When sound waves hit a solid surface they either reflect, refract, or absorb.
Echo's are caused by the reflection of sound waves.
The volcanoes may be dormant or not as active. Only very active volcanoes will be known for erupting a lot.
Answer:
The next two major events that take place in mitosis are the alignment of chromosomes at the center of the cell and the subsequent separation of sister chromatids to opposite mitotic spindle poles. These two events occur in metaphase and anaphase, respectively.
Explanation:
A measurement of population per unit area
For example x amount of people in 1000 square feet
