Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
10 Cards in this Set
- Front
- Back
|
Astronomy
|
The study of the moon, stars, and other objects in space.
|
|
|
Axis
|
An imaginary line that passes through Earth's center and the North & South poles, about which earth rotates.
|
|
|
Rotation
|
The spinning motion of a planet on its axis. Earth's rotation takes 24 hrs.
|
|
|
Revolution
|
The movement of an object around another object. Earth's revolution around the sun takes 365.25 days.
|
|
|
Orbit
|
The path of an object as it revolves around another object.
|
|
|
Calendar
|
A system of organizing time that defines the beginning, length and divisions of a year.
|
|
|
Summer Solstice
|
The day of the year when the sun is closest distance to the North or South of the Equator. Longest day of the year.
|
|
|
Winter Solstice
|
The day of the year when the Sun is the furthest distance from North or South of the Equator. Shortest day of the year.
|
|
|
Autumnal Equinox
|
The day of the year in fall on which neither hemisphere is tilted toward or away from the sun.
|
|
|
Vernal Equinox
|
The day of the year in Spring on which neither hemisphere is tilted toward or away from the sun. First day of Spring.
|
