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
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
What is World Earth Day? Why is it celebrated?
Essay
Explanation:
Every year on April 22, people around the world celebrate Earth day. The days Mark's the start of the environmental movement in 1970, and for the past 51 has resulted in policy change and a greater awareness of the environment. In 1969, junior senator goylord Nelson from Wisconsin announced college campuses to educate people about the dangers of air and water pollution.
The impact of the very first Earth Day was huge. It led to the creation of the environmental protection agency, which still exists today, and same of our most import environmental laws beings passed.
The direction or direction of an object or a place from the position of the observer is known as
Answer:
I believe the answer is: apparent place
What country does the Tigris and Euphrates river end in?
Answer:
The end in Iraq and dump into the Persian Gulf.
Explanation:
They start in Turkey then flow to the Persian Gulf.
3. In what year did the US Weather Bureau start officially naming tropical storms and
hurricanes?
Answer:
1950
Explanation:
A great number of destructive storms is not included on the list because they didn't start naming hurricanes until 1950. Hope this answers your question :)
Answer:
1987
Explanation:
1. Discuss how one culture contributed to modern
science.
Answer:
The Maya contributed by creating the first observatories and they learned the celestial movements. Seismologist study earthquakes, and volcanologist study volcanic eruptions .
Anyone know how to fill this out? Please help I'll mark brainliest!
Answer:
Europa:
España
Africa:
Equatorial Guinea
What best describes the purpose of the government
Answer:
El Gobierno es el principal pilar del Estado; la autoridad que dirige, controla y administra sus instituciones, la cual consiste en la conducción política general o ejercicio del poder ejecutivo del Estado.
Explanation:
explain the term"saltation of a running water on the external features of the earth
Explanation:
Saltation: Some of the fragments of the rocks move along the bed of a stream by jumping or bouncing continuously. This process is called as saltation.
5. Answer the following in one word or one sentence. a. A plant having two halves which snap shut when an insect sits on it. b. The modified sucking roots in parasitic plants. C. A relationship between two organisms in which both are benefited. d. The tiny pores present on the leaves through which gases enter and exit the plant.
Answer:
a.The Venus flytrap.
b.haustoria.
c.Symbiosis.
d.stomata.
Hope it helps you.What are the basic tools of Euclidean geometry?
Answer:
The straightedge and the compass.
Explanation:
The name is due to the fact that connecting points with segments, prolonging segments and drawing circles with a given center and a given radius are the basic geometric constructions described in the first three Euclidean postulates.
Which of the following are the leading native languages spoken in the United States? Select all that apply.
Spanish
Chinese
Italian
Russian
English
Korean
French
Hebrew
Answer:
Spanish English French Russian Korean and Chinese
Answer:
English
Spanish
Chinese
French
Korean
Russian
Explanation:
(Will mark as brainlist, only correct answer please help me)
Write down how our oceans are getting pollutted and atleast five remedies which can help us to reduce.
Answer:
are oceans are getting polluted by humans not properly throwing a way plastics and trash
Explanation:
1. limit the plastic we use and recycle the plastic we do use
2. Convince humans why they should stop killing the ocean
3. Have volunteers help clean the ocean
4. reduce any other substance such as glass, cardboard, etc. that get throw away by making less of the item
5. make more laws that prevent anything that could lead to pollution in the ocean
of Australia.
Which city is located at approximately 35°S, 149°E?
O Sydney
O Melbourne
O Canberra
O Adelaide
Answer:
Canberra
Explanation:
Hope it helps :)
Which landform does not appear in Alaska?
plateaus do not appear in Alaska. make sure to use the given key on the map
how might people in siberia need to adapt to their environment?
Answer:
Cardona concluded that the study shows how, over the more than 25,000 years that modern humans been lived in Siberia, various peoples have adapted to the region's cold weather and meaty food sources through selection on multiple genes that control several biological mechanisms.
Explanation:
industries that process raw materials before being transported to the market
Hey there! I'm happy to help!
The industries that process raw materials before being transported to the market are manufacturing industries. This normally takes place in factories or processing areas.
For example, a factory might take metal that it is obtained from the Earth ( a raw material) and manufacture it into a steel beam.
Manufacturing is known as the secondary sector of the economy as it is essentially the second step in the process after raw resources (primary sector) are obtained.
Have a wonderful day and keep on learning! :D
the question are in the picture
Answer:
1. 6:00
2. Pacific- Los Angeles, San Francisco; Mountain- Denver, Salt Lake City; Cental- Chicago, San Antonio; Eastern- Indianapolis, New York City
3. 7:00 in Washington D.C., 5:00 in Phoenix, 4:00 in Seattle
4. 1:00 in Washington D.C., 7:00 in Honolulu, 9:00 In Juneau
Explanation:
importance of a rhino
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.
