The eras of the geologic time scale are best defined by a. Changes in climate b. Asteroid impacts c. Mass extinction events d. Old scientists in lab coats​

Answers

Answer 1

Hey there! I'm happy to help!

The Earth is extremely ancient (approx. 4.6 billion years), so its milestones are going to have to be something huge and very grand in scope that has also happened a few times.

Changes in climate can be significant, but these are not as important of an event in Earth's history to mark the different eras. While changes in climate can lead to more drastic things, the changes on their own are not good enough of a definer.

Asteroid impacts are pretty huge, but it doesn't make sense to have each era be marked by an asteroid impact because it is an extremely specific type of event and it hasn't happened a large amount of times in Earth's history, so this isn't going to be the principal marker.

Old scientists in lab coats is just a play on words of the question. Obviously the paleontologists and geologists chose what to have define the different eras, but it isn't like the scientists themselves ARE the actual markers.

The eras of the geologic time scale are best defined by C. mass extinction events. Asteroid impacts were under the umbrella of this, and that is why it wasn't the right answer. This is a much more broad term that represents the times that Earth was completely changed whether that be from an asteroid, an ice age, a volcano eruption, etc. These are huge in scope and happened many times in the history of the Earth, so it makes to have these mark the different eras.

Have a wonderful day and keep on learning! :D


Related Questions

Volcanic activity and the movement of tectonic plates are examples of _____.

ecological processes

human modification

climatology

erosion

geomorphic processes

Answers

Answer:

geomorphic processes involves vulcanicity and tectonic plates movements

What country is south of Macedonia

Answers

North Macedonia, officially the Republic of North Macedonia, is a country in Southeast Europe. It gained independence in 1991 as one of the successor states of Yugoslavia.

Greece boarders Macedonia to the south

How does deforestation affect the amount of water in rivers and the air we breathe?

Answers

Answer:

Internet Answer- Deforestation has an effect on global air quality because trees release water vapor into the air which affects atmospheric temperatures and other crucial elements that keep this earth of ours ticking over nicely... This inevitably results in all of us breathing dirtier and more polluted air than we otherwise would.

Question 1.
The Tropic of Cancer does not pass through
(a) Rajasthan
(b) Orissa (Now Odisha)
(c) Chhattisgarh
(d) Tripura
Question 2.
The eastern most longitude of India is
(a) 97°25’E
(b) 68°7′ E
(c) 77°6’E
(d) 82°32’E
Question 3.
Uttarakhand, Uttar Pradesh, Bihar, West Bengal and Sikkim have common frontiers with
(a) China
(b) Bhutan
(c) Nepal
(d) Myanmar
Question 4.
If you intend to visit Kavarati during your summer vacations, which one of the following Union Territories of
India you will be going to?
(a) Puducherry
(b) Lakshadweep
(c) Andaman & Nicobar
(d) Diu and Daman
Question 5.
My friend hails from a country which does not share land boundary with India. Identify the country.
(a) Bhutan
(b) Tajikistan
(c) Bangladesh
(d) Nepal
Question 6.
How many states and Union Territories does India have?
(a) India has 26 States and 7 Union Territories
(b) India has 25 States and 7 Union Territories
(c) India has 28 States and 7 Union Territories
(d) India has 28 States and 6 Union Territories
Question 7.
Which line divides India into approximately two equal parts?
(a) Equator
(b) Tropic of Cancer
(c) Tropic of Capricorn
(d) None of these
Question 8.
What is the position of India in the world in respect of area?
(a) 8th position
(b) 7th position
(c) 6th position
(d) 2nd position
Question 9.
Which meridian is fixed as a Standard Meridian of India?
(a) 82½° E
(b) 84½° E
(c) 86° E
(d) 81° E
Question 10.
The latitudinal extent of India lies between
(a) 7° 5′ N and 26° 5′ N
(b) 8° 4′ N and 37° 6′ N
(c) 12° 5′ N and 27° 5′ N
(d) 12° 5′ N and 37° 6′ N
Question 11.
Tropic of Cancer passes through which of these states
(a) Orissa
(b) Tripura
(c) Bihar
(d) Punjab
Question 12.
Which of the following longitudes is selected as the Standard Meridian for India?
(a) 68°7′E
(b) 82°30′E
(c) 97°25′E
(d) 23°30′N
Question 13.
Which of the following is the oldest route of contact between India and other countries of the world?
(a) Ocean routes
(b) Maritime contact
(c) Land routes
(d) Air routes
Question 14.
How many states and Union Territories are there in India?
(a) 28 states and 7 Union Territories including Delhi
(b) 23 States and 12 Union Territories
(c) 26 states and 9 Union Territories
(d) 30 States and 5 Union Territories
Question 15.
India achieved multi-faceted socio-economic progress during which of the following periods?
(a) Since ancient times
(b) During medieval period
(c) In the 21st century
(d) During the last five decades
Question 16.
Which of the following is the longitudinal extent of India?
(a) 8°4′N and 37°6′N
(b) 68°7′N and 97°25′E
(c) 68°7′E and 97°25′W
(d) 8°4′E and 37°6′E

