The sky is blue all day because the particles in our atmosphere cause light’s energies to scatter! Th
Group items tagged
Why does the sky change color at sunset? - 0 views
-
-
The reason we have color is because we have light! Beams of light contain different energies that our eyes then interpret as certain colors. When the sun shines onto Earth and lights up the sky, it shines waves of energies containing lots of colors
Red Sky at Night: The Science of Sunsets - 0 views
Why is the sky blue, sunsets red, and clouds white? * KidExplorers * ChristianAnswers.Net - 0 views
-
The sky is blue because of the “scattering” of sunlight. The color blue has a shorter wavelength and greater energy than the other colors. As a result, blue is selectively absorbed by air molecules, then given off again in all directions. The other colors are less scattered, and therefore not usually seen.
-
The sky is blue because its wavelength is shorter and it has more energy than other colors and the other colors are not always seen.
-
Ever wonder why a day has 24 hours and a minute has 60 seconds - OMG Facts - The World'... - 0 views
-
Egyptians (who used base 12) developed a sundial which looked like a T-shaped bar placed in the ground with would divide the time between sunrise and sunset into 12 parts. Because of the seasonal change in the length of time between sunrise and sunset, summer hours were longer than winter hours! Historians theorize that the importance of 12 is based on the number of finger joints on each hand (not counting the thumb) or the number of lunar cycles in a year. The division of the night into 12 parts was achieved by Egyptian astronomers who observed the appearance of 12 key stars in the night sky. Out of these divisions was born the concept of a 24-hour day. However, seasonal hour length was used for many centuries, and fixed hours became common only after the appearance of mechanical clocks in 14th century Europe!
-
-
The egyptians divided the night into 12 hours. So know the people are used t have 24 hours in a day. Many people think it was born like that but it wasn't the egyptians divided the night into 12 hours and also the day into 12 hours. That is 24 hours in total of the day.
-
Curious About Astronomy: Why is a day divided into 24 hours? - 0 views
-
December 2003 answer: It appears that the Egyptians were responsible for the 24 hour day. The Eqyptians were fond of counting in base twelve (instead of base 10 which is commonly used today). This is thought to be because they counted finger joints instead of fingers. Each of your fingers has three joints, so if you count by pointing to finger joints with your thumb you can count to twelve on each hand. This might seem arbitrary, but is actually just a strange as counting in base ten simply because we have ten digits.
-
The egyptians were the ones that were in charge of the 24 hours in a day because they had a system so they found a counting base in twelve.
-
-
The Egyptians divided the clock into 12 hours of daytime and 12 hours of night-time (or alternatively 10 hours between sunrise and sunset, an hour for each twilight period and 12 hours of darkness). This is known because of various sundials from the period which have been found to be marked with hours. Interestingly this means that hours started out changing in length with the seasons (as the amount of daylight vs. darkness changes).
-
they divided the clock in 12 hours because 12 in the night and about 10 in the sunrise that it became 12hours so that it is equal.
-
The egyptians divided the clock into 12 hours. 1,2,3,4,5,6,7,8,9,10,11,12 a.m and 1.2.3.4.5.6.7.8.9.10.11.12 p.m so that all the p.m could see the stars and the a.m the sunrise. Like there are 12 a.m and 12 p.m so 12 plus 12 equals24 thats why we have 24 hours in a day.
-
Why is a minute divided into 60 seconds, an hour into 60 minutes, yet there are only 24... - 0 views
-
Thanks to documented evidence of the Egyptians' use of sundials, most historians credit them with being the first civilization to divide the day into smaller parts. The first sundials were simply stakes placed in the ground that indicated time by the length and direction of the resulting shadow. As early as 1500 B.C., the Egyptians had developed a more advanced sundial.
-
Thanks to the duodecimal system. The egyptians used the system to make counting more easier. Also the number 12 is typically attributed.
-
-
A T-shaped bar placed in the ground, this instrument was calibrated to divide the interval between sunrise and sunset into 12 parts. This division reflected Egypt's use of the duodecimal system--the importance of the number 12 is typically attributed either to the fact that it equals the number of lunar cycles in a year or the number of finger joints on each hand (three in each of the four fingers, excluding the thumb), making it possible to count to 12 with the thumb.
-
The next-generation sundial likely formed the first representation of what we now call the hour. Although the hours within a given day were approximately equal, their lengths varied during the year, with summer hours being much longer than winter hours
- ...1 more annotation...
Why is the Sky Blue - Space Black - Sunset Red? - 0 views
-
In space, there is no air. Because there is nothing for the light to bounce off, it just goes straight. None of the light gets scattered, and the "sky" looks dark and black.
-
In the space there is no air because there is no particles or molecules for it to bounce and scattered so it has no color so it is just dark. And the sky looks dark,black in the night. Because there is no sun and the sun gives light to the molecules and particles.
-
-
In space, there is no air. Because there is nothing for the light to bounce off, it just goes straight. None of the light gets scattered, and the "sky" looks dark and black.
1 - 9 of 9
Showing 20▼ items per page