Where can you find a grid system that uses longitude and latitude lines?
Why are neutrons an important part of nuclear fusion in the sun? (Hint: Think of Einstein's equation!) How can two protons become a proton and a neutron? (Remember what we learned the second week):
Explanation:
1 Nuclear Fusion reactions power the Sun and other stars. In a fusion reaction, two light nuclei merge to form a single heavier nucleus. The process releases energy because the total mass of the resulting single nucleus is less than the mass of the two original nuclei. The leftover mass becomes energy. Einstein’s equation (E=mc2), which says in part that mass and energy can be converted into each other, explains why this process occurs. If scientists develop a way to harness energy from fusion in machines on Earth, it could be an important method of energy production.
2. A Hydrogen atom contains one Proton and zero Neutrons. When two Hydrogen nuclei collide, one of the Protons undergoes a type of radioactive decay called Beta-plus Decay, where a proton transforms into a neutron. This happens when there are too many protons in the nucleus, because the positive protons repel each other.
Analiza la siguiente Frase: No todos han Reaccionado bien a la inmigración, hay compatriotas que atribuyen en el sentirse desplazados o interiormente humillados a la presencia de los Caribeños
identify one type of human activity that could put pressure on the Blue Mountains National Park.
Answer:
Brisk walking or jogging
Yard work (mowing, raking)
Dancing
Swimming
Biking
Climbing stairs or hills
Playing tennis or basketball
Explanation:
Based on the map, in which direction would you expect each of the following rivers to flow the Missouri River, the Colorado River, the Rio Grande?
Hey there! I'm happy to help!
A great way to see the direction a river runs is to see the two endpoints of that river. Whichever one is higher will most likely determine the direction the river flows just due to gravity. If a river starts in a mountain and ends in a lake that is north of the mountain, you can expect that the river flows north and not south just due to gravity.
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MISSOURI RIVER
We see that the West end this river is in the Rocky Mountain area and the other end is in the plains/plateau area. The Rocky Mountains are much higher than plains, so that means that that is where the river starts, and it will be flowing away from that. We see that the direction it goes is generally East.
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COLORADO RIVER
The West End of this river is in the plateaus and highlands while the other is in the Rocky Mountains. The Rocky Mountains, the high point, at the East end of the river, so it is going to be flowing West due to gravity.
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RIO GRANDE
This river also starts in the Rocky Mountains and appears to flow down into the highlands and plains. Since the Rocky Mountains are at the North part of this river, it is going to be flowing South.
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Have a wonderful day and keep on learning! :D
Tropical climates exist between which of the following latitudes?
A.
30° north and 30° south
B.
40° north and 40° south
C.
50° north and 50° south
D.
60° north and 60° sout
Answer:
30° north and 30° south
Explanation:
The Tropic of Cancer passes through 23.5 degrees North, whereas the Tropic of Capricorn passes through 23.5 degrees South. Tropical climate is experienced between these latitudes that is usually characterized by high temperatures along with humid weather condition.
Describe the relationship between the oceans and starts ?
Answer:
Ocean currents act much like a conveyor belt, transporting warm water and precipitation from the equator toward the poles and cold water from the poles back to the tropics. pls mark me branilest pls
4. Answer the following questions in 10 to 20 words. a) Define chronicle. b) What type of practices had worsened the life of women in the medieval period? c) Why are more literary sources available for the study of the medieval period? d) Name any two new elements introduced in the field of technology during the medieval period
Answer:a) a factual written account of important or historical events in the order of their occurrence.b) Women did not have access to equal rights in medieval times like they do now. Child marriage, widow burning, the purdah and polygamy further worsened the women's position.c) As compared with Ancient India, a large number of literary sources are available for the medieval period. They provide more reliable information and insight into the life of the people of the period.d) The period saw major technological advances, including the adoption of gunpowder, the invention of vertical windmills, spectacles, mechanical clocks, and greatly improved water mills, building techniques (Gothic architecture, medieval castles), and agriculture in general (three-field crop rotation).
Explanation:
hope it helps youIdentity landmarks natural man made
A man made forest example is Changa Manga in Pakistan or Mount Rushmore.
i dont know if that was what your answer was looking for but there you go!
if you could live abroad or some place else, where would it be and why?
Answer:
This ain't exactly one of those normal questions,... but you know,... I like it
Explanation:
You said abroad so I would live on a ship and sail the world as a passenger/merchant ship ,... not one of those huge cruisers but on one like the ones in "Shipwrecked" or "Swiss Family Robinson",... the answer as to why,... I think it would be incredible sailing and handling such a big vessel,... but also one that is small enough that you are still in touch with every wave that passes beneath you,... Happy Sailing,... Chow,...!
What has been the main result of violence in many countries?