The earth is estimated to be around 4.5 billion years old. This estimate is taken from the oldest available zircon crystal which dates back to 4.4 billion years. The dinosaurs are expected to exist around 0.3 billion years ago.
prime meridian
The angle between the line from Earth to Jupiter and the line from Earth to the Sun when Jupiter is at opposition is 180 degrees. This is because Jupiter, Earth, and the Sun are aligned in a straight line during opposition, with Earth in the middle.
The equator or any line of longitude or meridian.
The imaginary line that runs around the center of the Earth is called the Equator. It divides the Earth into the Northern and Southern Hemispheres and is situated equidistant from the poles. The Equator is significant for its role in determining climate zones and global time zones.
The horizontal line that goes around the "waist" of the Earth is the Equator. The vertical line that goes vertically around the Earth, through the poles, is the Prime Meridian.
Prehistoric time line
prime meridian
There is no time when the entire earth is completely dark. At any moment, 50% of the earth's surface has a direct, unobstructed line of sight to the sun, and the other 50% has no direct view of the sun.
The angle between the line from Earth to Jupiter and the line from Earth to the Sun when Jupiter is at opposition is 180 degrees. This is because Jupiter, Earth, and the Sun are aligned in a straight line during opposition, with Earth in the middle.
(E) None of the above. A time-line is a a continuous list of events which occur between a start and a finish. A time-line can have few or many entries, but its 'length' is comparative and subjective.... a short time-line in one area might be a long one in another.... eg, compare the time-lines of (a) all human activity on earth, and (b) human activity in space..... no-one would seriously state that the space time-line is short, or that it is not crowded with activity, but it is short in comparison to out time on earth. Find a different way to make your point. Ask yourself if a "time-line" actually what you wish to speak about, or would "life" or "life-cycle" be a better word?
The line across the Earth is called the Equator. It is an imaginary line that divides the Earth into the Northern Hemisphere and the Southern Hemisphere.
The time line or time slider in Google Earth allows you to select different times or animate a time ordered sequence. If placemarks contain time information then the time slider is displayed. Such time information can be used for GPS tracks or a visualization of a flu epidemic showing the spread from region to region. See related links for tutorial using the time slider controls.
The place on earth where time is farthest ahead is immediately west of the international date line.
it is a line
That's the only time when the moon is on-line between the Sun and Earth, so it's the only time when the moon's shadow can hit the Earth's surface.
The maximum time difference between two locations on Earth is 24 hours, which occurs when they are on opposite sides of the International Date Line.
The imaginary line through Earth's poles is called the axis. It is an imaginary line that Earth rotates around.