In strong light the pupil contracts, while in low light it dilates.
The Andes were formed by the collision of two tectonic plates, one oceanic and one continental.
We also utilize the degradable nature of sodium bicarbonate in our everyday kitchen life: it is the basis for baking powder.
Let’s find out how to use the Test Editor tool.
Natural gas and petroleum are among the most important sources of energy and raw materials today.
Let’s simulate protein digestion in the stomach using a mixture of hydrochloric acid and pepsin.
Art Nouveau did away with all the previous eclectic styles in architecture and paved the way for the modern architecture of the 20th century.
Nowadays it is perfectly natural to turn on the lights. But it has not always been that way.
The subtropics are located between the tropical and temperate zones, between 23.5° and 40° latitude in both hemispheres.
Let’s rotate a paper wheel with the heat of our hands.