Answer:
The earth’s crust is broken into separate pieces called tectonic plates (Fig. 7.14). Recall that the crust is the solid, rocky, outer shell of the planet. It is composed of two distinctly different types of material: the less-dense continental crust and the more-dense oceanic crust. Both types of crust rest atop solid, upper mantle material. The upper mantle, in turn, floats on a denser layer of lower mantle that is much like thick molten tar.
Each tectonic plate is free-floating and can move independently. Earthquakes and volcanoes are the direct result of the movement of tectonic plates at fault lines. The term fault is used to describe the boundary between tectonic plates. Most of the earthquakes and volcanoes around the Pacific ocean basin—a pattern known as the “ring of fire”—are due to the movement of tectonic plates in this region. Other observable results of short-term plate movement include the gradual widening of the Great Rift lakes in eastern Africa and the rising of the Himalayan Mountain range. The motion of plates can be described in four general patterns:
<p><strong>Fig 7.15.</strong> Diagram of the motion of plates</p>
Collision: when two continental plates are shoved together
Subduction: when one plate plunges beneath another (Fig. 7.15)
Spreading: when two plates are pushed apart (Fig. 7.15)
Transform faulting: when two plates slide past each othe
Explanation:
Answer:
A. long (front-to-back), vertically low skull shape
Explanation:
- The Neanderthals had a different body structure than doe the present modern humans have. The had a more robust well-built structure and had a distinctive morphological feature.
- Research suggests they were stronger than modern man thought they were slightly shorter than modern humans. They had a noticeable face, a chin, and a forehead slope.
It is scientifically known as Hidrologic Cycle
Answer:
Diffusion is the movment of particles from an area of high concentration to a low concentration down a concentration gradient
A more stringent definition is agamogenesis which is reproduction without the fusion of gametes<span>. Asexual reproduction is the primary form of reproduction for single-celled organisms such as the </span>archaebacteria<span>, eubacteria, and protists. Many plants and fungi reproduce asexually as well.</span>
