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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Substance that cannot be broken down chemically into other substance are

Answers

Pretty easy one, it is simply an element, because elements are the main 'starting points' of any other mixture, per say. This is because they are like building blocks - For example, H20, or water, is a combination of Oxygen and 2 hydrogen, which are all elements.

The products of the electron transport chain are ATP and _____.water
glucose
oxygen
carbon dioxide

Answers

The answer is glucose

Nelly was reading about ecological pesticides. She found a website that said that skeletons of some organisms settle as sediments in the ocean. They are then used as pesticides because they are abrasive against pests. Which organism is the article discussing?A. dinoflagellates
B. diatoms
C. green algae
D. euglenoids
E. amoeba

Answers

The answer is B. When diatoms die and fall off the ocean column to the ocean floor, they become part of sediments over time. When they are mined and exposed, they turn to a diatomite. Diatomaceous earth is significant as a pest repellant because of its hygroscopic property and has very abrasive particle hence it absorbs the water-protective fats and oils from the outermost layer of insects.

Answer:

B. diatoms

(on plato)

A scientist measures the weights of two different animals. One is 250 grams. The other is 330 grams. In milligrams, what is the difference between the two weights of the animals?

Answers

The answer is 10,000 milligrams

The weight of the first animal is 250 grams

The weight of the second animal is 330 grams

The difference between the two weights in milligrams can be calculated as follows

= 300-250

= 80 grams

convert to milligram(multiply by 1,000)

= 80×1000

= 80,000 milligrams

Hence the difference in weight between the two animals is 80,000 milligrams

Please see the link below for more information

brainly.com/question/2665961?referrer=searchResults

in milligram.... (330-250) ×1000= 80000 !

Why are all the different parts of the cells necessary

Answers

In order to function properly, the cells have to have all of there parts!

Cells need their organelles to perform different tasks to maintain balance throughout the body. :)

A farmer cut a branch from his favorite, mature fruit tree, planted it in the soil, and it grew to be a new tree. The farmer's method of growing a new plant is a type of

Answers

Answer:

The correct answer is "asexual reproduction".

Explanation:

The missing options of this question are:

A) pollination.

B) seed production.

C) sexual reproduction.

D) asexual reproduction.

The correct answer is option D) "asexual reproduction".

Asexual reproduction of a tree involves the breeding of a new organism using a vegetative part as source, such as a branch, stems, roots, or leaves. Asexual reproduction results in a new organism being genetically identical to its parent, since no cross breeding takes places in this reproduction process.

It’s a type of cloning.

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