Answers

Answer:

rajasthan hehhhxj3jfjqo1kdjhfhebcjsj2jjfjqkf

state nebular hypothesis regarding the origin of the earth​

Answers

Answer:

Our solar system formed at the same time as our Sun as described in the nebular hypothesis. The nebular hypothesis is the idea that a spinning cloud of dust made of mostly light elements, called a nebula, flattened into a protoplanetary disk, and became a solar system consisting of a star with orbiting planets [12].

Explanation:

Hope it help you friend

8. Answer the following questions in detail. a. Write a note on detritivores. b. What is parasitism? Explain the two types of parasites. How do leguminous plants enrich the soil?​

Answers

Answer:

(a)

Decomposers are of two types detritivores and saprotrophs based on how they decompose organic matter.  Detritivores. These organisms ingest the dead organic matter and digest and break it down internally into simple nutrients. Earthworms and dung beetles are examples of detritivores. An association between two organisms, in which one is benefited at the cost of the other, is called parasitism.  

(b)

There are two types of parasitic plants – Partial parasites and Total parasites.   Partial parasites. Some parasitic plants are photosynthetic and depend on the host only for water and minerals. Such plants are called partial parasites or hemiparasites. Mistletoe is an example of a partial parasite.  Total parasites – Some other parasitic plants depend completely on the host for sugar, minerals, and water. Such plants are termed total parasites. Cuscuta dodder or Amarvel is a typical example of a total parasitic plant. It can be identified by thin stems appearing leafless, with the leaves reduced to minute scales.

(c)

Many plants absorb soluble nitrogenous substances either nitrate ions or ammonium ions from the soil.

What island is located at 5° 52' 42" N, 162° 4' 8" W?

Answers

Answer: Kiribati

Explanation:

Recall What are the three factors of economic production?

Answers

Land , labor , entrepreneurship , and capital

How do plates move?( explain in detail)

Answers

Answer:

Plates at our planet's surface move because of the intense heat in the Earth's core that causes molten rock in the mantle layer to move. It moves in a pattern called a convection cell that forms when warm material rises, cools, and eventually sink down. As the cooled material sinks down, it is warmed and rises again

Plates at our planet's surface move because of the intense heat in the Earth's core that causes molten rock in the mantle layer to move. It moves in a pattern called a convection cell that forms when warm material rises, cools, and eventually sink down. As the cooled material sinks down, it is warmed and rises again.

How should we utilise the landform of Nepal for economic progress of the Nation? Suggest any seven point​

Answers

Answer:

hope this helps

Explanation:

Answer: The Himalayan region can be promoted for tourism. Crops like wheat, millet, and corn can be grown in the hill region which is mostly covered with dense forests and rice, and sugar cane can be grown in the Terai region. This way Nepal can utilize its diversity of areas and be economically stable country.

If it is 9:00 a.m. at Prime meridian (Greenwich meridian). What time is it in Kigali located at 30 degrees East?

Answers

Hey there! I'm happy to help!

Kigali is the capital of Rwanda, a small African nation surrounded by the DRC, Uganda, Tanzania, and Burundi.

The Prime Meridian has a longitude of 0°. Each time zone takes up 15° of longitude. Since 15×2=30, Kigali is going to be 2 time zones ahead of Greenwich. Why ahead?

Well, the Earth rotates counter clockwise, so if you look at the Earth from above, the parts in the East will rotate towards the Sun first, so they will experience sunrise and sunset before the other parts, so Kigali is ahead, not behind.

So, two hours ahead of 9:00 a.m. is going to be 11 a.m. in Kigali.

Have a wonderful day and keep on learning! :D

what is the distribution of power in legislative branch and executive branch in parliamentary and presidential governments

Answers

Explanation:

Defining characteristics of the parliamentary system are the supremacy of the legislative branch within the three functions of government—executive, legislative, and judicial—and blurring or merging of the executive and legislative functions. The legislative function is conducted through a unicameral (one-chamber) or bicameral (two-chamber) parliament composed of members accountable to the people they represent. A prime minister and the ministers of several executive departments of the government primarily carry out the executive function.

