most events like the rising and setting of the Sun were used a natural measurement of time until recently.
Solar time, which is based on the motion of the Sun, is not the only way of measuring time, however. One might keep track of the regular appearance of the full Moon. That event occurs once about every 29.5 solar days. The time between appearances of new moons, then, could be used to define a month.
One also can use the position of the stars for measuring time. The system is the same as that used for the Sun, since the Sun itself is a star. All other stars also rise and set on a regular basis.
Although any one of these systems is a satisfactory method for measuring some unit of time, such as a day or a month, the systems may conflict with each other. It is not possible, for example, to fit 365 solar days into 12 or 13 lunar months exactly. This problem creates the need for leap years
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I abbreviated most of it but there is a ton more at this link if you still need more.
It is called phosphorescent substances.
Answer:
The accepted views of science knowledge can change over time. Changes can result from new science observations, but can also be affected by social, political or religious convictions. To develop a deeper understanding, students need to investigate the context of the time in which science ideas were developed.
Explanation:
An ionic compound that results from the reaction of an acid and a base is called a(n) salt. the cation in this compound comes from the base while the anion comes from the acid.
When an acid and a base are together, they react to counteract each other's effects and create a salt.
Water is created when the OH(-) anion of the base and the H(+) cation of the acid mix.
A salt is a substance that is created when an anion from an acid and a base combine.
Common table salt, NaCl, is created when sodium hydroxide and hydrochloric acid are combined.
The positive ion (cation) of a base and the negative ion (anion) of an acid make up a salt.
A neutralizing reaction occurs when an acid and a base interact. Additionally, sodium chloride, generally known as table salt, is referred to as salt.
Learn more about neutralization reaction here brainly.com/question/23008798
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