Weegy: Low. User: When two oceanic plates collide, it creates a Weegy: They are powered by forces originating in Earth?s radioactive, solid iron inner core. They move in different directions atop a layer of much hotter, softer, more malleable rock called the athenosphere User: The Mid-Atlantic Ocean Ridge is an example of a (More)

Weegy: The Mid-Atlantic Ridge is an example of what is called a slow-spreading mid-oceanic ridge system, which typically is broad with a deep, central rift valley. [ [ (Fast-spreading systems are more typical of the Pacific Ocean, where deep trenches are more common than in the Atlantic.) New seabed is continually being formed from the spreading ridge, which creates relatively shallow areas in the middle of the Atlantic above the extremely flat abyssal plains that begin at the margins of the continental shelves. ] ] (More)

Weegy: Volcanoes are formed by the accumulation of magma (molten rock that forms below a planet's surface). Magma can erupt through volcanic vents. As magma forms, it rises and accumulates in underground reservoirs before it erupts onto the surface. [ With each eruption, the erupted material adds another layer to the growing volcano. ] User: The seven continents used to be one huge supercontinent called Weegy: Pangaea (also spelled Pangea or Pang a) is a theoretical supercontinent that existed about 250 million years ago. Scientists believe all seven continents as they are today were once part of a supercontinent and have slowly moved apart. ] User: The seven continents used to be one huge supercontinent called Weegy: Pangaea (More)

Weegy: Magma (Plurals: magmas and magmata) is molten rock that sometimes forms beneath the surface of the earth (or any other terrestrial planet) that often collects in a magma chamber inside a volcano. Magma may contain suspended crystals and gas bubbles. [ [ [ By definition, all igneous rock is formed from magma. ] ] ] User: what is known as th new stone age? (More)

Weegy: could you please elobrate your question? User: Europe Asia Africa Middle East User: The era in which early humans made tools is called the _ Weegy: The first human remains were discovered in Herto, Ethiopia and are believed to be 160,000 years old. User: What species first appeared to walk upright? (More)