How does the theory of plate tectonics explain the location of these fossils?
According to the theory of plate tectonics, the continents are not rigidly fixed to the surface of the Earth. In consequence, the map of the Earth’s surface is constantly changing over geological timescales. Some of the most persuasive evidence for this theory comes from the distribution of fossils.
How does the presence of similar fossils of ancient plants and animals in different continents indicate?
Continental drift was a theory that explained how continents shift position on Earth’s surface. Set forth in 1912 by Alfred Wegener, a geophysicist and meteorologist, continental drift also explained why look-alike animal and plant fossils, and similar rock formations, are found on different continents.
What does the theory of plate tectonics explain?
The theory of plate tectonics states that the Earth’s solid outer crust, the lithosphere, is separated into plates that move over the asthenosphere, the molten upper portion of the mantle. Oceanic and continental plates come together, spread apart, and interact at boundaries all over the planet.
How the theory of plate tectonics explains the movement of the continents and oceans?
The theory of plate tectonics is what brings together continental drift and seafloor spreading. Plates are made of lithosphere topped with oceanic and/or continental crust. The plates are moved around on Earth’s surface by seafloor spreading. The crust moves outward from the ridge over time.
How does the theory of plate tectonics help to explain the distribution of earthquakes?
As the plates grind along they build up potential energy along the fault, which is occasionally released in the form of vibrations. The distribution of transform boundaries around the world is a major predictor for the distribution of earthquakes worldwide.
What theory will you present to describe the movements of plates?
The theory of plate tectonics
The theory of plate tectonics revolutionized the earth sciences by explaining how the movement of geologic plates causes mountain building, volcanoes, and earthquakes.
What is the theory of plate tectonics combines which two other theories?
In fact, plate tectonics actually combine two other theories, continental drift and seafloor spreading into a comprehensive global theory. It’s curious that the continents on opposite sides of the Atlantic Ocean fit together so well, almost like a jigsaw puzzle.
What information do fossils provide about plants and animals?
Some animals and plant are only known to us as fossils. By studying the fossil record we can tell how long life has existed on Earth, and how different plants and animals are related to each other. Often we can work out how and where they lived, and use this information to find out about ancient environments.
How does plate tectonics explain the formation of mountain systems?
Mountains form where two continental plates collide. Since both plates have a similar thickness and weight, neither one will sink under the other. Instead, they crumple and fold until the rocks are forced up to form a mountain range. As the plates continue to collide, mountains will get taller and taller.
What is the theory of plate tectonics Class 9?
Plate tectonics is the theory that states that Earth’s outer shell is divided into several plates that glide over the mantle. The plates act like a hard and rigid shell compared to Earth’s mantle. This strong outer layer is called the lithosphere. Plate tectonics is the modern version of continental drift.
How does the theory of plate tectonics explain the location of earthquakes and volcanoes Where do most earthquakes and volcanoes occur?
Plates are thought to float on the partially molten mantle, moving away from oceanic ridges where new plate material is produced and moving past each other or colliding along plate boundaries. Earthquakes and volcanoes are related to this movement.