Iridium, a hard, whitish metal similar to platinum, is extremely rare on Earth. Extremely high concentrations of iridium on Earth result
from only two scenarios: massive volcanic eruptions that release iridium from deep within the Earth and meteorites that shower down on Earth from space. When scientists found concentrations of iridium 30 times higher than normal in rock stratum from 65 million years
ago, they concluded that a massive meteor or comet hit the Earth and caused the massive extinction of the dinosaurs.
Which of the following, if true, most strongly supports the scientist’s conclusion?
A. Volcanoes massive enough to generate high concentrations of iridium are very rare.
B. Massive volcanic eruptions occurred frequently 80 million years ago.
C. Most scientists support the hypothesis that a cosmic impact wiped out the dinosaurs.
D. The massive extinction that occurred 70 million years ago killed not only the dinosaurs but also 70 percent of all life on Earth.
E. A comet struck the earth some 120 million years ago, but no widespread extinction occurred.

Answers

Answer 1

Answer:

B. massive volcano eruptions occurred frequently 80 million years ago

Answer 2

Massive volcanic eruptions occurred frequently 80 million years ago is most strongly supports the scientist’s conclusion. Therefore, option B is correct.

If massive volcanic eruptions occurred frequently 80 million years ago, it suggests that the high concentrations of iridium found in the rock stratum from 65 million years ago could be attributed to these volcanic eruptions rather than a cosmic impact.

This would weaken the argument that a meteor or comet caused the extinction of the dinosaurs, as an alternative explanation for the elevated iridium levels is provided.

To learn more about the volcanic eruptions, follow the link:

https://brainly.com/question/30028532

#SPJ2


Related Questions

Qué semejanzas y diferencias reconoces entre las civilizaciones americanas (Mayas, Aztecas e Incas) y el pueblo Mapuche, previo a la conquista de los europeos? *

Answers

This is English Brainly, You can ask questions in Spanish Brainly

Es Brainly en Ingles, Puedes pedir preguntas en Brainly en Espanol.

A thrust fault increases the thickness of the crust as it moves toward a continental interior in a mountain belt; yet the crust beyond the mountain front stays the same thickness. Isostasy would suggest that the area at the mountain front, where the thrust emerges, should ________ over time.

Answers

Answer:

subside

Explanation:

Isostasy is a geographical term which describes the condition of gravitational equilibrium that exists within the Earth's crust and mantle, there by, making the crust stays above a heights that relies on its physical attributes, such as thickness and density.

In Isostasy, its occurrence process involves principles of buoyancy in which an Earth crust apply stress on the less stronger mantle, such that for over a geological time moves laterally in a way that the load is contained by height adjustments.

Hence, Isostasy would suggest that the area at the mountain front, where the thrust emerges, should SUBSIDE over time.

What moderates much of the air temperature over northwestern Europe?

Answers

Answer:The North Atlantic Drift Current moderates much of the air temperature over northwestern Europe, especially the British Isles.

Explanation:

How can you combat the danger of a single story?

How can teachers?

How can politicians?

Answers

Answer:

We should read it again and again.

And try understand what the author is willing to explain...

Teachers:

Teacher's used to read the every lessons at their free time.So that they can understand the concept very easily..

Given that point A is the midpoint of line segment ED, where E( -1,9) and A(4,5), what is the location of point D?

Answers

Answer:

D(9, 1)

Explanation:

Since A is the midpoint of ED, then;

A = ([tex]\frac{X_{1}+X_{2} }{2}[/tex], [tex]\frac{Y_{1}+Y_{2} }{2}[/tex])

A(4, 5) ⇒ 4 =  [tex]\frac{X_{1}+X_{2} }{2}[/tex] and 5 = [tex]\frac{Y_{1}+Y_{2} }{2}[/tex]

[tex]\frac{X_{1}+X_{2} }{2}[/tex] = 4

[tex]X_{1}[/tex] + [tex]X_{2}[/tex] = 8

But [tex]X_{1}[/tex] = -1, then;

-1 + [tex]X_{2}[/tex] = 8

[tex]X_{2}[/tex] = 9

[tex]\frac{Y_{1}+Y_{2} }{2}[/tex] = 5

[tex]Y_{1}[/tex] + [tex]Y_{2}[/tex] = 10

But [tex]Y_{1}[/tex] = 9, then;

9 + [tex]Y_{2}[/tex]  = 10

[tex]Y_{2}[/tex]  = 1

Therefore, point D has coordinates (9, 1).

