according to the fossil record, when did the earliest animals appear on earth?

Answers

Answer 1

Answer:

541 million years ago

Explanation:


Related Questions

seasonal changes on earth are primarily caused by the

Answers

Answer:

Earth's tilted axis causes the seasons.

Explanation:

Students want to determine the impact of soil erosion from the development of new housing. They plan to measure the density of a species of algae growing along the bottom of a river that flows through their town. The town is built in a heavily forested area, but a large area of trees along the river was recently clear-cut to allow for the construction of a new housing development, which has caused exposed soil to wash into the river. The river flows north to south through the town and is still forested both up- and downstream of the town. Which of the following would be the best control sample for the study?

a. A sample of water collected just downstream of the northern forest
b. A sample of water collected just downstream of the southern forest
c. A sample of distilled water
d. A sample of water collected just downstream of the housing development

Answers

Considering the situation described above, the statement that would be the best control sample for the study is "a sample of water collected just downstream of the northern forest."

The students want to measure the density of algae growing along the bottom of a river that flows through their town.

And given that the river flows north to south through the town, it is ideal for controlling the sample for the study through a sample of water collected just downstream of the northern forest.

Hence, in this case, it is concluded that the correct answer is option A.

Learn more about the research sample here: https://brainly.com/question/23536811

in the late nineteenth century, a large proportion of swedish immigrants that came to the united states settled in rural areas of Minnesota. descendants of these communities remain in minnesota today as shown on the map. which of the following best describes the pattern of swedish-american ethnicity within minnesotas cultural landscape?
a. a diffused pattern of swedish ethnicity evenly distributed across the state
b. a clustered pattern of swedish ethnicity
c. a swedish ethnic majority in the northern half of the state
d. a swedish ethnic majority throughout the state
e. a single remnant area with a high percentage of swedish ethnicity

Answers

Option c is correct. The best description of the pattern of Swedish American ethnicity is that there is a a Swedish ethnic majority in the northern half of the state.

This question involves a map so to answer it one must take a close look at the map. The map is made up of black, grey and white areas.

The answer to this question can be seen in the black area. This part has the most percentage of about 15% to 25%.

The Northern part of the map is the at the top of the map. Therefore we conclude that the majority of 15 to 25 percent are in the Northern half of the state.

Read more on https://brainly.com/question/17498794?referrer=searchResults

Most water leaves the ocean through _________ and returns to the ocean through ___________.

Answers

Answer:

Explanation:

Most water leaves the ocean through evaporation and  returns to the ocean through rivers

Which statement is NOT true of money and politics in North America?

Select one:

O a. The United States accrues national debt by issuing treasury securities to cover the expenses it has that exceed its

income from taxes and other revenues.

O b. Republicans believe that the debt is dangerous and needs to be reduced by cutting government spending.

O c. Democrats believe that some government spending, especially health care and education, should be reduced.

O d. A major reason for low voter turnout in the United States is the frustration created by the role of money in politics.

Answers

Answer:

C

Explanation:

Hope this helps!!!!!!!!!!!!

Write the introduction paragraph of your research paper. The introduction should include brief background information about your topic. It should also include a clear thesis statement. Because this will be an explanatory paper, the thesis should explain your topic clearly to your audience. Read about how to write a good thesis statement.

Answers

Answer:

The format of your introduction should be: Hook -> Few sentences connecting hook to thesis -> Thesis

Explanation:

When starting an introductory paragraph, your sentence should be a "hook," some fact, question, or description that captures the attention of the reader and makes them want to read more. For example, in an economics paper I'm writing my first sentence is "Two hundred years after its founding, the United States was in economic chaos." Your hook doesn't have to be exactly what your essay is about, but you should be able to connect it to your thesis (as will be seen).

After writing the hook, you should write two or three more sentences both elaborating on the hook, and trying to lead it towards your thesis. Your hook is usually a vague sentence, so the next few sentences should explain it more and, most importantly, connect it to the subject of your essay.

Finally, you should finish your introduction with the thesis, which is the most important sentence in your essay. The thesis explains what your point is, what you're arguing, and why what you're arguing is important. If you had to summarize your essay in a sentence, then that sentence would be your thesis. What's important is to include multiple main ideas within your thesis, and to let that guide the organization for the rest of your essay. In the order that you introduce your main ideas in the thesis, let each main idea have its own body paragraph where you can explain it further. Because the entire essay revolves around it, you should write the thesis before writing any other part of the essay.

