what did rusted layers of iron in sedimentary rock tell geologists about the chemical composition of the oceans long ago?

Answers

Answer 1

Answer:

They knew there was dissolved iron in the early oceans -- a strong indication that Earth's free oxygen concentrations were exceedingly low.

Explanation:

hope this helps


Related Questions

he map shows latitudes and longitudes for the state of North Carolina.



Which North Carolina city is located at approximately 36.0º N, 78.9º W?

Answers

Answer:

Answer :im doing the test now and i hope that its raleigh lolStep-by-step explanation:

Explanation:

1. What do rocks and fossils tell you about the geologic history at a particular location?​

Answers

Answer:

The type of rock can tell you if the land was formed by layers of sediment, lava, etc. Fossils can show how old they are and therefore how old the land around it is

Explanation:

what do Europe’s rivers suggest about early migration patterns ?

Answers

Answer:

Climate Change Some of the biggest human migrations coincided with major changes in climate, according to a new analysis. Researchers say early humans set out in search of climates where more food was available. And some populations stayed put in certain locations because barriers like glaciers blocked their progress

Explanation:

how is monsoon originated ?​

Answers

Answer:

IT has generally been held that the south-west monsoon owes its origin to the great difference of temperature which exists during the summer months between the heated land surface of India and the surrounding oceans, the general idea being that the warm air over the land rises, and damp air from the sea flows into

do models need to include every characteristic of something to be acceptable ?

Answers

Answer:

yes models require characteristic.

Explanation:

A good model is:

based on reliable observations.

able to explain the characteristics of the observations used to formulate it.

predictive.

able to explain phenomena that were not used to develop the model.

able to be refined when new, credible, conflicting observations arise.

Beyonce bench presses 1.5kn using 3000j of energy . Calculate the distance moved by the weights

Answers

Answer: 2

Explanation:

I’m not completely sure but I think that’s the answer

im so scared to turn in my exam on volcanic eruptions. ahhhhhhh!!!!!!!!!!!!!

Answers

Answer:

just do it im sure youll pass:)

Explanation:
I’m sure you passed!

For each diagram below, write an equation and solve for x.

Answers

Answer:(3x+3)+(x+7)=90, x=20

Explanation:

(3x+3)+(x+7)=90

4x+10=90

4x=80

x=20

The _____ is the difference between the highest and lowest points of a mapped area.
contour interval
contour line
relief
mean sea level

Answers

Answer:

relief

Explanation:

what are sea breeze and land breeze *long answer though*​

Answers

Answer:

sea breeze is a breeze that comes from sea and goes to land land breeze is the opposite so it would be land breeze is breeze coming from the land going   to the sea pretty easy if you ask me

Explanation:

Answer:

Sea and land breezes occur due to the difference in the cooling rates of land and sea.

Sea breeze (occurs during the day):

During the day, land gains heat quicker than the sea. Air directly above land is thus heated up and rises due to expansion (larger volume, lowered density). Air from above the sea thus moves towards the land to occupy the space previously occupied by the air above land, from an area of high pressure to an area of lower pressure, forming wind.

Land breeze (occurs at nighttime):

At night/evening, land loses heat quicker than the sea. Air directly above the sea is thus warmer. It rises due to lower density. Air from above land thus moves towards the sea to occupy the space previously occupied by the air above the sea, from an area of high pressure to an area of lower pressure, forming wind.

The greater the temperature difference between the land and the sea, the stronger the wind.

how wealthy is brazil

Answers

Answer: According to International Monetary Fund (IMF) estimates, Brazil's 2020 nominal GDP was R$7.348 trillion or US$1.363 trillion. Brazil is the 83rd country in the world in GDP per capita, with a value of US$6,450 per inhabitant. The country is rich in natural resources.

Explanation:

Based on the latest information released by International Monetary Fund (IMF), Brazil is ranked number 83rd country in the world in GDP per capita.

The economic situation of Brazil

Generally, Brazil is considered a developing nation. Located in South America, Brazil's 2020 nominal GDP was US$1.363 trillion. This implies that Brazil, with its current population, has a value of US$6,450 per inhabitant. Brazil is also known to be rich in natural resources.

Hence, in this case, it is concluded that Brazil is a developing country.

