The current geologic period, the Quaternary, begin around 1,800,000 years ago. Express this number in scientific notation.

1. How does the fraction of Jupiter's atmosphere that is helium compare to the helium fraction in the Sun's atmosphere? Explain a mechanism for removing helium from Jupiter's atmosphere.

The only true representation of the earth is a map projection.

The Pacific plate is an oceanic tectonic plate. How did a hot spot and the Pacific plate interact to form the Hawaiian Islands? A. Both the hot spot and the plate remained stationary. B. Both the hot spot and the plate continuously moved. C.

What Empire controlled most of the Middle East except for a few years between 1516 and 1917, where was the capital of this Empire located and what was the geographic extent of this Empire?

Which modern ocean basin started forming through the separation of two continents at the beginning of pangaea breakup?

Describe the forces at a divergent boundary.

What is meant by the term relative location?

Islamabad time zone october

If Planet Y orbits the Sun but does not rotate on its axis at all, how long would a day be on Planet Y? A day would be shorter than a year. A day would be exactly the same as a year. A day would be longer than a year. A day would be infinitely long.

Excessive fertilizer use on farm land can increase nitrogen and phosphorus levels in water from runoff and decrease dissolved oxygen levels. a. True b. False