The introduction paragraph of your research paper must contain all relevant background information that pertains to the research topic. You need to choose a topic and accordingly include preliminary information about the same as your background so the reader knows what your research is about.

What should an introduction paragraph of a research paper contain?

Background information: For instance, if your research paper is on the judiciary in the United States, then you must introduce the background of your research topic by including brief information about the judiciary in the United States, its nature, composition, and its history and how it pertains to your research. Thesis statement: A thesis statement appears at the conclusion of an introductory paragraph. It holds the summary of your main argument and the core of your research paper. The main point of your essay must be in the thesis statement which is usually one sentence long and is a controlling main argument of the research paper. Your audience should be able to understand your topic in a clear and concise manner. A good thesis statement makes your research topic clear to those who will read it. This is why your thesis statement in an explanatory research paper should explain and clearly elaborate upon your topic.

Therefore, an introductory paragraph in a research paper must contain brief background information about your research topic and a well explained usually concise, thesis statement.

Learn more about a research paper introduction through an example:https://brainly.com/question/11503354

#SPJ2

why do volcanic hazards vary in nature? (12 Marks)

Answers

Explanation:

cuz of topography, mantle etc

A volcano is a surface landform resulting from the extrusion of magma from underground as lava, ash, rocks, and gasses are erupted in various proportions. Each year, around 60 major volcanoes erupt globally. How hazardous each one is, depends on a variety of human and physical factors that interrelate to determine the level of impact on human activity that each event exerts. I will be looking at how the physical properties of a volcano, interact with human variables to make certain volcanoes more hazardous than others. This essay will incorporate exemplification from countries at different stages of development to discuss human factors and how this links with their physical geography. The scale will be primarily global; both development spread and tectonic activity are best presented in this manner.

The strength of an earthquake, measured on the Richter scale, often determines the level of damage caused by an earthquake. Therefore, it is reasonable to assume that the power of a volcanic event is illustrative of how potentially hazardous an eruption is going to be. The explosiveness can be measured by the Volcanic Explosivity Index (VEI); the higher the VEI, the greater the potential hazard. The type of magma, and ultimately the classification of volcano that is created, is a huge physical factor in determining a volcano`s explosivity. Magma comes in many forms and each chamber is unique. Therefore, a wide spectrum of lava types can occur. The viscosity of the magma is primarily determined by three factors: temperature, dissolved gasses, and the chemical make up. The hotter the magma is and the lower the silica content, the more fluid it will be and therefore the less explosive; if magma has a high level of dissolved gasses, then it is also likely to be less viscous. Thick lava, for example acid lava, has the potential to cause much larger and more explosive eruptions, therefore presenting a larger threat and increased potential for hazardous activity.

what is the geological setting of WA state

Answers

What is a click-and mortar store?




a store with an actual building




a store that sells online only




a store that sells products in malls




a store that sells products in stores and online

(Q004) Before the formation of the seven continents of the world, there was a supercontinent. What was it called

Answers

Answer:

pangaea

Explanation:

the major source of free oxygen in the atmosphere is from ________.

Answers

Answer:

Air

Explanation:

we breathe in air so as

to live

what percent of u.s. energy comes from nonrenewable energy sources?

Answers

it is said that around 85 percent of u.s. energy comes from no renewable energy sources such as oil, natural gas and of course, coal.

hope this helps and also brainliest please

who is this.
A. indra
B. izuna
C. itachi

Answers

Answer:

indra

Explanation:

In 2012, Japan had a population of 127,368,088 with 67% of its people living in cities.

Which factor BEST explains this population distribution?

Answers

Answer:

Urban areas provide more economic opportunities than rural areas

Explanation:

which of the following should have the highest surface tension at a given temperature?

Answers

Question -

Which of the following should have the highest surface tension at a given temperature?

A. CH4

B. CF4

C. CCl4

D. CBr4

E. CI4

Explanation:

E. CI4

 larger in size/larger molecule

I think this is your question but if not then Im sorry

where can you find the vast sand dunes of the curonian spit?

Answers

Answer:

German pronunciation (help·info); Latvian: Kuršu kāpas) is a 98-kilometre (61 mi) long, thin, curved sand-dune spit that separates the Curonian Lagoon from the Baltic Sea coast. Its southern portion lies within Kaliningrad Oblast, Russia, and its northern within southwestern Klaipėda County, Lithuania.:

why does jupiter have three distinct layers of clouds?

