How do scientists use seismic waves to determine the interior structure of Earth?

Answers

Answer 1
Answer: Much of our understanding of the basic structure and composition of Earth and the other planets in our solar system is not strenuously debated. We can infer a surprising amount of information from the size, mass and moment of inertia of the planets, all of which can be determined from routine astronomical observations. Measurements of surface chemical composition, either by direct sampling (as has been done on Earth, the moon, and Mars) or through spectroscopic observations, can be used to estimate elemental abundances and the degree of chemical differentiation that occurred as the planets condensed from the solar nebula. Remote observations of the gravitational field can be used to understand how a planet's mass is distributed, whereas the strength and shape of the magnetic field provides some constraint on the structure of a metallic core. The specifics of structure and composition, however, are much more debatable. And it is these details that tell us a much more extensive and ultimately more interesting story about the internal dynamics of the planets and their evolution. As a result, trying to determine them is frontier research in almost all fields of earth and planetary science.

hope that helped *smiles*
Answer 2
Answer: There are two kinds of seismic waves: p waves and s waves. P waves are capable of passing through both solid and liquid, and travels faster. S waves are slower, and can't pass through liquid. The speed of these waves are variable to the substance they pass through. Scientists are able to determine the interior surfaces of the Earth by measuring the seismic waves that an earthquake emits. We know that the outer core is liquid because s waves can't penetrate them, and we also know that the inner core is solid because there are some p waves that reflect off the boundary between the inner and the outer core. By measuring the time a seismic wave travels, it gives an impression of how the Earth is composed. When there is a change in the velocity of the wave, then the wave is passing through a different substance.

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What is the basis of the metric measurement system?A) Its measures are based on divisions that are powers of ten.
B) It is based on European measurement standards.
C) It is the only scientific measurement system.
D) It is based on the wavelength of krypton-86 radiation.

Answers

Answer:

The answer is:

A) Its measures are based on divisions that are powers of ten.

Explanation:

The explanation for why this is the answer is that it is true and obvious that the metric measurement system relies on certain divisions and prefixes that are based on the powers of ten such as "centi-" or "milli-". In short, the metric measurement system's basis is being able to have it's measures somewhat "altered" or "adjusted" by these particular prefixes to fit the item or subject or object being measured.

Which processes of the water cycle return water vapor directly to the atmosphere?

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Evaporation happens once the water vapor starts to return directly into the atmosphere. As water heats up due to the sun, it becomes a type of gas, and air will lead it towards the atmosphere since gas is accompanied by air - which is a type of gas. This leads to evaporation which then turns into rain - a form of water - once again. Thus, effectively making the cycle.
The process of evaporation returns water back into the environment. As the sun heats the water it will begin to evaporate and turn into water vapor that rises into the clouds to be rained down again by the process of condensation.

Someone help please!!!

Answers

Answer:

Building desalination plants and using rain gauges.

Explanation:

Using the process of elimination, seismographs are incorrect because they measure earthquakes and obviously earthquakes have nothing to do with droughts (ok, maybe a little bit). Snowplows are used to plow snow, so the remaining answers should be correct.

Which features of ingenious rocks are determined by their cooling rate ?

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Answer:

In igneous rocks, the texture is determined by their cooling rate.

Explanation:

What describes how sliding friction affects pushing a cereal box across a tabletop?

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Friction is defined as the force that opposes any applied force. Sliding friction affects pushing a cereal box in the sense that you have keep a constant applied force greater than the frictional force on the box to keep it moving. If you stop pushing, the box will stop due to the frictional friction. This is why a box won't keep moving across the table forever after you push it only a brief moment.

The egg cell of a plant is located in the
1. style
2. ovary
3. stigma

Answers

Hey there!

The egg cell of a plant is located in the Ovary.

Hope this helps!