Sunday, 23 December 2007
Online Physics lessons from the Massachussets Institute of Technology
Professor Lewin delivers his lectures with the panache of Julia Child bringing French cooking to amateurs and the zany theatricality of YouTube’s greatest hits. He is part of a new generation of academic stars who hold forth in cyberspace on their college Web sites and even, without charge, on iTunes U, which went up in May on Apple’s iTunes Store.
In his lectures at ocw.mit.edu, Professor Lewin beats a student with cat fur to demonstrate electrostatics. Wearing shorts, sandals with socks and a pith helmet — nerd safari garb — he fires a cannon loaded with a golf ball at a stuffed monkey wearing a bulletproof vest to demonstrate the trajectories of objects in free fall.
He rides a fire-extinguisher-propelled tricycle across his classroom to show how a rocket lifts off.
Last week, Yale put some of its most popular undergraduate courses and professors online free. The list includes Controversies in Astrophysics with Charles Bailyn, Modern Poetry with Langdon Hammer and Introduction to the Old Testament with Christine Hayes.
M.I.T. recently expanded its online classes by opening a site aimed at high school students and teachers. Judging from his fan e-mail, Professor Lewin, who is among those featured on the new site, appeals to students of all ages.
“We have here the mother of all pendulums!” he declares, hoisting his 6-foot-2, 170-pound self on a 30-pound steel ball attached to a pendulum hanging from the ceiling. He swings across the stage, holding himself nearly horizontal as his hair blows in the breeze he created.
The point: that a period of a pendulum is independent of the mass — the steel ball, plus one professor — hanging from it.
“Physics works!” Professor Lewin shouts, as the classroom explodes in cheers.
“Hi, Prof. Lewin!!” a fan who identified himself as a 17-year-old from China wrote. “I love your inspiring lectures and I love MIT!!!”
The professor, who is from the Netherlands, said that teaching a required course in introductory physics to M.I.T. students made him realize “that what really counts is to make them love physics, to make them love science.”
He said he spent 25 hours preparing each new lecture, choreographing every detail and stripping out every extra sentence.
“Clarity is the word,” he said.
Tuesday, 18 December 2007
The root of the plants
1. Which is the part of the plant that absorbs substances from the ground?
a) The leaves.
b) The flowers.
c) The roots.
d) The stem.
2. Which the these is a type of root?
a) Graft.
b) Straight.
c) Short.
d) Green.
3. What do the hairs of the lower layer of the root absorb?
a) Water.
b) Nothing.
c) Mineral salts.
d) Water and mineral salts.
4. Different types of roots depend on...
a) Their form and colour.
b) Their colour and function.
c) Their form and function.
d) Their form.
5. Where are the secondary roots born?
a) From the flowers.
b) From the main roots.
c) From the leaves.
d) From the stem.
Monday, 17 December 2007
Some illens relationed with food.
Grammar Tip: The and uncountable nouns
Sunday, 16 December 2007
The magnesium and the potassium
The potassium is a chemical element of the periodic table which symbol is K (of the Latin Kalium) and which atomic number is 19. It is an alkaline metal, white-silver what abound in the nature, in the elements related to the salt water and other minerals. It oxidi rapid in the air, is very a reagent, specially in water, and looks chemical the sodium. It is a chemical element essential.
THE OIL
Saturday, 15 December 2007
1) COOPER:
- Colour: red.
- Characteristics:
- Malleable.
- Good electricity conductor.
- Uses:
- Wires that carry electricity.
- Pipes.
- Decoration.
2) SILVER:
- Colour: white.
- Characteristics: It’s the best electricity conductor.
- Uses:
- Jewellery.
- Electrodes for electrolysis.
3) GOLD:
- Colour: yelow.
- Characteristics:
- Heavy.
- Malleable.
- Uses:
- Jewellery.
- Ornaments.
4) PLATINUM:
- Colour: silver white.
- Characteristics:
- Very heavy.
- Hard/ tough.
- Uses:
- Jewellery.
- Electrodes.
5) MERCURY:
- Colour: silver white.
- Characteristics:
- A lot of metals are dissolved in it.
- Toxic.
- Uses: It was used to make thermometers, barometers, etc.
6) ZINC:
- Colour: bluish-white.
- Characteristics: easily broken/fragile.
- Uses:
- To make galvanized iron.
- Cans, jerry cans...
- An alloy of cooper and zinc in brass.
7) TIN:
- Colour: white.
- Characteristics: soft and malleable.
- Uses:
- Soldering.
