May you provide the statements, please?
Answer:
A mountain is a landform that rises high above the surrounding terrain in a limited area
Answer:
You should only choose to stay if it's evident that, the additional benefits in the extra study session to be gained are greater than the additional cost to be acquired if you've chosen to study 30 minutes more in class.
In this kind of scenario, students are implored to focus more on what will be of benefit to them than any other thing i.e advantage over disadvantage
Answer:
The main idea of any type of text (spoken or verbal), including a lecture, is the main, most important point the writer/speaker is making. In one text, there can be multiple main ideas. You can easily recognize the main ideas of a lecture by looking at its title and subtitles. For example, if you are listening to a lecture about the central nervous system, the main points could be the central nervous system itself and its most important parts, which will be represented by titles and subtitles.
When you're taking notes, you should write down the most important things the lecturer is saying. This includes the things that are closely related to the main ideas, such as definitions and explanations. If you are unable to write everything down (which is usually the case), you should focus on these main points and ignore the details, because it's more likely that you won't need them.
The heliocentric model was generally rejected by the ancient philosophers for three main reasons:
1) If the Earth is rotating about its axis, and orbiting around the Sun, then the Earth must be in motion. However, we cannot ``feel'' this motion. Nor does this motion give rise to any obvious observational consequences. Hence, the Earth must be stationary.
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2) If the Earth is executing a circular orbit around the Sun then the positions of the stars should be slightly different when the Earth is on opposite sides of the Sun. This effect is known as parallax. Since no stellar parallax is observable (at least, with the naked eye), the Earth must be stationary. In order to appreciate the force of this argument, it is important to realize that ancient astronomers did not suppose the stars to be significantly further away from the Earth than the planets. The celestial sphere was assumed to lie just beyond the orbit of Saturn.
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3)The geocentric model is far more philosophically attractive than the heliocentric model, since in the former model the Earth occupies a privileged position in the Universe.