Solve for x: 2 ( x+5 ) = 0

Answers

Answer:

x = -5

Explanation:

2 ( x+5 ) = 0

2x + 10 = 0

2x = - 10

x = -10/5

x = -5

Answer:

i think x=5

Explanation:

What season is it in St. Petersburg, Russia on March 30th?

Answers

Answer: spring!

Explanation:

there is no real explanation :)

'Season' is described as the 'divisions of time across the year according to the changes experienced across various environmental factors.'

- The season that resides in St. Petersburg towards March-end would be the 'Spring Season.'

The season depends on various factors:

Change in the ecology of the location. Variation in the climate of the place. The alterations in the atmospheric situations throughout the year. The hours for which the place receives daylight.

As per the meteorological reports, the season in St. Petersburg during March is the Spring season.

The temperature ranges between 24.4°F and 35.6°F with a mean of 4hours of sunlight per day.. It is the very beginning month of the spring season and therefore, cold is experienced by the inhabitants during this time. A slight rainfall is also expected that allows the flora of the place to grow and bloom.  

Learn more about 'season' here:

brainly.com/question/2797741

Which major economic activity in the Middle East occurs largely in the areas circled on the map above?

A) coal mining
B) farming
C) nomadic herding
D) oil production

Answers

Answer:

Which major economic activity in the Middle East occurs largely in the areas circled on the map above?

D) oil production

Answer:

D.) oil production

Explanation:

Got it right on edge 2020 :)

Who is known as missile man of india give answer by not searching on google

Answers

Answer:

Explanation:

It's apk Abdul kalam

Answer:

He is A.P.J. ABDUL KALAM.

Explanation:

He was an Indian aerospace scientist and politician who served as the 11th PRESIDENT of india from 2002-2007.

He was born and raised in Rameswaram.

He studied physics and engineering.

Lines b and c are parallel. Horizontal and parallel lines b and c are cut by transversal a. Where line b intersects line a, 4 angles are created. Labeled clockwise, from uppercase left, the angles are: (13 x + 9) degrees, 2, 4, 3. Where line c intersects line a, 4 angles are created. Labeled clockwise, from uppercase left, the angles are: 5, 6, (5 x + 9) degrees, 8. What is the measure of Angle6?

Answers

Answer:

  54°

Explanation:

We believe the intended angle numbering is as shown below. This means the marked angles are supplementary, so ...

  (13x +9) +(5x +9) = 180

  18x +18 = 180

  x + 1 = 10

  x = 9

Angle 6 is congruent to (5x+9), so has measure ...

  (5(9) +9) = 54 . . . . degrees

Angle 6 is 54 degrees.

What problems do mapmakers face when making maps?

Answers

Answer:

distortion

Explanation:

The earth isnt flat

Answer:

The map makers face the following problems when they are doing maps:

1. problems with the cartographic projection

2. representation of 3D objects in 2D.

3. capacity to represent on a map the geographic aspects.

4. ability to synthesize information

5. the use of appropriate conventional signs

Which of the following are characteristics of the Coriolis effect? Choose one or more: It has a maximum effect at the equator. It is caused by the Earth's rotation. It deflects surface water to the right in the northern hemisphere. It deflects surface water to the left in the northern hemisphere. It influences the surface ocean currents.

Answers

Answer:

Which of the following are characteristics of the Coriolis effect?

Choose one or more:

It is caused by the Earth's rotation.

It deflects surface water to the right in the northern hemisphere.

It influences the surface ocean currents.

The following are characteristics of the Coriolis effect:

B. It is caused by the Earth's rotation. C. It deflects surface water to the right in the northern hemisphere. E. It influences the surface ocean currents.

Coriolis effect is the way things move in some sort of deflection or curve when they travel over a long distance.

This phenomenon makes different aspects of the earth to move at certain velocities and is caused by the rotation of the earth.

This shift happens in the northern and southern hemispheres of the earth and it deflects the surface water.

Therefore, the correct answers are options B, C and E

Read more here:

https://brainly.com/question/1757337

Rough seas with dangerous icebergs describe which of the following locations?
A.
Río de la Plata
B.
Drake Passage
C.
Amazon River
D.
Angel Falls

Answers

Rough Seas With Dangerous Icebergs Describe Which Of The Following Locations? Drake Passage

Answer:

Drake Passage

I hope this helps

Which of the following is NOT native to Australia?

