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;
18 Cards in this Set
- Front
- Back
|
rotation
|
is a motion in which every part of an object is moving in a circular path around a central line. The earth rotates every 24 hours on its central line (axis of rotation)
|
|
|
Foucault Pendulum
|
proves that the Earth is actually rotating
|
|
|
axis
|
the axis is an imaginary line that runs through the poles of the earth from the North Pole to the South Pole and is tilted 23 1/2 degrees
|
|
|
eccentricity
|
flatness of an ellipse
|
|
|
Coriolis Effect
|
Fluids move in a curved path
|
|
|
revolution
|
Revolving or turning around on a axis, takes 365 1/4 days
|
|
|
precession
|
The very slow change in the direction of the Earth's axis of rotation
|
|
|
Solstice
|
sun stop
|
|
|
Equinox
|
an equal amount of daylight and darkness
|
|
|
Waning
|
getting smaller
|
|
|
Solar eclipse
|
when the moon passes directly between the Earth and the Sun
|
|
|
Umbra
|
a region of shadow in which all of the light has been blocked
|
|
|
Penumbra
|
when only part of the light is blocked
|
|
|
Lunar eclipse
|
when the full moon moves through the shadow of the Earth
|
|
|
Waxing
|
getting bigger
|
|
|
Spring tide
|
tides that "spring" very high
|
|
|
Neap tide
|
when there is very little difference between high and low tide
|
|
|
Oblate spheroid
|
when the Earth is slightly flattened at the poles and bulging at the equator
|
