The idea that the Earth is a spherical served as the foundation for Christopher Columbus' exploration.
- The church exerted considerable influence over society during the Middle Ages, and the majority of explanations for observed events were perceived as commands from God. As a result, scientific growth made minimal progress during this time.
- At that time, ships were thought to fall when they approached the horizon, and the flat Earth notion was widely accepted across Europe. However, other philosophers asserted that the Earth was a spherical and that this property prevented observers from seeing the full surface of the planet.
- Since Christopher Columbus was among the thinkers who thought the Earth was spherical, he wanted to create a new trade route by circumnavigating the globe to reach the East Indies.
Thus the correct answer is Option C.
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Here's the full question-
Christopher Columbus's voyage was based on what scientific theory that had not at the time been confirmed through experiment?
A. An iron ship can still be buoyant if it displaces enough water.
B.The stars can reliably indicate which direction is north.
C.The earth is spherical, enabling westward sailing to reach eastern lands.
D.Using geometry, a sailboat can successfully travel in the opposite direction from the wind.
Answer:
D. Because war was forced upon them by Hitler
Answer:
Reduce the amount of CO2 in the air. ...
Increase the planetary temperature. ...
Make the planet breathable. ...
Construct plants for generating super-greenhouse gases made of complex combinations of carbon,chlorine and flourine. To successfully make Mars Earth-like, we would need to raise temperatures, have water stably remain in liquid form and thicken the atmosphere. ... The only greenhouse gas on the Red Planet that's abundant enough to provide significant warming is carbon dioxide (CO2), they noted. Man cannot alter the environment in Mars to make it more suitable for human habitation. It is virtually and logistically impossible to do so for various reasons. For this to work, you need massive changes in the environment which is not possible with what we have today. Transforming Mars into a life-friendly world doesn't have to be a herculean planet-wide effort. Humanity could make patches of the Red Planet habitable relatively cheaply and efficiently by placing thin layers of silica aerogel on or above the Martian surface, a new study suggests. Proponents of terraforming Mars propose releasing gases from a variety of sources on the Red Planet to thicken the atmosphere and increase the temperature to the point where liquid water is stable on the surface. These gases are called “greenhouse gases” for their ability to trap heat and warm the climate. Scientists have considered placing Mylar disks, with a diameter of 155 miles and a weight of 200,000 tons, to reflect sunlight onto Mars and heat the surface. The idea is that over many years, the rise in temperature would release greenhouse gasses.
<h2>for instance:
the base is 3 and the exponent is 2.</h2>
if the exponent is a negative number 
then the answer would be positive 9. if the number is even but with a negative number your answer with turn out possitive.
or your exponent is a negative odd number like 
the the answer would turn out negative : -27
you could see it for yourself by doing : -3 x -3 x -3 = -27
