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Question about Daily Periods

Sciences

Originais Teachy

Daily Periods

Medium

(Originais Teachy 2023) - Question Medium of Sciences

João likes to observe the sky every night before going to sleep. He notices that the stars and the Moon always appear at different times. During his observations, João notices that when he goes to sleep, a star is very visible in the sky, but when he wakes up, this star can no longer be seen. Based on the knowledge about Earth's movement, explain why João can observe the star before going to sleep and not when he wakes up. Use the concepts of Earth's rotation and the position of the stars in the sky throughout the day to support your answer.
a.
When João wakes up, the star is on the opposite side of the planet, so the sunlight prevents it from being seen in the sky.
b.
João can observe the star before going to sleep because the Sun shines brighter at night and hides the star during the day.
c.
João can observe the star before going to sleep because, during Earth's rotation, the position of the planet puts him under the star. When he wakes up, Earth's rotation moves him to a place where the star cannot be seen.
d.
The Moon interferes with the visibility of the stars, and when João wakes up, the Moon's position in the sky blocks the view of the star he observed before going to sleep.
e.
The star that João observes is the North Star, and it can only be seen when the sky is darker, which happens when João goes to sleep.

Answer sheet:

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