1290 questions and answers in this section
Explain why some flowers are edible while others are toxic to humans?

Explain why some flowers are edible while others are toxic to humans?

Flowers contain various chemical substances that determine whether they are safe to consume or not. Some contain compounds like alkaloids, digitalin, or solanine, which often...

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Explain why do strawberries have seeds on their surface?

Explain why do strawberries have seeds on their surface?

The strawberry is not technically a true fruit but a false fruit, as it is a fleshy part that arises from the swelling of the...

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Explain why do shooting stars shine in the night sky?

Explain why do shooting stars shine in the night sky?

Shooting stars are actually tiny rocky or metallic particles called meteoroids. They wander in space, usually coming from comets or asteroids, from which they break...

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Explain why air quality in the mountains can impact the performance of athletes at high altitudes?

Explain why air quality in the mountains can impact the performance of athletes at high altitudes?

At high altitudes, the air becomes less dense, which simply means there are fewer oxygen molecules available with each breath. As a result, the lungs...

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Explain why some beaches are formed of crushed shells.

Explain why some beaches are formed of crushed shells.

Beaches made of crushed shells primarily come from marine organisms. Mollusks, crustaceans, and other shelled animals produce solid calcareous shells throughout their lives from minerals...

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Explain why airplanes fly instead of falling?

Explain why airplanes fly instead of falling?

When an airplane moves forward, its wings guide the airflow around them. Thanks to their slightly curved shape on top and flatter underneath (called aerodynamic...

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Explain why the sky is blue?

Explain why the sky is blue?

When the sunlight passes through our atmosphere, it encounters air molecules and small suspended particles. These tiny elements scatter the light rays in different directions: this is...

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Explain why do ants carry leaves bigger than themselves?

Explain why do ants carry leaves bigger than themselves?

Leafcutter ants often carry fragments much larger than themselves, sometimes up to 50 times their own weight. Why this seemingly exhausting choice? In reality, hauling...

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Explain why the deep sea abysses are so poorly explored?

Explain why the deep sea abysses are so poorly explored?

Under several kilometers of water, the pressure is so powerful that it sometimes amounts to several hundred times that felt at the surface. At these...

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Explain why some countries celebrate New Year at different dates?

Explain why some countries celebrate New Year at different dates?

Around the world, each civilization has developed its own calendar based on practical needs, religious beliefs, and astronomical observations. For example, the ancient Egyptians relied...

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