How do scientists know about the structure of the earth?

Question 21 options:

We have drilled all the way to the core of the earth.


We have drilled far enough into the earth to reach the mantle.


S waves from earthquakes can travel through both solids and liquids so they tell us what is inside the earth.


P waves from earthquakes can travel through both solids and liquids so they tell us what is inside the earth.

Answers

Answer 1

Answer:

I think it's " P waves from earthquakes can travel through both solids and liquids so they tell us what is inside the earth.  "

Explanation:


Related Questions

what is the function of Motor Proteins

Answers

Answer:

Motor proteins propel themselves along the cytoskeleton using a mechanochemical cycle of filament binding, conformational change, filament release, conformation reversal, and filament rebinding.

Hope this helps :)

Complete the following analogy.

Nucleus is to cell as _____ is to company.

President
Security Guard
Secretary

Answers

Answer: secretary its right

Explanation:

Answer:

secretary

Explanation:

i do oddysseyware

What is the primary source of energy in a food change

Answers

Answer:

It is the sun in most ecosystems as the light energy is fixed during photosynthesis and then transferred to other organisms via the food chain.

Explanation:

Which has been observed in the study of embryology?

A.Species whose embryos have similar traits rarely have a common ancestor.
B.Species whose embryos have similar traits always have similar body forms as adults.
C.All traits present in early embryos remain throughout development.
D.Some traits in certain embryos disappear as the embryo develops.

Answers

Answer:

D. Some traits in certain embryos disappear as the embryo develops

Explanation:

I don't know how I would explain it, but I can list some of the things that disappear such as...  Gill slits, and tails. Hope this helped :D

Answer:

D. Some traits in certain embryos disappear as the embryo develops.

Explanation:

Embryology is the study of embryos. Embryos of different animals such as mammals, birds, fish, reptiles etc. look alike that is they are very similar. Many traits of one type of animal appear in the embryo of another type of animal.

What is a structure within the cytoplasm that performs a
specific function within the cell? For example, vacuoles are
an example of one of these structures whose function is to
store substances in the cell.
a) organ
b) borganelle
с) organ system
d) organic compounds

Answers

Answer:

B. Organelle

Explanation:

the _____ is made of bones and hyaline cartilage.
suture
skull
nasal cavity
socket

Answers

I would guess skull
ANSWER: suture HOPE THIS HELPS!

What was the time frame?

500 Million Years Ago

900 Million Years Ago

650 Million Years Ago

4.6 to 4 Billion Years Ago

Answers

Answer:

4.6 to 4 Billion Years Ago

Explanation:

According to the researchs and studies, the earth formed about 4.54 billion years ago and the oldest known living organism date to around 3-3.5 billion years ago which are the first bacteria that formed in the water.

I hope this answer helps.

Which earth sphere do dogs belong in?

A. Geosphere

B. Hydrosphere

C. Biosphere

D. Atmosphere

Answers

Answer: Biosphere

Explanation:

The earth has been composed of various elements and spheres that are defined by air, water, land, life, etc. The dogs belong to the biosphere. Thus, option C is correct.

What is a biosphere?

A biosphere is one of the earth's spheres that has been constituted of other spheres like the hydrosphere, geosphere, atmosphere, etc., and is characterized by the presence of living things and life.

It comprises the ecosystem and the ecological cycles that are the most important element of the sphere. It includes various ecosystems that have various food chains and webs.

The dog is an animal that belongs to the biosphere as it is a living organism that is involved in various ecosystems like the forest, prairies, and arctic zones, and can adapt to varying temperatures.

Therefore, option C. dogs belong to the biosphere.

Learn more about the biosphere, here:

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Why is using the presence of chromosomes inside of a cell NOT a reliable method to
determine if the cell is a prokaryote or a eukaryote?

Answers

Because both prokaryotic and eukaryotic cells have chromosomes (prokaryotes, and more specifically, bacteria, generally have just one chromosome, but there are some bacteria as well as archaea—which are also prokaryotes—that have multiple chromosomes).

Since the chromosomes are DNA molecules present in both the prokaryotic and eukaryotic cells, it is not a reliable method to determine if a cell is prokaryotic or eukaryotic

The nucleus of a eukaryotic cell is bounded by internal membrane, therefore, it is distinctive.

In contrast, the nucleus of a prokaryotic cell lacks internal membrane, hence its nucleus is not distinctive.

Chromosomes are Deoxyribonucleic (DNA) molecules that carry genetic information of a cell or organism.

The chromosomes are present in both the eukaryotic and prokaryotic cells. Chromosomes present in the eukaryotic cells are called eukaryotic chromosomes while chromosomes present in the prokaryotic cells are called prokaryotic chromosomes.

Since the chromosomes are DNA molecules present in both the prokaryotic and eukaryotic cells, it is not a reliable method to determine if a cell is prokaryotic or eukaryotic

Learn more here: https://brainly.com/question/2088739

A solution of pure water is separated from a concentrated sucrose solution by a partially permeable
membrane. In which direction will molecules flow, and what substance will these molecules be?

Answers

Answer:

This is definitely osmosis and the substance is liquid and would flow in the direction of permeable membrane

HELP HELP HELP HELP.......

Answers

Katie
80x25 = 2,000
380x5 = 1,999


PLEASE HELPPPPPPPPPPP

Answers

Answer: The grease helped the loosen the chain. This is because of increased friction, and also because a rusty and dirty chain also means a rusty and dirty gear set and drive train, and imprecise shifting.

Explanation:

Warm tropical water will tend to have a higher concentration of....
a, dissolved oxygen

b, zooplankton

c, Photic zone

d, salt

Answers

Answer:

Um B I hope my answer is right!!