Answers

Answer: A, C and D

Explanation:

The correct answer is (D), sheep. Didgeridoos and boomerangs are artifacts invented by  Australian Aborigines . Koalas evolved in Australia, and to this day are only found in the wild in Australia. In contrast, sheep were first domesticated in ancient Mesopotamia and then brought by humans to other parts of the world. The first sheep were brought to Australia by ship, from the Cape of Good Hope in 1788.

Answer:sheep Explanation:


Which piece of evidence explains WHY the 5 themes of geography were created?

A.In 1984, educators sought to better organize the teaching of geography in kindergarten through 12th grade classrooms.

B.The themes were created by the National Council for Geographic Education & the
Association of American Geographers.

C.While these five themes have been since replaced by the National Geography
Standards, they still provide an effective organization for the teaching of geography.

D.Humans shape the landscape through their interaction with the land; this has both positive & negative effects on the environment.

Answers

Answer:

g

Explanation:

Which of the following statements is false? Group of answer choices South America's population remains concentrated in its interior, although many peripheral locations are growing rapidly. Strong cultural pluralism exists in a majority of the countries in South America. In general, the southern portion of South America is the most developed and the northeastern portion is least developed. Brazil alone accounts for over half the land area of South America.

Answers

Answer:

South America's population remains concentrated in its interior, although many peripheral locations are growing rapidly.

Explanation:

The continent of South America occupies a total area of 6.89 million square miles and has a populace of over 400 million. In South America, the estimated population is Fifty Six people per square mile. The three most populated countries in South America that are Venezuela, Ecuador, and Columbia all lie on the peripheral region of the continent. Therefore the statement that South America's population remains concentrated in its interior is false.

A wooden block 72cm long,42cm wide and 36cm high,is to be cut into cubical blocks of side 7cm.What is the maximum number of cubical blocks obtained?

Answers

Answer:

  300

Explanation:

The larger block can be cut into 7 cm pieces for a total of 10 pieces along the 72 cm dimension, 6 pieces along the 42 cm dimension, and 5 pieces along the 36 cm dimension. That will yield a total of

  10 × 6 × 5 = 300 . . . cubical blocks

__

Remaining scraps could be fastened together to make additional blocks.

Answer:

300

is the maximum number of cubical blocks that obtained.

why do you think our people in the past not trade in a large scale?​

Answers

Answer:

The Industrial Revolution, for example, brought large-scale changes to our socio-economic structures and the kinds of work people

What are the most appropriate metric units to use to measure? 1. The distance to the door. 2. The amount of water in a glass. 3. The weight of the homemade chocolate chip cookie you wish you had. 4. The distance between you and the nearest stop light.

Answers

Answer:

1 and 4

Explanation:

because they are measures of nearness or farness(distance)

2. is a measure of volme while 3. is a measure of weight

Biggest lake In the world?

Answers

Answer:

Caspian Sea

Explanation:

The Caspian Sea in Asia is the largest lake in the world, with an area of 143,000 sq miles.

Hope this helped!

Caspian Sea

Biggest lake In the world is the Caspian Sea

PLEASE HURRY

analyze the map below and answer the questions that follow

on the map above what landform is located at oval C
the sahel
the Sahara Desert
the Nile River Valley
the Atlas Mountains

please select the best answer from the choices provided​

Answers

Answer: The Nile River Valley

Explanation:

Answer:

C. THE NILE RIVER VALLEY

Explanation:

WHY, BECAUSE IF YOU WERE TO LOOK CLOSE ENOUGH YOU WILL SEE THE RIVER AND THE VALLEY

ANOTHER REASON IS JUST THAT I KNOW

hOPE tHIS hElPS

pERIOD poOH

HELP ME HELP ME HELP ME !!!!!!!!!!!!!!! https://brainly.com/question/17190497

Answers

WHATS THE QUESTION???

Answer:what is the question

Explanation:

Solve for x: 2 ( x+5 ) = 0

Answers

Answer:

x=-5

Explanation:

Answer:

x = -5

Explanation:

Distribute 2 to the parentheses:

2(x + 5) = 0

2x + 10 = 0

Subtract 10 from both sides:

2x = -10

x = -5

Write a description of what happens to the water when it rains in your neighborhood. In your writing you should answer the following questions: Where does the rainwater go once it hits the ground? Where do you see that the rain is absorbed? Where does runoff occur? Where do you think most of the water ends up?

