Quick Answer: Which Types Of Evidence Do Geologists Usually Study?

What is the coldest layer?

mesosphereAnswer and Explanation: The coldest layer of the atmosphere is known as the mesosphere.

The mesosphere is the third layer up from the Earth’s surface right above the….

What are two things that geologists study about Earth?

Geologists study the chemical and physical characteristics of rock, the material that forms Earth’s hard surface. They map where different types of rock are found on and beneath the surface. Geologists describe landforms, the features formed in rock and soil by water, wind, and waves.

How do geologists know the internal structure?

Most of what we know about the interior of the Earth comes from the study of seismic waves from earthquakes. Seismic waves from large earthquakes pass throughout the Earth. These waves contain vital information about the internal structure of the Earth.

Which layer of Earth is the thinnest?

crustThe Earth can be divided into four main layers: the solid crust on the outside, the mantle, the outer core and the inner core. Out of them, the crust is the thinnest layer of the Earth, amounting for less than 1% of our planet’s volume.

How is Rift Valley formed?

A rift valley is a lowland region that forms where Earth’s tectonic plates move apart, or rift. Rift valleys are found both on land and at the bottom of the ocean, where they are created by the process of seafloor spreading. … Tectonic plates are huge, rocky slabs of Earth’s lithosphere—its crust and upper mantle.

Which location is on a major rift valley?

Very few active rift valleys are found on continental lithosphere. The East African Rift, the Baikal Rift Valley, the West Antarctic Rift, and the Rio Grande Rift are Earth’s major active continental rift valleys. The East African Rift is part of the “Great Rift Valley” system discussed below.

What are the 7 layers of earth?

If we subdivide the Earth based on rheology, we see the lithosphere, asthenosphere, mesosphere, outer core, and inner core. However, if we differentiate the layers based on chemical variations, we lump the layers into crust, mantle, outer core, and inner core.

Where is Earth’s crust the thinnest?

Scientists find thinnest piece of Earth’s skin. PROVIDENCE, R.I. — Scientists say they have discovered the thinnest portion of the Earth’s crust — a 1-mile thick, earthquake-prone spot under theAtlantic Ocean where the American and African continents connect.

Which statement best describes how the Great Rift Valley in Africa formed?

The answer is; The rift valley formed when the crust pulled apart. The rift valley formed at a divergent boundary.

What is Earth’s core made of?

The outer core is about 1,400 miles thick, and it’s made mostly of a combination (called an alloy) of iron and nickel, along with small amounts of other dense elements like gold, platinum, and uranium. These metals can, of course, be found on the surface of Earth in solid form.

Which feature of Earth is created at mid ocean ridges quizlet?

Sea-floor spreading occurs when the sea floor spreads apart along divergent boundaries and forms the mid-ocean ridge. Magma is pushed up through cracks in the crust along the mid-ocean ridge. As the magma is thrust up and hardens it forms new crust and the ocean floor on both sides of the mid-ocean ridge move outward.

What is the thickest interior layer of earth the thinnest?

mantleWhat is the thickest interior layer of Earth? The thinnest? The mantle is the thickest region at about 2900 km. The crust is the thinnest, ranging from about 6 to 70 km deep.

What are the 2 types of crust?

Earth’s crust is divided into two types: oceanic crust and continental crust. The transition zone between these two types of crust is sometimes called the Conrad discontinuity. Silicates (mostly compounds made of silicon and oxygen) are the most abundant rocks and minerals in both oceanic and continental crust.

Which steps do geologists use to find the epicenter of an earthquake quizlet?

How do geologists locate the epicenter of an earthquake? They use seismic waves to locate an earthquake’s epicenter. Scientists measure the difference between the arrival time of the P and S waves to the seismograph. The farther away an earthquake the greater the distance between arrival time.

How do geologists study direct evidence of Earth’s interior?

Geologists record the seismic waves and study how they travel through Earth. The speed of seismic waves and the paths they take reveal the structure of the planet. Using data from seismic waves, geologists have learned that Earth’s interior is made up of several layers.

Which evidence shows that landmasses had different climates millions of years ago and supports the theory of continental drift?

Answer Expert Verified. Scientists have found fossils on many different continents of species that would have lived in a climate very different from the one in that location today. For example, fossils of aquatic organisms have been found in deserts.

What countries are in the Great Rift Valley?

The Great Rift Valley is part of an intra-continental ridge system that runs through Kenya from north to south. It is part of the Gregory Rift, the eastern branch of the East African Rift, which starts in Tanzania to the south and continues northward into Ethiopia.

Which are evidence of seafloor spreading?

Several types of evidence supported Hess’s theory of sea-floor spreading: eruptions of molten material, magnetic stripes in the rock of the ocean floor, and the ages of the rocks themselves. This evidence led scientists to look again at Wegener’s hypothesis of continental drift.