Answers

Answer:

Different layers represent clouds made of gases that condense at different temperatures. The gases will condense to form clouds at different altitudes on different planets because the condensation of a gas requires a specific amount of pressure and temperature.

if the maximum temperature for a particular day is 26°c and the minimum temperature is 14°c, the daily mean would be ________.

Answers

Answer:

20°C

Explanation:

What type of volcano forms as lava spreads over a long distance, and then cools and forms a hill that slopes gently?

Answers

Answer:

Shield Volcano.

Explanation:

write 4 characteristics of vegetation found in terai region ?​

Answers

Answer:

With distinct climatic conditions and geographic differences, Nepalese people have unique features in terms of human social diversity and their customs. Above them, eighty percent of Nepalese follow Hinduism, while rest of the population worships Buddhism and other local religions. The population constitutes various groups of different races that are further divided into different caste systems. The distinction in caste and ethnicity is understood more easily with a view of traditional hierarchy and stratification of the population. Looking at the existing myriad layers which are prevalent in caste system, Nepal sustains the features of multiethnic society.

Basically, some of the ethnic groups are: Gurungs and Magars who live mainly in the western region of Nepal; Rais, Limbus, and Sunwars who live in the eastern mid hills; Sherpas, Manangis, and Lopas who live near the mountains of Everest, Annapurna, and Mustang respectively; Newari community have strongholds in Kathmandu, the capital city of Nepal; Tharus, Yadavas, Satar, Rajvanshis, and Dhimals are found in the Terai region; and Brahmins, Chhetris, and Thakuris generally are over all parts of the country. In this respect, ethnic heterogeneity and mutual coexistence are foundational layers of Nepalese people.

Multiple ethnic groups speak more than a hundred languages in different dialects whereas Nepalese language is spoken throughout the country as the official language. English is spoken by many in government and business offices. It is the mode of education in most private schools of Kathmandu and some other cities as well.

In the northern region of the Himalayas are the Tibetan – speaking groups namely Sherpas, Dolpas, Lopas, Baragaonlis, Manangis. The Sherpas are mainly populous in the east in the Solu and Khumbu region; the Baragaonlis and Lopas live in the semi-deserted areas of Upper and Lower Mustang; the Managis live in areas of Manang district; while the Dolpas live in Dolpa district of West Nepal, one of the highest settlements on earth at 4,000 meters.

Why does economic growth lead to higher levels of pollution in emerging countries

Answers

Answer:

The environmental impact of economic growth includes the increased consumption of non-renewable resources, higher levels of pollution, global warming and the potential loss of environmental habitats.

Also, economic growth caused by improved technology can enable higher output with less pollution.

Explanation:


Explain the difference between a primary effect and a secondary effect

Answers

Answer:

In effects research, primary effects are those which are immediate or more predictable while secondary effects are those which are subsequent or less predictable.

Explanation:

2.2 State whether the following statements are TRUE or FALSE. Write only TRUE or FALSE next to the question number, for example 2.1.6 TRUE 2.1.1. The earth's crust is made up of the lithosphere and the continental crust. 2.1.2. The mantle consists of a thick layer of molten rock called lava. 2.1.3. The epicentre is the point in the earth's crust where an earthquake starts. 2.1.4. A crater forms when the cone of a volcano collapses. 2.1.5. Pangaea split into the continents as we know them today.​

Answers

leave my sight before my sight darkens

what's the capital of Texas?​

Answers

Answer:

Austin

Explanation:

Austin,city, is the capital of Texas, U.S

Hope this helped you- have a good day bro cya)

Austin city can be regarded as the capital of Texas.

Austin city which is been known as the capital of Texas can be regarded as an inland city bordering the Hill Country region.

Texas serves a county in the United States which is very famous with landmark.

Therefore, Austin city can be regarded as the capital of Texas.

Learn more about Texas at

https://brainly.com/question/13171394

where is sunset crater volcano national monument located?

Answers

Answer:

Arizona, United States of America

a north following river of asia name is​

Answers

Answer:

Indus and Mekong

Explanation:

what is produced by splitting the atom of a radioactive material?

A. gigantic waves
B. fossil fuels
C. nuclear energy
D. meltdown

Answers

When you split an atom it creates nuclear energy. I am starting by answering the questions I have learned in school, please let me know if it is wrong, I am trying to get my grades up. Thanks!️‍

Item 2Regional erosion occurs at a rate of 2 m per 1,000 years.How much regional erosion will occur over 100,000 years

Answers

This is almost like a mixture of math and geography. If it erodes 2m per 1,000 years and it is asking for how much does it erode over 100,000 years, you multiply 2m by 100. In this case, it erodes 200m per 100,000 years, and 2m per 1,000 years.