- To make tinplates.
- Alloys (bronze).
8) LEAD:
- Colour: grey.
- Charasteristics: It melts easily.
- Uses:
- Welding.
- To make bullets, cannon balls, pellets,...
9) ALUMINIUM:
- Colour: silver white.
- Charasteristics: light and malleable.
- Uses:
- To make planes and other vehicles.
- Utensils.
10) URANIUM:
- Colour: dark dun or black with yellow or green spots.
- Characteristics:
- Heavy.
- Radioactive.
- Uses: nuclear energy.
11) IRON:
- Colour: grey (mild iron).
- Characteristics: When it’s outdoors it goes rusty quickly.
- Uses:
- Building materials.
- Boilermaking, etc.
Oxygen
There is planty of it in the lithosphere and the hydrosphere, more than any other element. It can be mixed with air and it can be combined with water and with many other minerals.
· PROPERTIES: It’s a colourless, odeorless and tasteless gas and lightly water soluble. Oxygen has a great chemical activity, that’s why it can react with hearly all elements forming a lot of combinations that are in general called oxides.
It is essential for the breathing process in living things.
You can find it in two ways: normal oxygen, this one has its molecules formed with two atoms of oxygen and ozone, its molecules have three oxygen atoms.
· HOW TO OBTAIN IT: It can be obtained in laboratories in a very easy way, heating chlorine potassium.
For industry applications, big quantities of oxyegn can be obtained from air and from water.
· APPLICATIONS: Planty of oxyegn is used in autogenous welding. It’s also used in medicina, for diving, for climbing,…
The root of the plants is the part of the plant that pays attention to the ground to which it is nourished. But at the present time the botanists affirm that a difference between root and stem does not exist. We could speak of the root as of the part of the plant that absorbs substances of the ground.
The end of the root is covered by the layer or caliptra, followed of another cap with absorbent hairs that allow to the acquisition of water and mineral salts. When the plant ages, these hairs fall. The secondary roots are born of the main root.
Different types from roots, depending of their form and function exist: when they work like reserve organs, the main root sinks in the ground. Also roots with ramifications that extend in beams and aerial roots in plants exist that are not fixed in the ground... In addition we can hear other terms referred to the types by roots: fibrous, graft, napiforme, to columnar...
CALCULATION OF THE DEFORMACIÓN FORCE ONE THAT PRODUCED IN WHARF
You need this:
- Wharf
- Bracket
- A walnut
- A metal bar
- Portweights
- Weights
- Paper
- Tape
How to make the experience:
- Build a rule of paper and set this rule to the metal bar of the apparatus. Thus it is vertical.
- Hang wharf bar and then suspended portapesas at the end of the dock. Notes on the scale length and write their values.
- Hang the wharf with different weights (25, 50, 75, 100 and 125 g) and enter what is its length reaches the wharf with each of the weights.
You can make this experience anywhere with these elements and these steps. It is a curious experience and funny.
Friday, 14 December 2007
The oil
The conditions to favour the formation of oil are:
-Not very much deep sea, with many nutrients.
-Sediments.
-Not much movement of water in the bottom.
The products formed by oil to appear in the three states of matter:
-Liquid: raw
-Solid: tarmac
-Gaseous: natural gas
Some adrift of oil are:
-Tarmac
-Gas
-Petrol
Bulimia and anorexia
Bulimia is a mental disorder related to food.The person who has it eats a lot of food in a short time. Then, she thinks she is fat and feels guilty. The person induces vomit and expels the food that she has ingested.
Anorexia is a similar illness, but it consists in not eating anything.These people think that their weight is very high.
These two illnesses can end up in death but many times they have cure becouse now, there are specialized clinics.
Wednesday, 12 December 2007
Dissolutions
Hi!
I'm going to write about dissolutions.
Dissolutions are mixtures which are formed by dissolute and solvent. Amount of dissolute has to be smaller then amout of solvent. There are two kinds of dissolutions : homogeneous dissolutions and heterogeneous dissolutions.
In homogeneous dissolutions we can't recognize their component.
We can preparate dissolutions at the laboratory when we study chemistry.
Bye!
[ Instruments to measure the temperature ]
THE SIMPLE DISTILLATION
When one makes boil the dissolution contained in the flask, the volatile solvent that has a minor boiling-point, it evaporates and leaves in the flask a residue of soluto not volatile.
