2: ¿Por qué no podemos ver en la oscuridad? 3: ¿Qué nos hace bostezar? 4: ¿Por qué tenemos hipo? 5: ¿Por qué el agua de mar es salada?
Respuestas
Respuesta:
2.Although darkness as the total absence of light perceived or visible to humans is relatively easy to achieve, pure or total darkness from a scientific point of view does not exist, because the scientific definition of light includes not only light from the visible spectrum , but the whole spectrum ...
3°Yawning is a powerful non-verbal message with several possible meanings, depending on the circumstances: It can be an indicator of tiredness, stress, overwork, or boredom. Also, rarely because of hunger
4°Hiccups occur when the diaphragm (muscle that separates the chest from the abdomen and plays an important role in breathing) involuntarily contracts. This involuntary contraction causes the vocal cords to suddenly close, producing the characteristic hiccup sound.
5° Ocean salt comes from rocks on land. Here's how it originates: The rain that falls on the ground contains dissolved carbon dioxide found in the air. ... Incidentally, the concentration of salt in the oceans (salinity) is about 35 parts per thousand.