Graded Assignment
Webquest: Mesoamerican History
Total score: ____ of 60 points
The history of Mesoamerica is divided into different periods beginning with the Olmec period.
Use the keywords “Mesoamerican history” in a search engine to find reputable websites with information to answers the following questions.
Submit your completed worksheet to the Webquest: Mesoamerican History assignment link for grading.
Provide answers for each item below.
(Score for Question 1: ___ of 4 points)
1. List the year each period began and ended:
(a) Olmec
(b) Formative or Preclassic Maya
(c) Classic Maya
(d) Postclassic Maya
Answer:
Type your answer here.
(Score for Question 2: ___ of 4 points)
2. Describe the social structure that developed in the Olmec civilization and how they depended on each other.
Answer:
Type your answer here.
(Score for Question 3: ___ of 4 points)
3. List and describe the achievements of the Olmec.
Answer:
Type your answer here.
(Score for Question 4: ___ of 4 points)
4. Describe the colossal head that were built by the Olmec and why they were built.
Answer:
Type your answer here.
(Score for Question 5: ___ of 4 points)
5. The Maya did not unite to form a single united empire. Independent city-states or kingdoms with common cultural ties developed instead. What cultural elements did these city-states share?
Answer:
Type your answer here.
(Score for Question 6: ___ of 4 points)
6. Describe the branches of government of the Maya that developed during the Preclassic Period and describe the duties of those who served in the government.
Answer:
Type your answer here.
(Score for Question 7: ___ of 4 points)
7. Describe the important role that priests played in the Mayan culture. What were some of their duties?
Answer:
Type your answer here.
(Score for Question 8: ___ of 4 points)
8. List and describe the achievements of the Maya during the Preclassic and Classic periods.
Answer:
Type your answer here.
(Score for Question 9: ___ of 4 points)
9. By the period of Classic Maya a distinct social system had developed in the numerous Maya kingdoms. Tell about the social divisions and how these divisions impacted the lives of the Maya people.
Answer:
Type your answer here.
(Score for Question 10: ___ of 4 points)
10. The daily life of families was important to the survival of the culture. Describe this structure and how families worked together to ensure survival. Why was this necessary?
Answer:
Type your answer here.
(Score for Question 11: ___ of 4 points)
11. How are their lifestyle and the roles of men and women similar and different from life in our culture?
Answer:
Type your answer here.
(Score for Question 12: ___ of 4 points)
12. List and describe the achievements of the Maya during the Classic period.
Answer:
Type your answer here.
(Score for Question 13: ___ of 4 points)
13. Describe the factors that may have led to the decline of the Maya.
Answer:
Type your answer here.
(Score for Question 14: ___ of 4 points)
14. Identify four pieces of Ancient Mayan art or architecture. Cut and paste a small image of each or include a link to the item. Explain why you find each piece interesting.
Answer:
Type your answer here.
(Score for Question 15: ___ of 4 points)
15. How do the Maya live today?
Answer:
Type your answer here.

Answers

Answer:

11 types of propaganda techniques in advertising

Testimonial. This form of propaganda uses well-known or credible figures to influence the target audience. ...

Stereotyping. ...

Fear appeals. ...

Bandwagon. ...

Plain folks. ...

Transfer propaganda technique. ...

Name-calling. ...

Glittering generalities.


Which world regions are most likely to have people
practicing Daoism?


A.Oceania
B.North & South America
C.Africa & Europe
D.East Asia & Southeast Asia


No links

Answers

Answer:

east asia and southeast asia

what is frost shattering​

Answers

What Is Frost Shattering?

the mechanical disintegration of rock by the pressure of water freezing in pores and along grain boundaries.

Explanations:

frost weathering was volumetric expansion of freezing water. When water freezes to ice, its volume increases by nine percent. Under specific circumstances, this expansion is able to displace or fracture rock. At a temperature of -22 °C, ice growth is known to be able to generate pressures of up to 207MPa, more than enough to fracture any rock.

Hope It's Help

Answer:

Frost weathering is a collective term for several mechanical weathering processes induced by stresses created by the freezing of water into ice. The term serves as an umbrella term for a variety of processes such as frost shattering, frost wedging and cryofracturing.

What is meant by frost shattering?

The mechanical disintegration of rock by the pressure of water freezing in pores and along grain boundaries.

Explanation:

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