Physics and Chemistry
Chemistry is the science concerned with the composition, structure and properties of matter, as well as the changes it undergoes during chemical reactions. Chemistry is a physical science related to studies of various atoms, molecules and crystals.
filtration
through a permeable fabric or porous bed of materials. Groundwater is naturally filtered
as it flows through porous layers of soil. However, surface water and groundwater under
the influence of surface water is subject to contamination from many sources. Some
contaminants pose a threat to human health, and filtration is one of the oldest and
simplest methods of removing them. Federal and state laws require many water systems
to filter their water. Filtration methods include slow and rapid sand filtration, diatomaceous
earth filtration, direct filtration, packaged filtration, membrane filtration, and
cartridge filtration.
Helium
Elemental helium is a colourless odourless monoatomic gas. Helium is the second most abundant element in the universe after hydrogen. α particles are doubly ionised helium atoms, He2+.
Helium is used in lighter than air balloons and while heavier than hydrogen, is far safer since helium does not burn. Speaking after breathing an atmosphere rich in helium results in a squeaky voice (don't try it!).
THE OIL
The conditions that favor the creation of the oil are:
- Slightly deep and rich seas in nutrients.
- Fluvial contributions.
- Little water movement in the fund.
The majority of the oil is in the stock exchanges impregnating rocks. These finds are to thousands of meters of depth, because of it to extract the oil it is necessary to make a well and take it up to the surface.
Monday, 10 December 2007
Types of food
- Food energy: they are a source of energy for our bodies to function and do their vital functions. These are foods with glícidos and lipids. These foods are bread, chocolate, grease ...
- Food plastics or trainers: They are required to form cells, tissues and organs. They are essential for nutrition and have many proteins. These foods are fish, meat, yogurth ...
Friday, 7 December 2007
Friday, 30 November 2007
feeding and nutrition
Nutrients are chemical substances from which we obtain energy.These nutrients are contained in the food.
Feeding is a conscious and voluntary act.
THE WHEEL OF THE FOOD
Group 1 : regulatory food (fruit and vegetables). They contribute vitamins and minerals.
Group 2 : energetic food (bread, other cereals and potatoes). They contribute carbohydrates.
Group 3 : structural food (milk and derivatives). They contribute calcium and proteins.
Group 4 : structural food (meat, fish,eggs). They contribute proteins.
Group 5 : energetic food (food containing fats and food containing sugar). They contribute fats and carbohydrates.
A varied nourishment has to include food of all the groups of the wheel, in the adequate proportion.
Tuesday, 27 November 2007
FIND THE NUTRIENTS
It is important to know that some foods fit into more than one nutrient group. The examples we have given are for foods that are particularly rich in these nutrients.
-This section belongs to Carbohydrates: cereal, potato, bread...
-This section belongs to Vitamins and Minerals: pineapple, strawberry, banana, lettuce,tomato...
-This section belongs to Calcium: yoghurt, cheese, milk...
-This section belongs to Fats: ace-cream, cookie, chocolat...
-This section belongs to Protein: fish, egg, flesh...
Neon
Neon was discovered in United Kingdom by Ramsay and Travers.It´s a rare gaseous element: in the universe there is 0,13% of neon. It´s density is 0.9 g/l. Its melting point is -248.59°C and its boiling point -246.08ºC.
Uses:
Althought neon a advertising signs account for the bulk of its use, neon also functions in high-voltage indicators, lightning arrestors, wave meter tubes, and TV tubes. Neon and helium are used in making gas lasers. Liquid neon is now commercially available and is finding important application as an economical cryogenic refrigerant.
Saturday, 24 November 2007
James Prescott Joule
(1818 - 1889)
He was a very important physicist in his time. He´s famous by his investigation in electricity and thermodynamic.
Joule studied the nature of the heat and he discovered his connection with the mechanical work. This led him at the theory of energy´s conservation. It was the first law of thermodynamic. In his honour, the international unit of energy was call joule.
James discovered the connection of the electric current of the resistance with the evaporated heat, called Joule´s Law.
He cooperated with Thomson in the investigation of the cooling of gas.They discovered the Joule-Thomson´s Efect.
Thursday, 22 November 2007
A scientist shares his thoughts on why research in the sciences matters
Jesus Pando is a cosmologist at DePaul University in Chicago, Illinois. His research includes studying what’s called the Cosmic Microwave Background Radiation, the earliest light we can see, just 300,000 years after the Big Bang. Earth & Sky caught up with Dr. Pando at a meeting of the Society for the Advancement of Chicanos and Native Americans in Science. He said that basic research should be supported for more than just its immediate applications.
