Solar radiation, because it hasn't (at least noticeably) affected hawks.
Seafloor spreading occurs at divergent plate boundaries. As tectonic plates slowly move away from each other, heat from the mantle's convection currents makes the crust more plastic and less dense. The less-dense material rises, often forming a mountain or elevated area of the seafloor.
Answer:
B: The shorter and more rounded the Appalachian Mountains are more than four times older than the taller and more jagged Rocky Mountains
Explanation:
- The Appalachian mountains form a system of mountains in eastern North America and are older than rocky mountains as they were formed 480 million years ago and are similar to those of the alps. They form a barrier to the east to the west.
- They extend to southeast Canada and form zones of 300 miles wide. They form the mountain ranges surrounding hills and the dissected plateaus forming at an elevation of 6,684 meters from the sea level. <u>Whereas the rocky mountains are younger and have an elevation of 4,401 meters.</u>
Coniferous trees dominate Boreal forests rather than tundra because of the lack of permanently frozen soil.
a lack of permanently frozen soil.
<u>Explanation:</u>
Boreal forests are characterized by a cold but not so cold weather. This means that it is too cold for the growth of deciduous trees. When it comes to the growth of tundra, the weather isn’t cold enough for the growth of tundra.
Tundra requires permafrost which is a permanently frozen layer of ground . The Boreal forests lack permafrost and thus isn’t suitable for the growth of tundra vegetation.
B, burrowing action of earthworm
