Changes in daylength and the Sun's altitude above the horizon over the course of the year
A) produce Earth's rotation.
B) are phenomena that occur only at the equator.
C) are responsible for the seasons.
D) are factors that follow an irregular, random cycle.
Question 2
Which of the following is correct regarding mean sea level?
A) A consistent value has yet to be determined due to all the variables involved in producing the tides.
B) It is at the same level along the entire North American coast.
C) It is calculated based on average tidal levels recorded hourly at a given site over a period of many years.
D) It has very little variability across all ocean basins and, therefore, is treated as an absolute value.
Oasis in space: earthrise over the moon's horizon.
SpaceShipOne completed the first manned private spaceflight in 2004, reaching an altitude of 100.124
U.S. Life Expectancy by Year of Birth
Overfished per year
Estimated number of new HIV infections per year over time period in Canada
Kindergarten school year book