Answer:
7) The Cretaceous period and it lasted for 80 million years
8) The Cenozoic era for 65 million years
9) 4.5 billion years ago
10) It began 252.2 million years ago
11) It ended 66 million years ago
12) About 190 million years
Explanation:
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Answer:
5) All of the above are correct.
Explanation:
Carbon dioxide is a greenhouse gas. When its concentration in the atmoshpere rises above normal, it can affect the climate pattern and lead to climate change.
Carbon dioxide prevents outgoing solar radiation from escaping the earth's atmosphere and this warms the earth surface. The more the presence of the gas, the more heating that would result.
Excessive release of carbon dioxide causes a phenomenon known as global warming. Global warming is simply the warming of the globe.
The consequences includes:
- Melting of Greenland ice sheets as temperature spikes.
- Glaciers and permafrosts in temperate and polar regions will melt.
- Ocean acidification due to dissolution of excess carbon dioxide in sea water to form carbonic acid.
- There is general increase in surface temperature due to accelerated warming.
Im pretty sure its D!
The Treaty of Tordesillas (Portuguese: Tratado de Tordesilhas [tɾɐˈtaðu ðɨ tuɾðeˈziʎɐʃ];[note 1] Spanish: Tratado de Tordesillas [tɾaˈtaðo ðe toɾðeˈsiʎas]), signed at Tordesillas in Spain on June 7, 1494, and authenticated at Setúbal, Portugal, divided the newly-discovered lands outside Europe between the Portuguese Empire and the Spanish Empire (Crown of Castile), along a meridian 370 leagues[note 2] west of the Cape Verde islands, off the west coast of Africa. That line of demarcation was about halfway between the Cape Verde islands (already Portuguese) and the islands entered by Christopher Columbus on his first voyage (claimed for Castile and León), named in the treaty as Cipangu and Antilia (Cuba and Hispaniola).
Iit means that the economy managed to 100 % used all of it's resources, which mean that :
- there will be no unemployment
- There would be no economic efficiency,
- and there is always a constant steady flow of capital
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