The best-known feature of the Moon’s surface are the craters, which are believed to have been formed by __________.
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In about 14,000 years, the North Pole of the Earth’s axis wi…
In about 14,000 years, the North Pole of the Earth’s axis will be pointing towards which star?
When one travels east while passing over a time zone boundar…
When one travels east while passing over a time zone boundary (ignoring daylight savings time issues),
A lunar eclipse can occur only when the Moon is in or near t…
A lunar eclipse can occur only when the Moon is in or near the ___________ phase.
The slow, 25,800-year rotation of Earth’s axis is called
The slow, 25,800-year rotation of Earth’s axis is called
The natural sciences are divided into ______________ science…
The natural sciences are divided into ______________ sciences and biological sciences.
Which is larger, a liter or a quart?
Which is larger, a liter or a quart?
The four seasons – spring, summer, fall, and winter – are ca…
The four seasons – spring, summer, fall, and winter – are caused by the Sun’s changing its daily altitude over a period of 1 year. The Sun’s altitude changes
The planet with the largest swing in temperature between nig…
The planet with the largest swing in temperature between night and day is
The number of daylight hours at 40°S is greatest during the…
The number of daylight hours at 40°S is greatest during the month of