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olga2289 [7]
2 years ago
11

Scientists infer that oxygen first began to enter the Earth's atmosphere after the appearance of

History
1 answer:
Vinil7 [7]2 years ago
5 0

Oxygen entered the Earth's atmosphere after the appearance of the Great Oxidation Event (Great Oxygenation Event). The Great Oxidation is the first mass extinction on Earth.

The Great Oxidation lasted 2.4 to 2.0 billion years ago.

Oxygen appeared on Earth thanks to cyanobacteria using photosynthesis.

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True or False: In the North, slave labor helped to provide the food necessary to feed the Union army.
skad [1K]

Slaves were used in the North for different purpose. In the North, slave labor helped to provide the food necessary to feed the Union army is a false statement.

<h2>Slavery in the North</h2>

In the north, plantation slavery were used in each colony, where they cultivate staple crop colonists chose to cultivate.

In the war,  African Americans were used for military purposes. in the South, they were used as enslaved labor and in the north, they were used as wage labor and military volunteers.

The North did not support slavery in full . They oppose slavery was based on political and anti-south sentiment, economic factors, etc.

Learn more about slaves from

brainly.com/question/9374853

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2 years ago
Mikhail
Lunna [17]
A: perestroika means openness thus meaning the people were allowed to be open about how they felt
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3 years ago
why did the 1933: New Deal / cooperative federalism / marble cake federalism cause a change in the makeup of the power balance b
stepladder [879]

1933: New Deal / cooperative federalism / marble cake federalism cause a change in the makeup of the power balance between local, state and national goverment in the following way

Explanation:

  • The United States moved from dual federalism to cooperative federalism in the 1930s. National programs would increase the size of the national government and may not be the most effective in local environments. Cooperative federalism does not apply to the Judicial branch of the government.
  • Each level of government is dominant within its own sphere. ... Marble cake federalism – Conceives of federalism as a marble cake in which all levels of government are involved in a variety of issues and programs, rather than a layer cake, or dual federalism, with fixed divisions between layers or levels of government.
  • As a theory, dual federalism holds that the federal and state governments both have power over individuals but that power is limited to separate and distinct spheres of authority, and each government is neither subordinate to nor liable to be deprived of its authority by the other.
  • The first, dual federalism, holds that the federal government and the state governments are co-equals, each sovereign. In this theory, parts of the Constitution are interpreted very narrowly, such as the 10th Amendment, the Supremacy Clause, the Necessary and Proper Clause, and the Commerce Clause
  • The advantages of this system are that it protects local areas and jurisdictions from the overreach of the federal government. The framers of the Constitution were afraid that the federal government would have too much power, and this system was a means of preventing that situation from developing.
  • Historically, the definitive example of dual federalism is the United States. ... These states can check the federal government through judicial action. Europe, too, has a system of dual federalism, albeit set up with state traditions. The European Union (EU) is organized into a federalist government with limited powers.

8 0
2 years ago
Do forces give every object its shape
lora16 [44]
Every Natural object
7 0
3 years ago
What did going over the top mean in world war 1 apex?
Sophie [7]
Leaving the safety of their trenches and attacking the enemy.
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3 years ago
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