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This lesson is going to show how to use the Present Simple and Continuous tenses.
Silver is the most widely produced and used precious metal and a good electrical conductor.
In this lesson, you will learn about globalisation.
See some experiments that can be used to identify the components of organic compounds.
Learn how a market economy works.
Due to their special properties, carbon atoms can combine in unlimited numbers and form the base of organic compounds.
Euler is one of the most outstanding figures in the history of science.
Euler is one of the most outstanding figures in the history of science.
In this lesson, you are going to learn how to write a formal letter of complaint.
Improve your listening and vocabulary skills with this lesson about job interviews.
Learn about the radioactive decay law and its fields of use.
Aprendam acerca do cancro, a segunda maior causa de morte do mundo.
Fiquem a conhecer o mundo brutal dos gladiadores da Roma antiga.
In this lesson, you are going to learn essential sports vocabulary and practise the modal auxiliary verb can.
Organic substances can be grouped by various criteria, which helps to identify and get to know these substances.
In this lesson, you are going to learn about the four seasons of the year and the fun things to do in them.
Por que é que se considera que os núcleos atómicos têm carga positiva e que a nuvem eletrónica tem carga negativa?
Improve your vocabulary and reading skills with this lesson about stars and celebrities.
Aprendam acerca de Ignaz Semmelweis, um célebre médico húngaro do século XIX, muitas vezes apelidado de "salvador das mães".
Aprendam acerca das características e importância económica do metano, e também acerca das fontes e consequências da sua emissão.
In this lesson, we are going to learn how to express possession.
In this lesson, you are going to learn how and why the passive voice is used in English.
Let’s revise the Past Simple and Past Continuous.
In this lesson, you are going to learn how to describe physical appearance.