Answer:
Una vibración se puede caracterizar por su frecuencia y su intensidad. La frecuencia es el número de veces que se completa un ciclo de oscilación y se mide en hercios (Hz). Un hercio equivale a un ciclo por segundo.
Explanation:
Answer:
Atmosphere layers. Earth's atmosphere is divided into five main layers: the exosphere, the thermosphere, the mesosphere, the stratosphere and the troposphere. The atmosphere thins out in each higher layer until the gases dissipate in space.
Explanation:
The atmosphere has 4 layers: the troposphere that we live in near the surface of the earth; the stratosphere that houses the ozone layer; the mesosphere, a colder and lower density layer with about 0.1% of the atmosphere; and the thermosphere, the top layer, where the air is hot but very thin.
Answer:
a blood protein
Explanation:
a blood protein produced in response to and counteracting a specific antigen. Antibodies combine chemically with substances which the body recognizes as alien, such as bacteria, viruses, and foreign substances in the blood.
I think it would be crust
Answer: D.
Explanation: There are more prey than there are predators.