What do you think the cream parts of the thematic map show us in Source D?

Answers

Answer:

I think the cream areas are places that are in different altitude than the blue parts

Explanation:

What are the four general characteristics of a state?

Answers

Answer:

territory, population, government, and sovereignty.

Explanation:

The United States is a federal republic, which divides power among national, state, and local governments, but it is also a representative democracy, which means that

Answers

The people rule through elected representatives

the sculpting of the Earth's topography as they carry huge quantities of water from the land to the ____________.

Answers

Hey there! I'm happy to help!

The topography of the Earth is all of the unique changes in landscape with the different formations, elevation changes, etc.

It appears that this question is talking about rivers because it mentions something that carries huge amounts of water. Rivers are a principal factor in the sculpting of the Earth's surface as water can erode rocks and transport the sediments to other locations.

Rivers take water and transport to the sea. The sea is basically the ending point of the rivers as there is no where else for it to go. It is at the lowest elevation, so the rivers can't really flow anywhere else now.

Have a wonderful day and keep on learning! :D

Which are linear pairs? Check all that apply.

Answers

The pair of the linear angles include:

B. ∠BAC and ∠CAD

C. ∠BAE and ∠EAD

D. ∠EAD and ∠DAC

What are linear pairs?

Linear pair of angles are formed when two lines intersect each other at a single point. It should be noted that the angles are said to be linear if they are adjacent to each other after the intersection of the two lines.

Also, the sum of angles of a linear pair is always equal to 180. The linear pair of angles represents the sum of the angles of the pair is 180° which exist originated at a point of a line.

In other terms, the pair of supplemental angles stands for the linear pair.

From the figure shown, the pair of the linear angles exist,

B. ∠BAC and ∠CAD

C. ∠BAE and ∠EAD

D. ∠EAD and ∠DAC

Thus, Options B, C, and D are correct.

Learn more about linear pairs on:

https://brainly.com/question/16780814

#SPJ1

Complete question:

Which are linear pairs? Check all that apply.

A. ∠DAE and ∠EAD

B. ∠BAC and ∠CAD

C. ∠BAE and ∠EAD

D. ∠EAD and ∠DAC

E. ∠CAE and ∠BAD

1. What are lines of latitude? Which way do they run? Which way do they measure?

2. Where is 0 degrees latitude?

3. What are lines of longitude? Which way do they run? Which way do they measure?

4. Where is 0 degrees longitude?

5. What is a functional region?

6. What is a formal region?

7. What is the name of molten rock under the ground?

8. What is the name of molten rock when it reaches the surface?

9. Name the 5 themes and their definitions.

10. What is another name of a map maker?

11. What is a hemisphere?

12. Define a map legend or key, a compass rose, a scale.

13. Why is a population density map important to study?

14. Define biosphere, lithosphere, hydrosphere, and atmosphere.

15. What is a fault? What happens along a fault line?

16. What are the three layers of the Earth?

17. Describe the three major parts of the water cycle.

18. Large, deep pockets of water underground.

19. Characteristics of large scale and small scale maps.

20. What does the global grid consist of? What do you use to find an absolute location?

21. What is the difference between a political map and physical map?

22. Describe Sense of Place and Perception of place.

Answers

Answer:380 miles south of Ghana and 670 miles west of Gabon

Explanation:

does a siphon work in vaccume​

Answers

Answer:

The functioning of siphon is based on the atmospheric pressure.If there is vaccum, i.e., there is no atmospheric pressure, then there is no force on the liquid that can push the liquid into the siphon and siphon does not work.

Explanation:

No it doesn't work in vaccum

does anyone have world geography tips? im a freshman and want to stay organized and i just need at least 8 tips:)

Answers

Answer:

Use history and current events to make it stick

Start with the continents

Don’t sweat the small countries too much

Do you want me to help you with this?

The Alps are mountains that serve as a physical boundary between countries in Europe. According the article, the Swiss have created the world’s longest tunnel. How will this new tunnel revolutionize transportation in Europe and overcome this physical barrier?

Answers

The Gottard tunnel is a 57km (35 miles)

Answer:

The Gotthard Tunnel has opened up transportation in Europe. For the first time, there is a continuous high-speed rail network connecting the North Sea to the Mediterranean. The region where the tunnel is located is rugged and difficult to cross. What used to take several days on foot in the 1800s now takes only 20 minutes on 155-mile-per-hour trains. The travel time between places like Zurich, Switzerland, and Milan, Italy, is cut down by about an hour and a half.

