Explanation:
The total range of energy which reaches the Earth from the Sun is called the solar spectrum
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Athens permitted citizens to take part directly in day-to-day affairs of government and became the worlds first democracy.
Direct Democracy is where the participating citizens are allowed to vote on legislation directly. This was the type of democracy Athens practiced and it was the first of its kind in the known world.
Answer:
European colonizers killed so many indigenous Americans that the planet cooled down, a group of researchers concluded. Following Christopher Columbus' arrival in North America in 1492, violence and disease killed 90% of the indigenous population — nearly 55 million people — according to a study published this year.
Explanation:
The Scramble for Africa was a competition between the European powers (Great Britain, France, Belgium and others) over colonies in Africa - the correct answer is "a competition for colonies". It happened between the end of 19th century and the beginning of 20th century.