Jesus Pando: I think instead, you appeal to the poet, to the philosopher in people. People have always looked at the stars, and wondered what it was that was there. I think that everyone has curiosity. Everyone wants to know about the universe around them. And I think the way you justify basic research is that we are satisfying that curiosity that all of us, I think, have. All of us are interested in how life began. All of us are interested in how the universe began. All of us are interested in these kinds of things. And we’re interested in them certainly from a practical point of view, but also, I think, just because we’re curious people.
That was DePaul University cosmologist Jesus Pando.
Our thanks today to Research Corporation, America’s first foundation for science advancement
Wednesday, 21 November 2007
Hi! teachers and students!
My first work of Physics and Chemistry is of the matter.
The matter is a one part that separates for to analyze the substances that it contais.
•State of the matter:
- Solid.
- Liquid.
-Gaseous.
•The aspect of matter:
-Heterogeneus: is this that don't represent one aspect uniform.
-Homogeneus: is this that represent one aspect uniform.
•Simple substances and compounds:
-Substance simple is one substance pure that is formed for only type of element.
-Compounds is one substance pure formed for two or more combined elements.
Tuesday, 13 November 2007
Wednesday, 7 November 2007
Molecular level
- organic: present especially in the alive matter. The organic macromolecules are: glícidos, lípidos, proteins and nucleicosacids .
- inorganic: presents in the alive matter and in the inert one. They are the water and you them work out mineral.
Tuesday, 6 November 2007
The class of Biology
My topic of this month is on the class of Biology.
The class is very cheerful but the subjet is difficult.
In class we study the cells , the organ sistem and the funcion(s) of this.
After we go to study the nourishment humanizes.
The class of Biology is bilingual. We speak in english but what we don't understand... we ask.
Now we are study the organ system:
- muscular.
- skeletal.
- nervous.
- endocrine.
- locomotor/muscoloskeletal.
- digestive.
- respiratory.
- urinary/excretory.
- circulatory.
- reproductive.
Sunday, 4 November 2007
Saturday, 3 November 2007
The cell: his parts and his functions
-CELL MEMBRANE: It allows the communication between the cell and his environment. It´s principal functions are: To protect the cell, to regulate the traffic of substances from the exterior and towards the interior of the cell.
-CYTOPLASM: It places between the plasmatic membrane and the nucleus. In it they find the nutrients that managed to cross the plasmatic membrane to come to the organells of the cell.
-CITOESQUELETON: He contributes to the integrity of the cell defining his form and distribution. It plays a role very importantly both in the cellular division and in the transport between cells.
-NUCLEUS: It controle the cellular physiology, the nucleus has ovoid or rounded form. It contains the DNA or genetic code.
-RIBOSOMES: Their function is to create proteins from the information that comes to him from the DNA.
-GOLGI APPARATUS: It is shaped by a set of bladders. It´s function is to store temporarily the proteins and to intervene in the processes secretores of the cell.
-MITOCHONDRIA: they never remain static; they moving across, changing form and being fused by other mitochondria. Their principal function is to provide energy to him.
-CENTRIOLO: To the set two these it is named diplosoma, and plays an important role in the cellular division (mitosis)
Thursday, 1 November 2007
Wednesday, 31 October 2007
-ASTRONOMY:the study of the universe and the planets.
-CHEMISTRY:the science dealing with the composition of substances.
Many of the earth sciences, including:
-GEOLOGY:It is the science that studies the land.
-HYDROLOGY:He studies the movement and the distribution of the water in the Earth.
-METEOROLOGY: The study of Earth's weather patterns and other atmospheric phenomena.
-OCEANOGRAPHY:the study of the ocean.
-SOIL SCIENCE:the study of the pedosphere.
LINK:
http://en.wikipedia.org/wiki/Physical_science
Nobel Prize on Physics 2007
The Frenchman Albert Fert and the German Peter Grünberg, Nobel prize of Physics for his discovery of the magneto - resistance Stockholm.The Frenchman Albert Fert and the German Peter Grünberg are the winners of the Nobel Prize on Physics 2007 for his discovery of the magneto - resistance, which has served to extract information of the hard disks of the computers, he communicated today the Royal(Real) Academy of Sciences of Sweden. The Nobel prize of Physics is endowed with 10 millions of co [Attention! Seul le début de votre texte a été traduit.] What´s this??
http://nobelprize.org/nobel_prizes/physics/laureates/2007/
The greenhouse effect
The atmosphere is formed by steam of water and carbon dioxide, between other gases which are transparent to the radiaton of the Sun.Nevertheless, when this radiation is emitted of return from the soil towards the exterior in the shape of heat, it is reflected partly again towards the Earth by these gases.The atmosphere behaves as a crystal, which supports the heat in his interior and helps to stabilize during millionyears the everage temperature of the planet (15ºC). If the greenhouse effect didn´t exist, the temperature of the Earth to fall some 30ºC.