Explanation:

An electromagnet is
O
A)a permanent magnet
B)made with bar magnets
C)attracts all metal substances
D)only operating when the current is on

Answers

Answer:

I think it's C

Explanation: I hoped this helped

Read the following sentences: "Just like you can't play football by yourself, 2 points
a tissue cannot do anything by itself. It teams up with other tissues, and
together, they perform the body's activities. So, a group of tissues team
up to form your nose and help you smell. Other tissues in your pancreas
help you digest food. So, each organ performs its specific function
because of the tissues that constitute it." As used in this sentence, what
does the word "constitute" most nearly mean? *
take away from something
give something energy
make up the parts of something
change in shape or size

Answers

Answer:

Constitute means like make it work/control, i think. Im pretty sure

Why are excess nutrients a problem?

Answers

Answer:

Excess nutrients are a problem because they cause nutrient pollution in bodies of water. This pollution can feed dangerous algae and can kill things that make oxygen.

which substance carries instructions for building a protein to other parts of the cell
a.) oxygen
b.) protein
c.) ribosome
d.) rna

Answers

The RNA is the answer

Answer:

RNA

Explanation:

EDGE2021

how does the law of universal gravitation affect earth's orbit

Answers

Answer:Newton realized that the reason the planets orbit the Sun is related to why objects fall to Earth when we drop them. The Sun's gravity pulls on the planets, just as Earth's gravity pulls down anything that is not held up by some other force and keeps you and me on the ground.

Explanation:

can someone help me solve #8 :(​

Answers

The type of cell being shown is Eukaryotic. This is evident because there is a nucleus in the picture. Since Prokaryotes do not have a nucleus, it is a Eukaryotic Cell.

The percentage of water in an animal cell?​

Answers

Answer:

75 percent of water in the animal cell

______________ rock forms beneath Earth's surface. *

1.Intrusive
2.Clastic
3/Nonfoliated
4.Origin
5.Pressure
6.Compaction

Answers

Answer:

Igneous rock

Igneous rock that forms when magma hardens BENEATH Earth's surface. Igneous rock that forms from lava on the earth's surface hardens (when magma cools ABOVE the ground).

(02.04 MC) Which description justifies why the theory of evolution is a theory and not a law? Explains how organisms change in response to the environment Predicts which organism is best suited to the environment Supported by a small amount of empirical evidence With more evidence it will become a law


WHO ANSWERS FIRST GETS 20!!! AND BRAINLIESTTTT

Answers

Answer:

Explains how organisms change in response to the environment (First Choice)

Explanation:

It's the first choice, because it basically describes about the relations between both the world, which the environments and the living organisms.

What can be said about the age of the seafloor at mid-ocean ridges?

Answers

Answer:

Scientists can determine the age of the seafloor by examining the changing magnetic field of our planet. ... While it cools down, it records the magnetic field during its formation. The two parts of the oceanic plate are pulled apart, and magnetic stripes become older as they move away from the mid-ocean ridge.

Explanation:

I didn't know so I googled it and this is what it came up with. I hope this helps!!

GIVING BRAINLIEST!!!!What stage of cellular respiration uses the high-energy electrons from NADH and FADH2 to form ATP molecules?

Krebs cycle
Electron transport chain
Fermentation
Glycolysis

Answers

Answer:

The answer is B- Electron Transport Chain

Explanation:

All those molecules are oxidized back to NAD+ and FADH molecules and the resulting H+ gradient works the ATP synthase to make ATP.

Hope this helped :)

ASAP
ATP is not involved with genetic information, it is an energy molecule. Why would we discuss it here with Nucleic acids?

Answers

Answer:

because nucleic acids are in living cells. they need energy to properly function especially in DNA and RNA.

Explanation:

WhO WaNTs sOmE MoRe pOiNtS aNd A bRaInLiEsTtTtT

Answers

Answer:

me i do

Explanation:

Answer:

me, thats all, just me

Explanation:

which term best describes an enzyme

Answers

An enzyme is a biological catalyst that seeds up chemical reactions

An enzyme is a biological catalyst that seeds up chemical reactions.

What is Enzyme?

A biological catalyst called an enzyme is usually always a protein. It accelerates a certain chemical reaction in the cell. The enzyme is continuously employed during the reaction and is not destroyed. Each enzyme molecule found in a cell is unique and tailored to a particular chemical reaction.

All biological activities in living things involve chemical reactions, and enzymes regulate the majority of them.

Many of these processes would not occur at a noticeable rate without enzymes. Every element of cell metabolism is catalyzed by enzymes.

Therefore, An enzyme is a biological catalyst that seeds up chemical reactions.

To learn more about Enzyme, refer to the link:

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Which of the following is an organic molecule?

A.NaCl
B.H2O
C.FeO
D.CH4

Answers

Answer:

D.CH4

Explanation:

Methane (CH4) is the prototypical organic molecule. Stick drawings of methane and some other organic molecules follow. Although uncommon, there are organic compounds that don't contain a C-H bond. For example, CCl4 is almost always classified as organic.

1. Describe the developments that led to the cell theory.

Answers

Answer:

Virchow saw cells dividing and added that living cells arise only from other living cells. All organisms are made of cells, all life functions occur in cells, and all cells come from other cells

Explanation:

Hope this helped you out.

What is the most important reason to control the conditions of an experiment?
O to make the experiment easier to repeat
O to reduce the amount of data that must be recorded
O because this is necessary for graphing the data
O because this is necessary for the data to be valid

Answers

Answer:

The answer would be the last choice, "because this is necessary for the data to be valid."

Explanation:

This is because in an experiment, things must be controlled or monitored in most ways; otherwise, the result of the experiment will be different from what it was meant to be. An experiment should be as exact as possible. If this is not possible, results may be unreliable.

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