Question bank: Earth's Atmosphere

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Question 1:

Medium

During antiquity, the Greeks already discussed the shape of the Earth, using arguments and evidence to defend the idea that our planet is spherical. Of the arguments below, which one demonstrates the sphericity of the Earth using changes in the shadow of a stick (gnomon)?
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Question 2:

Hard

Earth's atmosphere, a complex layer of gases, plays a significant role in shaping the planet's climate and weather patterns. It is divided into multiple layers, including the troposphere, stratosphere, mesosphere, thermosphere, and exosphere, each with distinct characteristics and functions. Considering the composition and structure of Earth's atmosphere and its role in driving climate and weather, explain how changes in one layer could potentially lead to significant alterations in our weather patterns and climate. What could be the possible long-term consequences of such changes, and how could they impact life on Earth?
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Question 3:

Medium

Asteroids are rocky bodies that orbit the Sun in elliptical orbits in the belt between Mars and Jupiter and also in the outer belt between Jupiter and Neptune. Some asteroids have peculiar characteristics such as a close orbit to Earth or strange rotation in relation to other celestial bodies in the Solar System, being called Trojan asteroids or binary asteroids, respectively. Where are binary asteroids located?
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Question 4:

Hard

During the process of formation of the Earth, gases were released into the primitive atmosphere, such as carbon dioxide, nitrogen, and water vapor, thus creating an environment conducive to the evolution of life on our planet in the near future. Who was responsible for these changes in the composition of the atmosphere?
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Question 5:

Medium

The Earth is one of the planets in the solar system and has unique characteristics, such as sphericity. This characteristic was described by Aristotle in 330 BC, but it was only proven in 1522 when the Portuguese navigator Fernão de Magalhães crossed the Pacific Ocean. What happened to make it possible to prove the sphericity of the Earth?
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