Question

question 1a: what causes a solar eclipse? question 1b: when does the total eclipse begin? question 1c: make a labeled sketch of the sun during totality. click the step time forward button until part of the sun is visible. question 1d: approximately how long did the total part of the eclipse last?

Explanation:

• Question 1a: A solar eclipse occurs when the Moon passes between the Sun and Earth, blocking the Sun's light.
• Question 1b: The start - time of a total solar eclipse depends on the specific eclipse and the location on Earth. It is calculated based on astronomical predictions considering the orbits of the Moon and Earth.
• Question 1c: During totality of a solar eclipse, the Sun's bright disk (photosphere) is completely covered by the Moon. What is visible are the Sun's outer atmosphere layers like the corona (a faint, white - glowing halo). A labeled sketch would include labels for the Moon (blocking the photosphere), the corona, and might also label the chromosphere if visible as a thin red - orange rim just before or after totality.
• Question 1d: The duration of the total part of a solar eclipse can vary, but generally ranges from a few seconds to about 7.5 minutes. It depends on the geometry of the Sun - Moon - Earth alignment and the location on Earth's surface within the path of totality.

Answer:

• Question 1a: A solar eclipse is caused by the Moon passing between the Sun and Earth, blocking the Sun's light.
• Question 1b: The start - time of the total eclipse depends on the specific eclipse and location, based on astronomical calculations of orbits.
• Question 1c: A labeled sketch should show the Moon blocking the Sun's photosphere, with the visible corona and potentially the chromosphere labeled.
• Question 1d: The total part of a solar eclipse can last from a few seconds to about 7.5 minutes, depending on alignment and location.