1 High-High tide is the point in the tidal cycle where the sea level is at its highest. 2  Low-Low tide is the point in the tidal cycle where the sea level is at its lowest. 3  Spring-Spring tide occurs when the Sun and the Moon are aligned to combine for the largest tidal range of the highest high tide and the lowest low tide.
http://www.ducksters.com/science/earth_science/ocean_tides.php
The particular advantage of this theory of gravity (General Relativity) is that it explains, at a stroke, all the observed properties of gravity. For example the fact that it acts equally on all objects and substances becomes obvious when you thing of gravity as a distortion of space-time rather than a force.
http://math.ucr.edu/home/baez/physics/Relativity/GR/gravity.html
1 Low-Low tide is the point in the tidal cycle where the sea level is at its lowest. 2  Spring-Spring tide occurs when the Sun and the Moon are aligned to combine for the largest tidal range of the highest high tide and the lowest low tide. 3  Neap-A neap tide is when the tidal range is at its smallest.
http://www.ducksters.com/science/earth_science/ocean_tides.php
It may be hard to believe that the cause of gravity continues to remain one of the great mysteries of science, even to this day. This article will briefly explore our understanding of gravity. We are all familiar with the effects of gravity. The story of Newton being hit on the head by an apple leading to his discovery of gravity is often taught to school children. In short, gravity is a natural phenomenon by which all physical bodies attract each other. For example, the Earth attracts you and keeps you grounded. When you weigh yourself, you are actually measuring the effect gravity has on your body. Although this seems obvious, science still continues to debate what causes gravity.
http://www.louisdelmonte.com/what-causes-gravity/
In other words you are being accelerated upwards with respect to space-time by the force of the ground acting on your feet. It is exactly the same as the force which seems to push you back in your car seat when you accelerate, what is really happening is that the seat is pushing you forwards.
http://math.ucr.edu/home/baez/physics/Relativity/GR/gravity.html
Tides and the Moon. While the Sun and the rotation of the Earth both have some tidal impact, the location of the Moon has the biggest affect on the tide. The gravity of the Moon causes a high tide both on the side of the Earth directly below the Moon (sublunar tide) and the opposite side of the Earth (antipodal). Low tides are on the sides of the Earth 90 degrees away from the Moon. See the picture below.
http://www.ducksters.com/science/earth_science/ocean_tides.php
1 Spring-Spring tide occurs when the Sun and the Moon are aligned to combine for the largest tidal range of the highest high tide and the lowest low tide. 2  Neap-A neap tide is when the tidal range is at its smallest. 3  This occurs during the first and third quarters of the Moon.
http://www.ducksters.com/science/earth_science/ocean_tides.php
Scientists have been asking that question for thousands of years and still are working on an explanation. Gravity is the force that gives weight to objects and causes every particle to be attracted toward every particle.
http://www.dailyherald.com/article/20120124/news/701249876/
The force of gravity doesn't have anything to do with what the objects are made of, Gyuk said. A feather and a steel anvil fall at the same rate if you can ignore air resistance.. In the 1900s, Albert Einstein added a new curve to the gravity concept, literally.
http://www.dailyherald.com/article/20120124/news/701249876/
The world we live in consists of four dimensions, the three space dimensions and one that is not exactly time but is related to time (it is in fact time multiplied by the square root of -1). This is not at all easy to understand but it means that space-time as we call it has some rather weird properties.
http://math.ucr.edu/home/baez/physics/Relativity/GR/gravity.html
what causes gravity for kids
 For kids  gravity  causes a natural phenomenon by which all physical bodies attract each other.