Learn more about Brazil here: https://brainly.com/question/92143

cual fue el momento esplendor del uso del carbón

Answers

Answer:

No se sabe muy bien, pero parece que de forma conocida, el carbón mineral empezó a utilizarse como combustible en China, hace unos 2000 años. También se dice que los ingleses conocieron su uso por aquella época y que de ellos aprendieron los romanos. El antiguo mundo no conoció, o no utilizó, el carbón mineral.

Find the product mentally of(ab+3)(ab-3)

Answers

a^2b^2-9

extra characters fjsjfjnsncjrifjjdjfndnfjsjfj

which features formed between south america and africa as the continents separated?

Answers

Answer:

The South Atlantic Ocean and a Mid-Ocean ridge

Due to the split of Gondwana, ancient land that used to be South America, Africa, India, and Australia, the ocean formed when the continents split. Also, the Ocean Ridge, aka the Atlantic Ridge is also found between the 2 continents.

Hope this helps!

what is the difference between compression and tension forces​

Answers

A tension force is one that pulls materials apart. A compression force is one that squeezes material together. ... For example, if you pull on a strong rope, it can support a large amount of tension. If you push on a rope, it cannot resist compression very well, and just bends.

Which layer of earth is liquid

Answers

Answer:

The Outer Core & Inner Mantle

Explanation:

The crust and the inner core are solid, whereas the outer core and inner mantle are liquid. The outer mantle is semi solid. The inner core is solid due to the massive pressure on it. Scientists theorize that the heat of the solid inner core is keeping the outer core in a semi-liquid state which allows the inner core to spin at a slightly different rate than the rest of the earth. This gives the earth its magnetic poles which diverts damaging cosmic rays from colliding with earth. The theories are the result of measurements during volcanic activity and sound waves. The mantle is a plastic solid of varying densities which allow convection currents to flow molten rock towards the earth's surface resulting in volcanic activity, tectonic plate movement, earthquakes, and movement of continents.

Have a great day! :D

Answer:

The Outer Core.

Explanation: I think this is the answer lol so ya 50 percent sure im right

explain how the physical geography of minnesota impacted early native settlement and european exploration of the region

Answers

Answer:

The first documented Europeans to set foot in Minnesota were French-Canadian voyageurs and fur traders who arrived as early as the 1600’s from the East. The geography of Minnesota created an ideal habitat for animals that produced high quality furs and was a primary reason that fur traders were willing to come from such long distances in these early years.

Explanation:

what type of force is the ring of fire

Answers

The abundance of volcanoes and earthquakes along the Ring of Fire is caused by the amount of movement of tectonic plates in the area. Along much of the Ring of Fire, plates overlap at convergent boundaries called subduction zones. That is, the plate that is underneath is pushed down, or subducted, by the plate above. Hope this helps

NEED ANSWER ASAP!!! WILL GIVE BRAINLIEST FOR BEST ANSWER!!!!!! 4. Would you expect a lot or just a little runoff from this feature? Explain.
5. Which satellite image shows the landform featured in this map?

Answers

Answer:

A lot because the lines are very close suggesting mountainous land, topically in more rainy areas and higher up what (high areas have cold and wet weather)

A

People from India (Indians) are the largest minority ethnic group in Southeast Asia.
true
false

Answers

the answer would be false

Answer:

false

Explanation:

The Davis family grows organic vegetables to sell at a local farmer’s market. Which are factors that directly affect their profit? Check all that apply.

Answers

an increase in the cost of farm equipment
-a rise in demand for organic produce
-an increase in customers at the market

Answer:

A.an increase in the cost of farm equipment

B.a rise in demand for organic produce

C.an increase in customers at the market

In relation to the structure and size of the sun how are the following achieved absorption , reflection,transmission,scattering and diffusion

Answers

Answer:

Explanation:

Scattering of solar radiation within the atmosphere also accounts for a reduction of energy reaching Earth. Atmospheric gas molecules and aerosols deflect solar radiation from its original path, scattering (reflecting) some radiation back into deep space and some toward Earth's surface.

Once the sun's energy reaches earth, it is intercepted first by the atmosphere. A small part of the sun's energy is directly absorbed, particularly by certain gases such as ozone and water vapor. Some of the sun's energy is reflected back to space by clouds and the earth's surface.

A Quick Overview of Light Absorption

In absorption, the frequency of the incoming light wave is at or near the energy levels of the electrons in the matter. The electrons will absorb the energy of the light wave and change their energy state.