Thanks to the Gotthard Tunnel, Europe is becoming more united than ever. The Alps are no longer a boundary that separates the countries of Europe from each other. With the Gotthard Tunnel, humans have conquered the mountain!

Explanation:

Describe how the landforms were formed​

Answers

Answer:

Tectonic plate movement under the Earth can create landforms by pushing up mountains and hills. Erosion by water and wind can wear down land and create landforms like valleys and canyons. ... Landforms can exist under water in the form of mountain ranges and basins under the sea.

6. The relationship between a law and a theory is (2 points)

1 laws are based on complex theories.
2 laws become theories.
3 theories all become laws.
4 theories never become laws. theories can become laws.​

Answers

Answer:

am not sure of what to choose from these options above so i maybe helped a explaining a bit

Explanation:

A law predicts what happens while a theory proposes why. A theory doesn't become a law with even enough explanation. A law is the description of an observed phenomenon. It doesn't explain why the phenomenon exists or what causes it. The explanation of a phenomenon is called a theory. It is a misconception that theories turn into laws. theories are theories and laws are laws

The earth's surface from the edge of a continent to the deep part of the ocean is called the continental shelf.
True or False

Answers

Answer:

true

Explanation:

A continental shelf is the edge of a continent that lies under the ocean. Continents are the seven main divisions of land on Earth

define the plate tectonics​

Answers

Answer:

What is a tectonic plate?

A tectonic plate (also called lithospheric plate) is a massive, irregularly shaped slab of solid rock, generally composed of both continental and oceanic lithosphere. Plate size can vary greatly, from a few hundred to thousands of kilometers across; the Pacific and Antarctic Plates are among the largest. Plate thickness also varies greatly, ranging from less than 15 km for young oceanic lithosphere to about 200 km or more for ancient continental lithosphere (for example, the interior parts of North and South America).

How do these massive slabs of solid rock float despite their tremendous weight? The answer lies in the composition of the rocks. Continental crust is composed of granitic rocks which are made up of relatively lightweight minerals such as quartz and feldspar. By contrast, oceanic crust is composed of basaltic rocks, which are much denser and heavier. The variations in plate thickness are nature's way of partly compensating for the imbalance in the weight and density of the two types of crust. Because continental rocks are much lighter, the crust under the continents is much thicker (as much as 100 km) whereas the crust under the oceans is generally only about 5 km thick. Like icebergs, only the tips of which are visible above water, continents have deep "roots" to support their elevations.

Most of the boundaries between individual plates cannot be seen, because they are hidden beneath the oceans. Yet oceanic plate boundaries can be mapped accurately from outer space by measurements from GEOSAT satellites. Earthquake and volcanic activity is concentrated near these boundaries. Tectonic plates probably developed very early in the Earth's 4.6-billion-year history, and they have been drifting about on the surface ever since-like slow-moving bumper cars repeatedly clustering together and then separating.

Like many features on the Earth's surface, plates change over time. Those composed partly or entirely of oceanic lithosphere can sink under another plate, usually a lighter, mostly continental plate, and eventually disappear completely. This process is happening now off the coast of Oregon and Washington. The small Juan de Fuca Plate, a remnant of the formerly much larger oceanic Farallon Plate, will someday be entirely consumed as it continues to sink beneath the North American Plate.

Hope it helps

I WILL MAKE U THE BRAINLEST This body of water borders North America's eastern coast:


Hudson Bay

Atlantic Ocean

Pacific Ocean

Bering sea

Answers

Answer: THE ANSWER IS THE ATLANTIC OCEAN.

Explanation:

Answer: Atlantic Ocean

Explanation: happy to help:) can i still get brainlest???

importance of a rhino​

Answers

Answer:

They're important grazers, consuming large amounts of vegetation, which helps shape the African landscape. This benefits other animals and keeps a healthy balance within the ecosystem. Local people also depend on the natural resources within rhino habitat for food, fuel and income.

Explanation:

I'm not sure but hope it helps.

San Jose, Costa Rica, is located near the equator. Choose the statement that most likely describes life in San Jose.

The people in San Jose wear lightweight clothing.
Kites are a favorite toy of the children in San Jose
Ski resorts are an important tourist attraction.
Recreational sailing is a popular activity.

Answers

Answer:

first one

Explanation:

which sweet water lake is situated at the higher altitudes?​

Answers

Answer:1000m

Explanation:

name the land marks that you or know about​

Answers

Machu Picchu, Taj Mahal, Great Wall of China, Eiffel tower, The great pyramid of Giza, Sphinx, leaning tower of Pisa.

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