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;
14 Cards in this Set
- Front
- Back
|
Apogee
|
The point in a satelitte's elliptical orbit farthest from the center of the earth.
|
|
|
Escape Speed
|
The minimum speed necessary for an object to escape permanently from a gravitational field that holds it.
|
|
|
Gravitational Field
|
A force field that exists in the space around every mass or group of masses.
|
|
|
Perigee
|
The point in a satellitte's elliptical orbit where it is nearest to the center of the earth.
|
|
|
Spring Tide
|
- high or low tide that occurs when sun, earth, moon are lined up so the tides due to the earth and the sun coincide
|
|
|
Black Hole
|
A mass that has collapsed to so great a density that its enormous local gravitational field prevents light from escaping.
|
|
|
Focus
|
ellipse- one of the two points for which the sum of the distances to any point on an ellipse is constant.
|
|
|
Lunar Eclipse
|
the cutoff of light from the full moon when the earth is directly between the sun and moon, so the earth's shadow is cast on the moon
|
|
|
Period
|
- time required for a complet orbit
|
|
|
Weightlessness
|
-condition of free fall toward or around the earth, in which an object experiencesno support force
|
|
|
Ellipse
|
an oval-shaped curve that is the path of a point that moves such that the sum of its distances from two fixed points is constant
|
|
|
Force Field
|
that which exists in the space surroundng a mass, so that another mass will experience a force
|
|
|
Neap Tide
|
a tide that occurs when the moon is halfway between a new and full moon. tides due to sun and moon cancel
|
|
|
Solar Eclipse
|
the cutoff of light from the sun to an observer on the earth when the moon is directly between the sun and the earth
|
