jueves, 28 de abril de 2011


 These sites contain math games, logic puzzles, magic squares and math videos for students who need a fun way to practice math facts.

In this website we can explore the universe through Hubble’s eye and see the most spectacular images of the cosmos.

fractal is "a rough or fragmented geometric shape that can be split into parts, each of which is (at least approximately) a reduced-size copy of the whole, a property called self-similarity. A collection of fractals in this nice site.

martes, 26 de abril de 2011

1º - 3º ESO Introduction to Electricity

1º - 3º ESO The History of Electricity

A short video about the history of Electricity, is a good resource for teachers besides is useful too for students.

God of the sea, protector of all waters. Poseidon is the brother of Zeus. After the overthow of their Father Cronus he drew lots with Zeus and Hades, another brother, for shares of the world. His prize was to become lord of the sea. He was widely worshiped by seamen. He married Amphitrite, a granddaughter of the Titan Oceanus.


You have here an interesting video about a big structure: "Oresund´ bridge"

If you want to see more you can visit "YouTube" and looking for "Megastructures".


Read and traslate

I love

I love to see you smile
and I love knowing that
I caused that smile.

I love see you happy
and I love knowing that
I caused that happiness.

I love to look into your beautiful eyes
and I love the way I fall into them.

I love it when you hold my hand
and I love having
the courage to grab and hold yours.

I love that I want to be yours
I love so many things about you
but the most important thing is…



Read the follwing definitions of vocabulary associated with Economics. Then try to find the Spanish word:

Wage freeze - Attempt by a government to restrain wage-push inflation by holding wages at their existing level by force of law.

Wage-price spiral - Alternative term for inflationary spiral.  Self-sustaining upwardtrend in general price levels fueled by the reinforcing feedback of a vicious circle. Wage price spiral is a typical example of an inflationary spiral: high cost of living prompts demands for higher wages which push production costs up forcing firms to increases prices, which in turntrigger calls for fresh wage increases ... and so on. Such situations continue until radical measures (such as incomes policy) are instituted to break the cycle, otherwise the currency is rendered almost worthless as a medium of exchange (as it happened in Germany in the 1920s, in Brazil in the 1980s, and in Argentina in the 1990s) and has to be replaced with new monetary units (currency)).

Working life - Alternative term for pot life (Period for which two mutually reactive chemicals remain usable when mixed).

Writeoff - Removal of the book value of a destroyed or obsoleteasset, or an uncollectiblesum, from the account books by reducing it to zero. The amount written off is charged against the earnings as an expense or loss.

Write down - Downward revision of the book value of an asset to reflect its current market value that has dropped below the book value. The amount by which the book value is reduced is charged against the earnings as an expense or loss.

Work sharing - Method used for reducing operating costs without layingoffemployees. In work sharing schemes, workinghours and wages are cutacross the board until the organization's finances return to normal levels.

Work to rule - Industrial action where, in contrast to a strike, workers do not withdraw their labor. Instead, they stayon their jobs but drastically slowdown the operations by punctilious adherence to a narrow interpretation of work rules included in the collective bargaining agreement.

Welfare - Availability of resources and presence of conditions required for reasonably comfortable, healthy, and secure living.

Welfare economics - Cost-benefit analysis of the allocation of resources, economic activity, and distribution of the resulting output on a society'swelfare. See also welfare state.

Welfare state- Political system based on the premise that the government (and not the individual, corporations, or the local community) has the responsibility for the well being of its citizens, by ensuring that a minimum standard of living is within everyone's reach. This commitment is translated into provision of universal and freeeducation, universal medical care, insurance against disability, sickness, and unemployment, family allowances for income supplement, and old age pensions.

Wealht - Total of all assets of an economicunit that generate current income or have the potential to generate future income. It includes natural resources and human capital but generally excludesmoney and securities because therepresent only claims to wealth.

Wholesaler - Person or firm that buys large quantity of goods from various producers or vendors, warehouses them, and resells to retailers. Wholesalers who carry only non-competing goods or lines are called distributors.

Wholesale price - The cost of a goodsold by a wholesaler. The wholesaler will usually charge a price somewhat higher than he or she paid to the producer, and the retailer who purchases the goods from the wholesaler will increase the price again when they sell the good in their store.

Wage - Monetaryremuneration computed on hourly, daily, weekly, or piece work basis. A fixed weekly or monthly wage is usually called a salary.

Yield differential - Differences in the yields of different securities, commonly used to compare bonds with different maturities and credit ratings. As a general rule, bonds with longer maturities and lower credit ratings generate larger yields, and bonds with shorter maturities and lower high credit ratings generate smaller yields.

Yield - Annual income earned from an investment, expressed usually as a percentage of the money invested.


Read the follwing definitions of vocabulary associated with Economics. Then try to find the Spanish word: .

Unearned increment - An increase in the value of land or property without labour or expenditure on the part of the owner

Uneconomic - Describes processes or activities that are wasteful and likely to result in a loss of money

Unemployed - Person of employment age (generally 16 to 65 years) who does not have a payingjob but is available for work and is actively seeking a job.

Unemployment- Totalnumber of ablemen and women of working age seeking paidwork.

Useful life - Period during which an asset or property is expected to be usable for the purpose it was acquired. It may or may not correspond with the item'sactualphysical life or economic life.

Usury - The activity of lending someone money with the agreement that they will pay back a very much larger amount of money later.

Utility - Pleasure or satisfaction (value for money) derived by a person from the consumption of a good or service or from being in a particular place, and for the maximization of which all economicactions are motivated. It is the subjective or psychic return which cannot be measured in absolute or objectiveterms. Goods or services that have utility for one person may not have for another, and what may have utility for a person at a certain time or place may not have it at another.

Vendor - Someone who is selling something.


Read the follwing definitions of vocabulary associated with Economics. Then try to find the Spanish word:

Salary - A fixed amount of money agreed every year as pay for an employee, usually paid directly into his or her bank account every month.

Sale - An act of exchanging something for money.

Savings - The money which you keep in an account in a bank or similar financial organization.

Stock exchange - A place where parts of the ownership of companies are bought and sold, or theorganization of people whose job is to do this buying or selling.

Strike - To refuse to continue working because of an argument with an employer about working conditions, pay levels or job losses.

Supply - Totalamount of a product (good or service) available for purchase at any specified price. It is determined by: (1) Price: producers will try to obtain the highest possible price whereas the buyers will try to pay the lowest possible price both settling at the equilibrium price where supply equalsdemand. (2) Cost of inputs: lower the input price the higher the profit at a price level and more product will be offered at that price. (3) Price of other goods: lower prices of competing goods will reduce the price and the supplier may switch to switch to more profitableproducts thus reducing the supply.

Supply curve- Graph curve that normally slopes upward to the right of the chart (except in case of regressive supply curve), showing quantity of a product (good or service) supplied at different pricelevels. Customarily, the price is plotted on vertical ('Y') axis and quantity on the horizontal ('X') axis, and it is assumed that (in the short run) the price of the inputs and productivity of the production process remains unchanged. Supply curves of the individualproducts are aggregated to give a market supply curve and, when drawn together with the demand curves, show the equilibrium price at the intersection of the two curves.

Tax - An amount of money paid to the government, which is based on your income or the cost of goods or services you have bought.

Technology- Purposeful application of information in the design, production, and utilization of goods and services, and in the organization of human activities.

Trade- Commercial transaction involving the sale and purchase of a good, service, or information.

The Treasury - The government department, in Britain and various other countries, which is responsible for financial matters such as spending and tax

Trust - A monopolistic corporation, prior to the enactment of antitrust laws.