Which of the following statements concerning our knowledge of the earths interior is false

Q: Where does most of our knowledge about Earths interior comes from?

Most of our knowledge of Earths interior comes from the study of earthquake waves.

Q: What provides us information about the interior of the Earth?

Seismic waves tell us that the Earths interior consists of a series of concentric shells, with a thin outer crust, a mantle, a liquid outer core, and a solid inner core. P waves, meaning primary waves, travel fastest and thus arrive first at seismic stations. The S, or secondary, waves arrive after the P waves.

The statement that best explains why S waves are not found at angles greater than 103 degrees from its origination is:

Índice Show

Inside the Earth
River of Rock
Which of the following things are not used to learn about the interior of the Earth?
Where does most of our knowledge about Earth's interior comes from?
What provides us information about the interior of the Earth?
How do we know about the interior of the Earth quizlet?

When seismic waves travel through the interior of the Earth and the contrast from moving from a less dense layer to a much higher density rock, the direction of the wave may _____.

When seismic waves travel through the interior of the Earth and the contrast is less severe when moving through different densities, the direction of the wave may _____.

A type of body wave that travels through Earth's interior in a back and forth (compressional) motion is called:

A type of body wave that can travel through both solids and liquids is called:

Waves that travel along the surface of the Earth are called:

When an earthquake ruptures, the first wave that reaches a distant seismograph would mostly likely be _____ because these waves travel the fastest.

The lithosphere consists of:

The _____ is the internal layer of the Earth that is composed mostly of iron (Fe) and nickel (Ni) and is in the solid state.

The oceanic crust is much thicker than continental crust.

Continental rocks are composed mostly of low-density, granitic type rocks and oceanic rocks are composed of mostly high-density, basaltic-type rocks, yet oceanic rocks can be found on continents. Which statement(s) best explains this?

Seismic data like the lines pictured on this 3D map help scientists understand the structure of the earth's core. This particular map helps scientists at Chesapeake Energy’s Oklahoma City headquarters choose the best spots to drill.

Photograph by Mark Thiessen

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Earth's Interior

Learn about the layers inside the Earth, inaccessible to humans.

• 2 min read

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Inside the Earth

The Earth's interior is composed of four layers, three solid and one liquid—not magma but molten metal, nearly as hot as the surface of the sun.

The deepest layer is a solid iron ball, about 1,500 miles (2,400 kilometers) in diameter. Although this inner core is white hot, the pressure is so high the iron cannot melt.

The iron isn't pure—scientists believe it contains sulfur and nickel, plus smaller amounts of other elements. Estimates of its temperature vary, but it is probably somewhere between 9,000 and 13,000 degrees Fahrenheit (5,000 and 7,000 degrees Celsius).

Above the inner core is the outer core, a shell of liquid iron. This layer is cooler but still very hot, perhaps 7,200 to 9,000 degrees Fahrenheit (4,000 to 5,000 degrees Celsius). It too is composed mostly of iron, plus substantial amounts of sulfur and nickel. It creates the Earth's magnetic field and is about 1,400 miles (2,300 kilometers) thick.

River of Rock

The next layer is the mantle. Many people think of this as lava, but it's actually rock. The rock is so hot, however, that it flows under pressure, like road tar. This creates very slow-moving currents as hot rock rises from the depths and cooler rock descends.

The mantle is about 1,800 miles (2,900 kilometers) thick and appears to be divided into two layers: the upper mantle and the lower mantle. The boundary between the two lies about 465 miles (750 kilometers) beneath the Earth's surface.

The crust is the outermost layer of the Earth. It is the familiar landscape on which we live: rocks, soil, and seabed. It ranges from about five miles (eight kilometers) thick beneath the oceans to an average of 25 miles (40 kilometers) thick beneath the continents.

Currents within the mantle have broken the crust into blocks, called plates, which slowly move around, colliding to build mountains or rifting apart to form new seafloor.

Continents are composed of relatively light blocks that float high on the mantle, like gigantic, slow-moving icebergs. Seafloor is made of a denser rock called basalt, which presses deeper into the mantle, producing basins that can fill with water.

Except in the crust, the interior of the Earth cannot be studied by drilling holes to take samples. Instead, scientists map the interior by watching how seismic waves from earthquakes are bent, reflected, sped up, or delayed by the various layers.

Which of the following things are not used to learn about the interior of the Earth?

Where does most of our knowledge about Earth's interior comes from?

Most of our knowledge of Earth's interior comes from the study of earthquake waves.

What provides us information about the interior of the Earth?

Seismic waves tell us that the Earth's interior consists of a series of concentric shells, with a thin outer crust, a mantle, a liquid outer core, and a solid inner core. P waves, meaning primary waves, travel fastest and thus arrive first at seismic stations. The S, or secondary, waves arrive after the P waves.

How do we know about the interior of the Earth quizlet?

Geologists have used two main types of evidence to learn about Earth's interior: direct evidence from rock samples and indirect evidence from seismic waves.