1315 questions and answers in this section
Explain why lakes can change color depending on the season?

Explain why lakes can change color depending on the season?

The color of a lake mainly depends on the elements present in its water and how it reflects light. Pure water absorbs red and lets...

Read full answer

Explain why do pebbles become round at the bottom of rivers?

Explain why do pebbles become round at the bottom of rivers?

Stones gradually become round due to the action of erosion, a natural phenomenon that wears down and transforms rocks over time. Essentially, several forces come...

Read full answer

Explain why do birds migrate at such high altitudes?

Explain why do birds migrate at such high altitudes?

Migratory birds generally seek heights where atmospheric conditions become favorable for them. At several hundred or even thousands of meters above the ground, they take...

Read full answer

Explain why do brick walls tend to crumble over time?

Explain why do brick walls tend to crumble over time?

Bricks are often made from a mixture of clay and water, shaped and then fired at high temperatures. During firing, it becomes hard and solid: this is...

Read full answer

Explain why do catfish have whiskers?

Explain why do catfish have whiskers?

These funny whiskers, also known as barbels, are actually highly specialized sensory organs in catfish. They are equipped with thousands of small nerve cells that...

Read full answer

Explain why do the bacteria in our intestines influence our mood?

Explain why do the bacteria in our intestines influence our mood?

Our intestines communicate directly with our brain through an axis called the gut-brain axis. The gut microbiota, consisting of billions of bacteria in our digestive...

Read full answer

Explain why do pineapples not continue to ripen once they are picked?

Explain why do pineapples not continue to ripen once they are picked?

The pineapple is quite unique when it comes to ripening: unlike other fruits, it stops completely after being harvested. While it grows quietly on its...

Read full answer

Explain why do cactus flowers often bloom at night?

Explain why do cactus flowers often bloom at night?

In desert environments, extreme daytime temperatures can cause significant evaporation. At night, the cooler air and higher humidity reduce water loss. Cacti primarily bloom at...

Read full answer

Explain why are fingerprints unique to each individual?

Explain why are fingerprints unique to each individual?

During the first weeks of pregnancy, the baby's skin begins to form folds and bumps called papillary ridges. By the third or fourth month, these...

Read full answer

Explain why does Mexico City (Mexico) sink every year?

Explain why does Mexico City (Mexico) sink every year?

Mexico City is situated in a basin surrounded by mountains, and originally, there was a series of shallow lakes. Over the millennia, these lakes filled...

Read full answer