HOPE THAT HELP

Which of the following is an example of a territory that has its own government but
is under the control of a foreign power?

A) Colony
B) Protectorate
C) Sphere of Influence

Answers

Answer:

A territory that has its own government, but is guided by a foreign power is referred to as protectorate

Explanation:

Protectorate – a country or territory with its own internal government but under the control of an outside power.

1. which of the following statement differentiate intensity from magnitude?

Answers

Answer:

Intensity measures the strength of shaking produced by the earthquake at a certain location

Explanation:

Which would most likely be found as a petrified fossil form?

Answers

Answer:

it would be dinosaurs skeleton

Explanation:

hope it helps

How long does it take a S-wave to travel 8,000 km?

Answers

11 Minutes and 20 seconds

Divergent plates pull away from each other to form mid-oceanic ridges and volcanic mountains.
True
false
30 points please

Answers

Answer:

I think its false sorry if im wrong :)

Explanation:

WILL MARK BRAINLIEST!!!! When magma cools _____, the crystals it forms are small. When magma cools _____, the crystals it forms are large.
quickly; slowly
slowly; quickly
slowly; very slowly
rapidly; very quickly

Answers

Answer:

quickly; slowly

Explanation:

slower makes there be enough time to cool

~ Alderr

What is a feeling of pride and loyalty to ones country called? *

A.Pluralism
B.Self-respect
C.Nationalism
D.Cultural-identity

Answers

Answer: C. Nationalism

Nationalism is a feeling of pride and loyalty to ones country.

Hope this helps! :)

....how did i end up in Canada?

Answers

You probably went to far south
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NO LINKS HELPNEEDED ASAPwhich of these is most important for the testing of a new drug to determine?A. its nameB. its effectivenessC. its costD. its flavor What does the horizontal line through the center of the wave on a graph represent? Which of these sentences is an opinion disguised as a fact? A 2014 New York Times editorial reported that approximately 30,000 to 35,000 African elephants were killed each year B.In 1999, in response to pressure from business interests that were losing money because of the ban on the ivory trade, CITES allowed limited trade in stockpiled tusks. C Only a complete ban of the ivory trade can save the African elephant from extinction. D. Ivory that already had been harvested from elephants could once again be bought and sold. Which of these is the best summary of the last paragraph?The narrator nodded in agreement after Tabitha explained why she decided to make her report about aninspirational teamTabitha explained that she made her report about Helen Keller and Anne Sullivan because they were aninspirational teamThe narrator clapped along with everyone after Tabitha finished her report about an inspirational teamTabitha explained why she decided to make her report about an inspirational team and everybodyclapped 8x - 60 less than or equal to 2 (5 - 3x) what is 2/3 times 3/7 What is held together by a metallic bond? HELPHOW AM I MEANT TO ANSWER THIS QUESTION I WOULD ASO LIKE ANSWER.THX Hemp help help math 6. Qu pas a los nios de Mara? Joseph is going to paint the panels of a fence. He is going to use the same repeating pattern for the entire fence. The rule is "orange, yellow, pink, green, purple." If there are 98 panels in the fence, how many will be painted green? Enter your answer in the box. Why are games very essential for students ? what does 2y-x=-14 equal? is this a dilation of 1/2 or a dilation of 2 What best describes Hitler's beliefs as expressed in Mein Kampf?A. Revolution was needed to create a classless society.B. Germans were part of a "master race."C. Germany could control the world with the help of the Japanese.D. All races could live peacefully under German domination. Write the correct form of the verb "prendre":Il a soif. 11un coca. Select the correct answer. Evaluate the following expression when x = -4 and y = 4. A. B. C. D. What is the main cause of global convection currents?A. DeforestationB. The Greenhouse effectC. The increase in the number of citiesD. Uneven heating of the Earth by the sun a -0.06 C charge is placed in a uniform electric field with a strength of 200 N/C. what is the magnitude and direction of the force on the charge Which point on the number line represents Negative three-fourths?A number line going from negative 2 to positive 1 in increments of 1. There are 4 equal spaces between each number. Point A is 1 mark to the right of negative 2. Point B is 1 mark to the right of negative 1. Point C is 1 mark to the left of 0. Point D is 1 mark to the left of 1.ABCD