6/R:the blacks the browns the greens and the withes had two things in common they lived in he same type of house and had huge heating bills
7/R:icopor fiberglass insulation and wood heat things produscan

scales of a thermometer (human heat)
low heat-0-35¨c
normal heat-36¨c-37,5¨c
high heat-38-......

thermometer:instrument used to measure the temperature.the most used thermometer is the made up of mercury,formed by a capillary of glass of a uniform diameter comunicated by an end with a bladder full with mercury.

types of thermometer:
*made of glass and using mercury.
*made of glass and using niquel oxid, cobalt and magnesium.
*for high temperatures:made of metal using electronic circuits.

1.The thermometer is an instrument for measuring temperature. Since its invention has evolved greatly, especially since it was started to manufacture digital electronic thermometers. Initial thermometers were manufactured based on the principle of expansion, it is preferred to use materials with a high coefficient of expansion so that, with increasing temperature, dilation of the material is easily visible. The base metal that was used in this type of mercury thermometers has been locked in a glass tube incorpo.

The scale used in most countries is the centigrade (º C), also called Celsius since 1948, in honor of Anders Celsius (1701 to 1744). On this scale, zero (0 º C) and one hundred (100 º C) degrees correspond to the freezing point and boiling point of water, both at 1 atmosphere pressure. Other thermometer scales are: Fahrenheit (º F), proposed by Gabriel Fahrenheit in 1724 [citation needed], which is the unit of temperature in the English system of units, used mainly in United States. Réaumur degree (º R), into disuse. Is due to René-Antoine Ferchault of Reamur (1683-1757). The relationship with the Celsius scale is TReamur = (4 / 5) * TCelsius Kelvin (K) and absolute temperature, temperature unit in the International System of Units. Its zero is unattainable by definition and is equivalent to -273.15 ° C.rating a graduated scale.

2.There is no firm agreement amongst neurologists as to exactly how many senses there are. The disagreements stem from a lack of consensus as to what the definition of a sense should be. Although school children are still routinely taught that there are five senses (sight, hearing, touch, smell, taste; a classification first devised by Aristotle), it is generally agreed that there are at least nine different senses in humans, and a minimum of two more observed in other organisms.

The skin is the outer covering of the body. In humans, it is the largest organ of the integumentary system made up of multiple layers of epithelial tissues, and guards the underlying muscles, bones, ligaments and internal organs.[1] Skin of a different nature exists in amphibians, reptiles, birds.[2Human skin is not unlike that of most other mammals except that it is not protected by a pelt and appears hairless though in fact nearly all human skin is covered with hair follicles.


4.In the city of Bangalore, India, the main annual festival of the Karaga draws its ritual personnel from a network of wrestling houses, where concepts of the conservation and channeling of bodily fluids underlie training. These concepts are, in turn, linked to an older model of urban planning in which artificial water bodies and gardening were integral components of the built environment. As the city’s population has grown and its economy shifted toward manufacturing and high technology, a different model of planning has slowly destroyed the older ecological system while inserting large sports complexes as important urban nodes. There is a simultaneous movement to link sports, beauty contests, and media as entertainment, with a concomitant redefinition of the body.

5.The body's enzymatic processes slow over 10%, sometimes 20% per degree of temperature below optimum. Slower chemical function, repair, and disposal of local and environmental toxins puts the body below expected function. This can cause many syndromes and symptoms, such as those listed to the right. Obviously, not all chronic problems are related to chronic low body temperature; but if several of these are noted, it may be prudent to measure one's body temperature on a routine basis to see if low body temperature is a possibility.

Heat and temperature

heat:is energy in transit it is transmitted between bodies wich are at different temperatures and wich come into contact with each other.

temperature:is a physical magnitude related to the amout of heat that a body can receive and absorb.it is a type of energy wich is not stored, it only appears in the transfer of energy.

heat transmission in bodies:
-conduction:is the trasmission of heat throug an solid object;example:a piece of metal in the fire.
-convention:transfers heat through an interchange of could and hot inolecules:ex heating water in a tea pot.
-radiation:is the transfers of heat by electromagnetic radiation, generally
with infrared.ex is the way a room is warmed.

homework
investigate:

-termometer and thermometer scales.
-perception of heat the skin.the sense of touch.
-burns
-hot bodies.
-could bodies.

22/05/09
Amplitud
La amplitud de una onda de sonido es el grado de movimiento de las moléculas de aire en la onda, que corresponde a la intensidad del enrarecimiento y compresión que la acompañan. Cuanto mayor es la amplitud de la onda, más intensamente golpean las moléculas el tímpano y más fuerte es el sonido percibido.

Intensidad
La intensidad fisiológica o sensación sonora de un sonido se mide en decibelios (dB). Por ejemplo, el umbral de la audición está en 0 dB, la intensidad fisiológica de un susurro corresponde a unos 10 dB y el ruido de las olas en la costa a unos 40 dB. La escala de sensación sonora es logarítmica, lo que significa que un aumento de 10 dB corresponde a una intensidad 10 veces mayor: por ejemplo, el ruido de las olas en la costa es 1.000 veces más intenso que un susurro, lo que equivale a un aumento de 30 dB.

Sound:
Is a traveling wave which is an osilation of pressure through a solid liquid or gas.
Perception: for humans, hearing is normally limited to the frecuessies between about 12 Hz and 20.000 Hz although this limits are not defined.

Homework:
-physics of sound
-longituditional and transversal waves
-sound waves properties
-speed of sound

light
No one can see anything in a completely darkned room. There has to be
Light before you can see. You see when light enters you eye. And so you have to know something about light to understand how the eyes work.

What is light?
Light is a kind of energy .it’s a type of radiation. Light energy is given off by the sun, by candles, and other light sources.
Light energy travels from one place to another. The light travels in straight lines (you can see that from the pictures of the sun) it’s often useful to think of the light travelling through the air at 300.000 km each second.






Shadows and reflexions:
Because light travels in straight lines, shadows form.

What’s a shadow?
Is an area behind an object where no light from a light source reaches.
When the sun shines on a object like a tree, the sun’s rays cannot bend round corners to reach the area behind it. That’s why that
The area behind it. That’s why the area behind the tree is dark, and that’s what make
The shadous.
Light rays can be bounced off or reflected of and object. You see this board because rays of light are being reflected from it in to your eye shiny surface, like mirrors reflect light you can see how a mirror reflect to the rays.
Class work:
-investigate
1. What is a light source? Give some examples
2. Write two facts about light rays.
A. a shadow
B. reflecting light?
4. Why does a shadow form behind you when the sun shines?
5. Mirrors and polished cars reflect light well. Walls don’t why not?
6. Try to find out: does the moon give off light or reflect it?
Development
1) Lantern, phosphors, lamp bulb landle.
2) A) That your rays to direct.
b) To produce shadow.
3) Shadow. Is where not reflect the the light,
-reflecting light. Produce shadow.
4) Because the light no reflec my.
straigh line

5)Because the mirrors have shiny.

6)NO, the moon is a satellite it does not possess their own light, the light of the moon we see q is the reflection of sunlight on its surface, so depending on where we see that sometimes the full, half rising etc, and that happens light when it is blocked from the sun ...