Exam 15: Place and Time

The Julian calendar, which has 365 days and a leap day every 4 years, was no longer used in Europe after 1582 because

The main purpose of DST is to save ______________.

A two-dimensional coordinate system is called a(n) ______________ coordinate system.

Six months of daylight at the South Pole begins when the Sun is at the

On December 21, the noonday Sun is overhead at what latitude?

The ______________ of a surface position on Earth can be defined as the angular measurement, in degrees, north or south of the equator.

The Greenwich meridian is also known as the

The elapsed time between two successive crossings of the same meridian by the Sun is known as ______________ day.

The time interval from one vernal equinox to the next is called one ______________ year.

The longest-daylight day for people in the Northern Hemisphere at latitudes greater than 25°N occurs when the noon Sun is overhead at the

The shortest-daylight day for people in the Northern Hemisphere at latitudes greater than 30°N occurs at the

The Sun is at the vernal equinox within one or two days of which of the following dates?

If Earth's axis were tilted at 30°, the daylight hours in Washington, D.C., in June would

When the Sun is on the meridian, it is by definition ______________ local solar time.

When the noonday Sun is overhead in London, England, on April 15, what are the standard time and date in San Francisco?

Which of the following is true? The number of daylight hours depends on

Some people mistakenly call noon and midnight ______________ and ______________.

It is June 21 and the Sun is to the south. Using a sextant, a ship's captain measures the altitude of the noonday Sun to be 55o. What is the latitude of the ship?

The ______________ calendar is most used around the world.

The plane of Earth's equator is tilted ______________° with respect to the plane of Earth's orbit about the Sun.