Pleicetocene radioactivity is the act of emitting radiation spontaneously.
The half-life of a radioactive isotope is a characteristic of that isotope and is not affected by any change in physical or chemical conditions.
Radiometric dating (often called radioactive dating) is a technique used to date materials, usually based on a comparison between the observed abundance of a naturally occurring radioactive isotope and its decay products, using known decay rates.

They just divide up seconds, into milli- micro- nano- etc. It's possible that the shortest interval of time is 10 to the -43 power seconds ... if time is discreet. Further details: The smallest..
The orientation of a rocks magnetic field can tell you it's relative age.
It depends on the context. In a.c. circuits, 'reverse polarity' describes a situation in which a device, such as a socket outlet, is wrongly wired -with the line and neutral conductors interchanged.

The spreading of the sea floor comes from magma oozing up between the cracks between continental plates as lava. This lava subsequently cools rapidly and forms solid rock.

The primitive atmosphere was mainly composed of CO2. However, with the emergence of life, this CO2 was reduced in photosynthesis and increased Oxygen. Now our atmosphere is mainly composed of Nitrogen.

the tilt of the earth affects the earth's climate by when the north is tilted closer to the sun it is warmer and sunny for six months strait. but when the north is tilted away it is colder and dark..
These pollutants are sulfur dioxide, particulates (such as dust and smoke), carbon monoxide, volatile organic compounds, nitrogen oxides, ozone, and lead. These pollutants were regarded as the greatest danger to human health. Because criteria were established to limit their emission, these materials are sometimes referred to as "criteria pollutants.

Plankton
The Coriolis effect is the apparent curvature of global winds, ocean currents, and anything else that moves freely across the Earth's surface, due to the rotation of the Earth on its axis.
When one plate, usually the denser one, is pushed underneath the other, less dense plate. This is called plate subduction.

constellation is an internationally defined area of the cee·qui·nox - Either of the two times during a year when the sun crosses the celestial equator and when the length of day and night are approximately equal. sol·stice - Either of two times of the year when the sun is at its greatest distance from the celestial equator. The summer solstice is the longest day of the year and the winter solstice is the shortest. lestial sphere.

The Sun is the closest star to Earth. The Sun is a huge mass of hot, glowing gas. The Sun is a huge mass of hot, glowing gas. The strong gravitational pull of the Sun holds Earth and the other planets in the solar system in orbit. The Sun's light and heat influence all of the objects in the solar system and allow life to exist on Earth.
The Sun is an average star its size, age, and temperature fall in about the middle of the ranges of these properties for all stars. Astronomers believe that the Sun is about 4.6 billion years old and will keep shining for about another 7 billion years. For humans, the Sun is beautiful and useful, but also powerful and dangerous.
As Earth turns, the Sun rises over the eastern horizon in the morning, passes across the sky during the day, and sets in the west in the evening. This movement of the Sun across the sky marks the passage of time during the day. The Sun's movement can produce spectacular sunrises and sunsets under the right atmospheric conditions. At night, reflected sunlight makes the Moon and planets bright in the night sky.
The Sun provides Earth with vast amounts of energy every day. The oceans and seas store this energy and help keep the temperature of Earth at a level that allows a wide variety of life to exist. Plants use the Sun's energy to make food, and plants provide food for other organisms. The Sun's energy also creates wind in Earth's atmosphere. This wind can be harnessed and used to produce power.
While it lights our day and provides energy for life, sunlight can also be harmful to people. Human skin is sensitive to ultraviolet light emitted from the Sun. Earth's atmosphere blocks much of the harmful light, but sunlight is still strong enough to burn skin under some conditions. Sunburn is one of the most important risk factors in the development of skin cancers, which can be fatal. Sunlight is also very harmful to human eyes. A person should never look directly at the Sun, even with sunglasses or during an eclipse. The Sun influences Earth with more than just light. Particles flowing from the Sun can disrupt Earth's magnetic field, and these disruptions can interfere with electronic communications.
No. They are made of ice and rock. The tail you see when a comet is near Earth is some of that melting because it is nearing the sun. When it is further away, comets have no tail.

Yes it is bad for the animals in ocean the sharks and the fishes and the huge ones too!

As a source of energy it releases carbon dioxide (CO2) when it is burnt that has been hidden away for millions of years. CO2 is a powerful greenhouse gas causing global warming, and the carbon cycle is not able to remove all this EXTRA gas from the atmosphere. Renewable energy from the sun or the wind is much better for the earth.

Actually a comet dosen't have energy to move. The reason it moves is because it orbits around the sun like the planets do. The gravity from the sun keeps it orbit.
Quasars are so far away that most look like single bright points in the sky - just like normal stars.