Diamonds (is, are) made of pure carbon.

Diamond (come, comes) from a Greek word meaning “indestructible.”

Carbon (are, is) an extremely hard mineral.

Many cultures (view, views) diamonds as a symbol of romance.

An enormous diamond (were, was) discovered in Africa in 2008.

That huge gem (weigh, weighs) in at 478 carats.

The diamond’s beautiful color (impress, impresses) many experts.

The 3,106 carat Cullinan Diamond (was, were) discovered in 1905.

The article (shows, show) an amazing photo of the Cullinan Diamond.

Your skin (are, is) made up of two main layers.

It (protect, protects) the layer beneath, called the dermis.

An adult’s skin (covers, cover) an area of about two square yards.

Every day a person (lose, loses) millions of dead skin cells.

Of course, your body (do, does) not simply wear away.

New skin cells (is, are) being made constantly.

People (encounter, encounters) the most wear and tear on the bottoms of their feet.

People’s skin (help, helps) keep body temperature steady.

In hot temperatures, the human body (cools, cool) itself by sweating.

People depends on their taste buds to detect the flavor of food.

Most adults has thousands of taste buds on their tongues.

Some taste buds is also located on the roof of the mouth.

Scientists divide taste buds into four types.

Your taste is also dependent on your sense of smell.

Cold foods makes taste buds less sensitive.

A person taste sour flavors along the sides of the tongue.

Most foods are a combination of those four main tastes.