1290 questions and answers in this section
Explain why abyssal fish have sharp teeth?

Explain why abyssal fish have sharp teeth?

Deep-sea fish live in a place where food is scarce. As a result, they must maximize every meal, no matter how tiny. Their sharp teeth...

Read full answer

Explain why raindrops are not all the same size?

Explain why raindrops are not all the same size?

In the cloud, the small water droplets spend their time bumping into each other. Sometimes, they merge to form larger drops: this is coalescence. The...

Read full answer

Explain why ozone is important in the stratosphere?

Explain why ozone is important in the stratosphere?

Ozone, present in the stratosphere (a layer located at about 15 to 35 kilometers altitude), acts somewhat like a giant sunscreen for our planet: it...

Read full answer

Can you explain why some minerals shine under ultraviolet light?

Can you explain why some minerals shine under ultraviolet light?

When certain minerals are illuminated with ultraviolet (UV) light, some electrons inside receive a significant boost of energy. As a result, they get temporarily projected...

Read full answer

Explain why is snow white and not transparent?

Explain why is snow white and not transparent?

When light hits the snow, it doesn't pass directly through the crystals. It bounces multiple times in all directions, moving from one crystal to another. This is...

Read full answer

Can you explain why some mountains contain rose quartz crystals?

Can you explain why some mountains contain rose quartz crystals?

Rose quartz comes from the underground crystallization of silica-rich magma. When this hot magma cools underground, it slowly forms crystals. The cavities or deep cracks...

Read full answer

Explain why desert plants are often thorny?

Explain why desert plants are often thorny?

The desert is a seriously tough place for plants: intense heat, nearly constant lack of water. To survive, plants have developed clever tricks like turning...

Read full answer

Explain why waves do not propagate in the same way everywhere in the ocean?

Explain why waves do not propagate in the same way everywhere in the ocean?

Storms, with their powerful winds and sudden changes in atmospheric pressure, generate higher and more energetic waves. When these weather disturbances occur at sea, the...

Read full answer

Explain why a balloon deflates when it is pierced?

Explain why a balloon deflates when it is pierced?

A inflated balloon has an internal pressure greater than the external pressure. This is because the air inside pushes against the walls in all directions, putting them...

Read full answer

Explain why gemstones have such vivid colors.

Explain why gemstones have such vivid colors.

When light passes through a gemstone, it encounters regularly arranged internal structures that are very precisely organized: the famous crystals. This organization acts somewhat like...

Read full answer