Category - Science


What is a vacuum?

Avacuum is a space that has less gaseous pressure than the standard atmospheric pressure at sea level on Earth. A partial vacuum can be easily created by...


Why do we sweat?

Sweat is produced by dedicated sweat glands, and is a mechanism used primarily by the body to reduce its internal temperature. There are two types of sweat...


How do glow sticks glow?

Inside a glow stick is a thin glass vial containing chemicals. When you bend the stick you’re breaking this vial open, releasing the chemicals into the rest of...


Why do we sneeze?

When we breathe in, the inhaled air can contain dust, chemicals and other irritants that can be harmful to the body, particularly to organs in the respiratory...


What is gas?

Along with liquids and solids, gases are one of the three major states of matter. Typically they result when a substance is heated in its liquid state to its...