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Unit 9 Vocabulary Earth Cycles (22 Words). AXIS is: Imaginary line that cuts through the center of a planet , such as Earth , that the planet spins around. AXIS is: . REVOLVE is:

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Unit 9 Vocabulary

Earth Cycles

(22 Words)


AXIS is:

Imaginary line that cuts through the center of a planet , such as Earth , that the planet spins around



REVOLVE is:

(Revolution) one orbit of an object in space around another object in space, such as the moon around the Earth or Earth around the sun.



Rotate (Rotation)

is:

spinning of a planet,

moon, sun or other

object, around its axis


Rotateis:

rotate


GRAVITATIONAL ATTRACTION is:

the force of attraction between all masses in the universe; especially the attraction of the

Earth's mass for bodies near its surface



ECLIPSE is:

When one solar system object

passes between the Sun and

another object, casting

a shadow



EQUINOX is:

One of two days in the year

when the hours of daylight

equal the hours of darkness

over Earth as a whole

Vernal Equinox – marks the beginning of spring

Autumnal equinox -marks the beginning of autumn or fall



SOLSTICE is:

One of two days in the year

when hours of daylight and

hours of darkness are their

greatest and least.

Summer solstice -marks the beginning of summer and the longest period of daylight

Winter solstice -marks the beginning of winter and the shortest period of daylight



TERMINATORis:

The edge of the shadow

between day and night

on the Earth and moon



WAXING is:

Moon phases from new

moon to full moon, as the

lit surface seen from Earth

grows larger



WANING is:

Moon phases from full moon

to new moon, as the lit surface

seen from Earth grows smaller



GIBBOUS is:

When the moon is more

than half but less than

fully illuminated



CRESCENT is:

The Moon appears to be

partly but less than one-half

illuminated by direct

sunlight – looks like a sliver.


CRESCENT is:

WANING CRESCENT

WAXING CRESCENT


NEW MOON is:

The moon’s unilluminated

side is facing the Earth.

The moon is not visible

(except during a solar eclipse)


NEW MOON is:

Only visible during a solar eclipse


FULL MOON is:

The Moon's illuminated side

is facing the Earth. The Moon

appears to be completely

illuminated by direct sunlight.



SOLAR ECLIPSE is:

Occurs when the moon

passes between Earth and

the sun, blocking the sun’s

light from Earth



LUNAR ECLIPSE is:

Occurs when the moon

passes behind the Earth

so that the Earth blocks the

Sun’s rays from striking the

moon



FIRST QUARTER is:

One-half of the moon appears

to be illuminated by direct

sunlight. The right half of the

moon appears lighted and

the left side of the moon

appears dark.



LAST QUARTER is:

One-half of the moon appears

to be illuminated by direct

sunlight. The left half of the

moon appears lighted and

the right side of the moon

appears dark.



NEAP TIDE is:

tides that are least extreme;

happen twice a month, at first

and last quarter moon phases



SPRING TIDE is:

Tides that are most extreme

occur twice a month, at full and

new moon phases



HIGH TIDE is:

tide when it is at its highest

level at a particular time and

place, takes place when the

moon and sun are directly

aligned with respect to the

Earth.



LOW TIDE is:

Tide at its lowest level at a

particular time and place.

Lowest tides are reached

when moon and sun are

directly aligned with respect

to the Earth.



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