A chemistry teacher has a lesson and first wants to find out the students’ prior knowledge of volume and weight measurements. He begins by explaining that in chemistry labs, students must be able to mix different liquids in exact proportions. He therefore asks if anyone can say how much a litre is. That’s as much […]
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There are seven continents on Earth. That’s the short answer. However, not everyone agrees on this. In this article, we explain what exactly a continent is and why there is so much disagreement about the number of continents our world has. What is a continent? The word continent is used to distinguish between several large […]
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Heartburn, also called gastric juice reflux, feels like a burning sensation behind the breastbone or in the throat. It can also include acid reflux. In the vast majority of cases, heartburn is completely uncommon, but it can be helpful to understand why it happens. Heartburn occurs when gastric juices come up from the stomach into […]
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Have you ever wondered which is the richest country in the world? When measuring how rich a country is, GDP per capita or purchasing power parity (PPP) is used to get a more accurate result of how rich a country is. Read on now to discover which are the richest countries in terms of GDP […]
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