SILVER
The silver is a chemical element of atomic number 47 placed in the group 1b of the periodic table of the elements. His symbol is Ag. It is a metal of transition white, brilliant, soft, malleable and it is the best metallic driver of the heat and the electricity.
It is in the nature forming part of different minerals (usually in form of sulphide) or as free silver. It is very scanty in the nature of that represents one part in 10 millions of terrestrial bark. The most part of your production it is obtained as by-product of the treatment of the mines of cooper, zinc, plumb and gold. The metallurgy from his it minerals it is relized fundamentally by the cianuration.
biology and geology
The
biology is the science that he studies the alive(vivacious) beings. The alive(vivacious) beings estan formed(trained) for: the atoms (though these estan formed by electrons, neutrons and protons), the cells, the tissues, the organs and the organisms(organisations).The geology is the sciensie that he studies the rocks
Tuesday, 30 October 2007
DNA
The DNA is inside the nucleus of the cells of the organisms.The deoxyribonucleic acid is the primary component of the chromosomes and the material of which the genes are formed, essential to transmit the vital information of all the alive beings.
The DNA was discovered by Francis Crick, Maurice Wilkins and James Watson.These three scientists were rewarded by his discovery with the Nobel Prize on Medicine or Physiology in 1962.
Sunday, 28 October 2007
A very organic lesson
We already know that when cells work together to perform a particular job they form a tissue. Well, when two or more tissues associate to perform some function, we have an organ, and when different organs work together they form a system. Your task today is to get familiar with the different organs and systems of the human body. You may start by writing the name of the main organ systems on the worksheets I've handed out to you. Then look for information about their function and their main organs by clicking on the following links:
http://vilenski.org/science/humanbody/hb_intro.html
http://www.bbc.co.uk/science/humanbody/
http://warriors.warren.k12.il.us/dburke/bodyindex.htm
http://kidshealth.org/kid/
You may also try to solve some of the riddles in the previous entry...
Thursday, 18 October 2007
Some Biology topics to write about...
- Humans are just one of the millions of living beings on Earth. Do you know what do all living things have in common? How can we classify them?
- Perhaps you remember we left an unresolved question in one of our lessons: Which is the largest organ in the human body? Why not investigate the answer and tell us about it? Has it surprised you?
- Still about size: Which is the largest and the smallest cell in the human body?
- Is there any difference between animal and plant cells? (I can advance the answer to you: YES, THERE IS! Investigate about it)
- The English scientist Robert Hooke was the first person who observed cells under the microscope, and he invented the word "cell". Find out about his life and career.
Of course these are only hints in case you need them. Any other topic you choose will be fine.
Tuesday, 16 October 2007
Chat in the blog!!!XD
- Hello Patry!! What do you think about the Bilingual Section?
- Hi, Andrea!!! The Bilingual Section is very difficult.
- What is the most difficult? Biology or Physics.
- Is much more difficult Physics, because I don’t understand.
- Ok. I like much the Biology, because I like nature and the human body.
- Good bye Andrea!!
- Good bye!!
I thought that this was is very difficult; but now I think it is much easy.
Thought my pronunciation is very bad I can understand well. The exercises was difficult but now the exercises is easy.
http://www.biology4kids.com/files/cell main.html
My first impressions on the bilingual section
I thought that this was very difficult. But now, I think what is more easy. Sometimes, I don’t understand everything my teacher says, but I learn new words every day. My teachers speak to me in English and I answer in English too. The exercises are in English and this is sometimes hard. I writing the truth, I don’t like science and I don’t like biology. But I hope that this experience makes me change my opinion.
[ ..TaniuSkinha..*
Thursday, 4 October 2007
Let´s get started
Here is a group of 15 students of 3ºESO at the IES Fernando Esquío in Neda (A Coruña,Spain) who are being taught Biology and Physics following CLIL, that is to say, using English to do so. They are lucky to have science teachers who are willing and able to start this adventure, and this blog will try to be the screen where they can project their findings, their questions, their creations...
To start with, click for a beautiful exhibition on Art and Science
And remember Leonardo da Vinci