Answer:
Insects use air-filled tubes called tracheae to exchange oxygen and carbon dioxide between their tissues and the air. This network of tubes is also called a tracheal system. Insect body contains small openings on the outer surface called spiracles. Spiracles are connected to the internal tubes.
Hey there :)
This is so-called Faulting.
In our Earth, we have sections of the crust. When the sections move relative to each other, faulting occurs.
Earthquake
- has hypocenters and epicenters
- may be preceded by ground deformation
- measured by magnitude and intensity scales
- most frequent in alaska and volcanoes
Volcanoes
- cannot be predicted accurately
- measured by an explositivity index
- cause a visible fume or steam cloud or both
- often cause steam or gas to erupt in the atmosphere
- caused by molten rock erupting through earth’s surface
In a solar system, there is a sun that is in the middle and has planets orbiting around it. The same way, the nucleus is in the middle with electrons orbiting the nucleus. <span />
I believe it is the retina that changes shape to focus on distant objects.
