This lesson is going to show how to use the Present Simple and Continuous tenses.
See some experiments that can be used to identify the components of organic compounds.
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.
Take a glimpse into the brutal world of ancient Roman gladiators.
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.
Why is the atomic nucleus considered to be positively charged and the electron cloud, negatively charged?
Improve your vocabulary and reading skills with this lesson about stars and celebrities.
Learn about Ignaz Semmelweis, a celebrated Hungarian physician of the 19th century, often referred to as 'the saviour of mothers'.
Learn about the characteristics and economic significance of methane as well as the sources and consequences of its emission.
In this lesson, you are going to learn how and why the passive voice is used in English.
