Relationship Between Moon Phases & Tides | Sciencing
Describe the phases of the Moon and explain why they occur. Explain how movements of the Earth and Moon affect Earth's tides. Explain how the earth, sun and. Feb 21, The Sun and the Moon exert gravitational pull on the Earth. This applies just as much to the oceans. When gravity pulls on the ocean, the water very slightly. MS-ESS Develop and use a model of the Earth-sun-moon system to describe the cyclic This relationship can be expressed by the following equation.How the Moon Affects the Ocean Tides - Tides and the Moon - CharlieDeanArchives / Archival Footage
If the Earth's diameter is 13, km, then the distance to the Moon is aboutkm. The time delay of radar echos 2. This image illustrates Ptolemy's method and the radar method Angular size of the Moon is close to 0. Small angle formula yields a value of 3, km for Moon's diameter, as shown in the figure below.
Kepler's third law applied to satellites orbiting the Moon gives the lunar mass. This law relates the mass of the central object to the period and the distance of the orbiting satellite, as indicated below.
Kepler's law With the mass and the radius of the Moon, we can compute the density. The phases follow the sequence of new Moon, first quarter, full Moon, and last quarter: Hence, we always see the same face of the Moon. This figure shows that the Moon rotates once each time it orbits the Earth. Notice that at A the lunar peak is to the right, while at B it is to the left. Thus from the Earth, we always see the same side of the Moon even though it turns on its axis. This phenomenon is caused by the tidal forces of the Earth on the Moon.
Why doesn't the Moon get completely dark and shows a reddish color during a Total eclipse?
- High and Low Nearly Twice a Day
- Oceans Are Pulled Up
- High Tides
The answer to this question is illustrated in the next figure, which shows that some of the rays from the Sun can be deflected toward the Moon as they cross the Earth's atmosphere this is known as optical refraction. Also, since the Earth's atmosphere is more opaque to blue ligth, the light that is deflected is also redder than sunlight.
This figure shows a sketch of how the Moon's shadow travels across the Earth: Why don't we observe eclipses at each full Moon or new Moon? Because of the Moon's orbital tilt, the Moon generally is either above or below the Earth's orbit.
Thus the Moon's shadow rarely hits the Earth, and the Earth's shadow rarely hits the Moon. This image shows that the Moon's orbit is tipped 5 degrees with respect to the Earth's: We often say that the Sun is "rising" or "setting", but actually it is the Earth's rotation that gives us the perception of the Sun rising up or setting over the horizon. When we look at the Moon or the stars at night, they also seem to rise in the east and set in the west.
Earth's rotation is also responsible for this. As Earth turns, the Moon and stars change position in our sky. Earth's Day and Night[ edit ] Another effect of Earth's rotation is that we have a cycle of daylight and darkness approximately every 24 hours. This is called a day. As Earth rotates, the side of Earth facing the Sun experiences daylight, and the opposite side facing away from the Sun experiences darkness or night time.
Since the Earth completes one rotation in about 24 hours, this is the time it takes to complete one day-night cycle. As the Earth rotates, different places on Earth experience sunset and sunrise at a different time. As you move towards the poles, summer and winter days have different amounts of daylight hours in a day. For example, in the Northern hemisphere, we begin summer on June At this point, the Earth's North Pole is pointed directly toward the Sun.
Therefore, areas north of the equator experience longer days and shorter nights because the northern half of the Earth is pointed toward the Sun.
Since the southern half of the Earth is pointed away from the Sun at that point, they have the opposite effect—longer nights and shorter days. For people in the Northern hemisphere, winter begins on December At this point, it is Earth's South Pole that is tilted toward the Sun, and so there are shorter days and longer nights for those who are north of the equator. Earth's Seasons[ edit ] It is a common misconception that summer is warm and winter is cold because the Sun is closer to Earth in the summer and farther away from it during the winter.
Remember that seasons are caused by the This results in one part of the Earth being more directly exposed to rays from the Sun than the other part.
The part tilted away from the Sun experiences a cool season, while the part tilted toward the Sun experiences a warm season. Seasons change as the Earth continues its revolution, causing the hemisphere tilted away from or towards the Sun to change accordingly. When it is winter in the Northern hemisphere, it is summer in the Southern hemisphere, and vice versa. The Earth's tilt on its axis leads to one hemisphere facing the Sun more than the other hemisphere and gives rise to seasons.
Solar Eclipses[ edit ] Figure A solar eclipse occurs when the new moon passes directly between the Earth and the Sun Figure This casts a shadow on the Earth and blocks our view of the Sun. A total solar eclipse occurs when the Moon's shadow completely blocks the Sun Figure When only a portion of the Sun is out of view, it is called a partial solar eclipse.
Tide Formation—Gravitational Pull | sexygf.info
Solar eclipses are rare events that usually only last a few minutes. That is because the Moon's shadow only covers a very small area on Earth and Earth is turning very rapidly. As the Sun is covered by the moon's shadow, it will actually get cooler outside. Birds may begin to sing, and stars will become visible in the sky. During a solar eclipse, the corona and solar prominences can be seen. Photo of a total solar eclipse.
During a solar eclipse, never look directly towards the sun even if the sun cannot be seen, as its harmful rays can damage your eyes badly.
Always use special glasses which filter out the harmful sun rays when seeing a solar eclipse. A Lunar Eclipse[ edit ] A lunar eclipse occurs when the full moon moves through the shadow of the Earth Figure This can only happen when the Earth is between the Moon and the Sun and all three are lined up in the same plane, called the ecliptic.
The ecliptic is the plane of Earth's orbit around the Sun. The Earth's shadow has two distinct parts: The umbra is the inner, cone shaped part of the shadow, in which all of the light has been blocked. The outer part of Earth's shadow is the penumbra where only part of the light is blocked. In the penumbra, the light is dimmed but not totally absent. A total lunar eclipse occurs when the Moon travels completely in Earth's umbra.
The Earth's shadow is quite large, so a lunar eclipse lasts for hours and can be seen by anyone with a view of the Moon at the time of the eclipse. The formation of a lunar eclipse.
Partial lunar eclipses occur at least twice a year, but total lunar eclipses are less common. The moon glows with a dull red coloring during a total lunar eclipse. The Phases of the Moon[ edit ] The Moon does not produce any light of its own—it only reflects light from the Sun.
As the Moon moves around the Earth, we see different parts of the near side of the Moon illuminated by the Sun. This causes the changes in the shape of the Moon that we notice on a regular basis, called the phases of the Moon.
As the Moon revolves around Earth, the illuminated portion of the near side of the Moon will change from fully lit to completely dark and back again. A full moon is the lunar phase seen when the whole of the Moon's lit side is facing Earth. This phase happens when Earth is between the Moon and the Sun.
About one week later, the Moon enters the quarter-moon phase. At this point, the Moon appears as a half-circle, since only half of the Moon's lit surface is visible from Earth.
Earth, Sun and Moon
When the Moon moves between Earth and the Sun, the side facing Earth is completely dark. This is called the new moon phase, and we do not usually see the Moon at this point. Sometimes you can just barely make out the outline of the new moon in the sky. This is because some sunlight reflects off the Earth and hits the moon.