Answers

Answer:

The question can be best explained in the light of the world hydrological cycle.

Explanation:

This is a process of the hydrological cycle were the waterfalls in the form of rains and later on gets absorbed or evaporates from the ground or natural vegetation. This falling water may also get collected as lakes and other water bodies. When it rains in the neighbour the water the falls on the ground is in filtered through the pore of the soil and percolates deep down to form aquifers and groundwater table. This water body acts as a reservoir and in the end, meets with the water of the ocean and sea through the subsurface flow.

Why is millet grown in the Sahel? A. It tastes better than wheat or barley. B. It is cheaper to grow than wheat or barley. C. It requires less water to grow than other grains. D. It has a longer cultivation cycle than other grains.

Answers

I would say C. It makes sense

Answer:

D. It has a longer cultivation cycle than other grains.

Explanation:

Compare and contrast spatial variation and spatial association

Answers

Answer:

The difference now is that the object involves some kind of computation. And there is a strong emphasis on physicality, form, and tactile ...

the fastest growing major religion in the world is ​

Answers

Islam is growing faster than any other religion.

In fact, some demographers believe that around

the year 2070, muslims will outnumber christians.

Christian populations are still growing, but not

nearly as fast to keep up with the pace of muslims.

QUICK DUE IN A FEW MINUTES!!!what’s my responsibility as a citizen to the earth

Answers

Answer:

growth

Explanation:

ur living the life as once ur was a child than a kid to a teen and final to adults there many purpose as ur responsivlity

Which statements accurately describe soil? Check all that apply.

1)Soil condition directly affects crop growth.

2)Soil is used faster than it is replaced.

3)Soil cannot be replaced in a short time.

4)The amount of soil on Earth is unlimited.

5)The destruction of soil can take just minutes.


Answer is 1,2,3,5

Answers

Answer:

1, 2, 3, and 5 are the correct answers.

The correct statements are that-

Soil condition directly affects the crop growth.Soil is used faster than it is replaced.The soil cannot be replaced in a short time.The destruction of soil can take just minutes.

The correct set of options that match the statements above are as under 1, 2, 3 and 5.

Soil

If the soil is infertile, there will be poor or no growth of crops. If the soil condition is healthy, the crop growth will be good.

The soil replacement takes place gradually over a period of time due to natural events like wind, rain, etc.

The amount of soil on Earth is limited at a given point of time. Due to deforestation, the amount of soil is also getting reduced.

Destruction of soil can happen due to natural calamities like landslides, earthquakes, etc.

Hence, the statements as under 1, 2, 3 and 5 are correct about the characteristics of soil.

Learn more about soil here:

https://brainly.com/question/1698808

Porosity increases:_________. a. when grains settle more closely together after deposition.b. with increasing crystallization between grains in sedimentary rock. c. with the cementing of sediments by minerals from groundwater. d. when rocks develop joints or fractures.

Answers

Answer:

The correct solution is Option d (when rocks develop joints or fractures ).

Explanation:

Porosity is observable from descriptive samples taken. The drawbacks of receivable dams are that this is impossible to make true reflection temperature measurements, specific side-wall concrete samples while being often valuable can also result in poor coverage as well as dependence on log-derived porosity seems to have become the standard.As porosity rises, too much wind needs to pass further through most of the shelterbelt, which would be to say the less significant decrease in wind direction.

Some other available scenarios have no connexons with the particular circumstance. So this seems to be a reasonable option.

