storm cloud

Why are some clouds dark in appearance?

A cloud is a visible mass of water (tiny water droplets and/or ice crystals) suspended in the atmosphere at a considerable altitude. Clouds are usually white in appearance whereas others can appear grayish an...
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Is outer space a perfect vacuum?

Outer space (also called just space) is all the space in the universe beyond Earth and its atmosphere. It can be simple stated that in outer space there is no air (atmosphere) and it is a vacuum (empty ...
a star explosion

Is there sound in space?

This question may seems similar to a question already asked (Can you hear sound in space?) however, it is a very good question for the intellectually curious mind. So, is there sound in space? The answer is n...
a and an usage

When do you use “a” or “an” ?

The two indefinite articles a and an are used with singular nouns when the noun is general. They refer to nouns which are non-specific (i.e. not definite). In other words, they refer to a particular thing tha...
Filthy Rich

What is Social Darwinism?

Social Darwinism is a misguided social theory that attempts to adapt Charles Darwin natural selection principles and apply it to human society. This social theory, promotes a culture that embraces the concept...
United Nations logo

What is the Purpose of the United Nations?

The United Nations (UN) is an international organization dedicated in promoting world peace, collective security and friendly relations among most of the world’s nations. This, they aim to achieve through co-...
Mariana trench location

How deep is the Ocean?

The world's deepest point in the oceans is the Challenger Deep which is found within the Marianas Trench. The Marianas Trench is a depression (deep cracks) in the floor of the western Pacific Ocean. Marianas ...
Water molecule

Where does the oxygen come from that fish breathe?

Water is formed from the combination reaction of hydrogen gas (H2) and oxygen gas (O2) to produce liquid water (H2O). In other words, each molecule of water is made up of two hydrogen atoms and one oxygen ato...
tooth eruption

Why do children loose their baby teeth?

Children usually start loosing their baby teeth (primary teeth) anywhere between the age of 6 to 7 years where their jaws have grown to its mature size. The reason for this is that the jaw of a baby is too sm...

How do Astronauts communicate in space?

In order for one to hear sound it must travel through air (gas particles) of which space has very few per cubic centimeter. Sound can only travel through a solid, liquid or gas. Space being an almost perfect ...