Other Questions
Question 2 Multiple Choice Worth 5 points)(03.01 LC)The leg of a right triangle is 2 units and the hypotenuse is 4 units. What is the length, in units, of the other leg of the triangle?O2 units0 6 unitsO V12 unitsO V20 units Blaster, Inc., manufactures portable radios. Each radio requires 3 units of Part XBEZ52, which has a standard cost of $1.75 per unit. During May, the company purchased 24,120 units of the part for a total of $43,416. Also during May, the company manufactured 6,240 radios, using 20,620 units of part XBEZ52. The direct materials purchases variance is computed when the materials are purchased. During May, the materials price variance for part XBEZ52 was: Bigotry means?prejudicereligionviolence spiritualism land and sea corporation has just purchased some shoreline property, and according to their calculations it will cost 2.5 times as much to develop the land as much as it did to buy it. If land and sea believe it will end up spending a combined total of $13,457,500 on both the land and its developments, how much must be the land alone have cost? PLZZZ help!!!Find the area and the perimeter of the shaded regions below. Give your answer as a completely simplified exact value in terms of (no approximations). The figures below are based on semicircles or quarter circles and problems b), c), and d) are involving portions of a square. 6)the speed of light is approximately 186,000 mi/sec. It takes light from a particular star approximately 9 yrs to reach Earth. How many miles away is the star from Earth? Express the answer in scientific notation. Use 365 days in 1 year. The star is nothing miles away from Earth. Millie withdraws $1,000 from her checking account so she can have $1,000 in cash. If no other changes occur, M1 will Write as an equation: The sum of a number and 12 is 78. what's the purpose of active reading According to empirical studies, greater consumption is likely to lead to unhappiness. This condition is called _____. 11.Which of the following is not one of the problems and risks ofstrategic alliances between domestic and foreign firms? A. Overcoming language and cultural barriers B. The amount of time required to build trust, effective communication, and coordination between allies C. Developing mutually agreeable ways of dealing with key issues or differences D. Making it harder to pursue a multidomestic strategy as compared to a global strategy E. Suspicions about whether allies are being forthright in exchanging information and expertise. A cotton candy vendor has 27 cones of blue cotton candy to sell. If the blue cotton candy is 75% of the total number of cones, how many total cotton candy cones does he have? Cash$38,600 Short-term investments9,000 Accounts receivable40,000 Inventory240,000 Prepaid expenses17,400 Accounts payable87,200 Other current payables22,300 Multiple Choice 0.96 and 3.96. 2.99 and 1.25. 3.15 and 0.80. 3.15 and 0.32. Vanessa attempts to freeze liquid mercury. Which statements describe particle arrangement and motion that occur in mercury? Blossom, Inc., manufactures golf clubs in three models. For the year, the Big Bart line has a net loss of $4,700 from sales $201,000, variable costs $175,000, and fixed costs $30,700. If the Big Bart line is eliminated, $19,800 of fixed costs will remain. Prepare an analysis showing whether the Big Bart line should be eliminated. (Enter negative amounts using either a negative sign preceding the number e.g. -45 or parentheses e.g. (45).) g The following transactions occurred during March 2016 for the Wainwright Corporation. The company owns and operates a wholesale warehouse.1. Issued 30,000 shares of capital stock in exchange for $300,000 in cash.2. Purchased equipment at a cost of $40,000. $10,000 cash was paid and a note payable was signed for the balance owed.3. Purchased inventory on account at a cost of $90,000. The company uses the perpetual inventory system.4. Credit sales for the month totaled $120,000. The cost of the goods sold was $70,000.5. Paid $5,000 in rent on the warehouse building for the month of March.6. Paid $6,000 to an insurance company for fire and liability insurance for a one-year period beginning April 1, 2016.7. Paid $70,000 on account for the merchandise purchased in 3.8. Collected $55,000 from customers on account.9. Recorded depreciation expense of $1,000 for the month on the equipment.Required:Analyze each transaction and classify each as a financing, investing, and/or operating activity (a transaction can represent more than one type of activity). In doing so, also indicate the cash effect of each. (Amounts to be deducted should be indicated with a minus sign. If there is no cash effect, leave cell blank.) You sit down in history class and the teacher comes out with a pop quiz. You are stressed and likely consider the quiz a ____ since you have not yet read the chapter you are being quizzed over! The provisions of Mayflower compact would influence later documents like the articles of confederation. Which of the following is not a reason the colonists created and signed the Mayflower Compact? A. To keep order B. To protect the group C. To serve the "General good" D. To cut all ties with the British King A golfer misjudges a putt and leaves her ball way short, the ball going only half of the way to the hole. If the speed of the ball leaving the putter in the first case was vo and the force of resistance due to the grass remains the same, what speed should she have given to the ball to make the original putt? Victor fue al mercado para comprar manzanas, naranjas y platanos; las naranjas costaron el doble de lo 1ue pago por las manzanas y los platanos costaron 8 pesos menos que pas manzanas, en total gasto 100 pesos. Determina el precio de las manzanas, naranjas y platanos