1.
Vernal Equinox
2.
Solar Eclipse
3.
Satellite
4.
Waxing
5.
Summer Solstice
6.
Tide
7.
Spring Tide
8.
Solstice
9.
Waning
a.
The time of the year when the Sun appears farthest north or south of the equator. The solstices mark the beginning of the Summer and Winter seasons.
b.
The cyclic rise and fall in sea level due to the gravitational forces among the Earth, Moon, and Sun.
c.
One of two days of the year when the Sun’s radiation crosses directly above Earth’s equator. This day generally occurs on March 21st of every year, and the number of daylight and nighttime hours are equal.
d.
When an object appears to gradually decrease in size because of the changing shadows of other objects in space.
e.
The time of year when the Sun is farthest north from Earth’s equator. The summer solstice marks the beginning of Summer and occurs annually approximately on June 21st.
f.
A phenomenon that occurs when the moon is positioned directly between the Sun and Earth, and Earth passes into the shadow of the Moon.
g.
A natural or artificial body in orbit around a planet. The Moon is a natural satellite of Earth, and Earth is a natural satellite of the Sun.
h.
A tide that occurs when the Moon, Earth, and Sun line up in space;high tides are higher than usual, and low tides are lower than usual.
i.
When an object appears to gradually increase in size because of the changing shadows of other objects in space.
2.
Match each vocabulary word to the correct definition.
1.
Revolution
2.
Maria
3.
Neap Tide
4.
Rotation
5.
Lunar Eclipse
6.
Lunar Cycle
7.
Pariapsis
8.
Heliocentric Model
9.
Lunar Phases
10.
Lunar Month
a.
The motion of one body in space, circling or orbiting another body in space. Any object that revolves around another object in space is known as a satellite.
b.
The point in the orbit of a satellite when it is closest to the object that it is revolving around.
c.
The interval of a complete cycle between one new Moon and the next. The lunar cycle is also equal to the lunar month of 29.5 days in length.
d.
The average time between successive new or full moons. A lunar month is equal to approximately 29.5 days. The completion of one lunar month is called a lunar cycle.
e.
The apparent change in the shape of the Moon as seen from Earth as it moves in orbit.
f.
The spin of a celestial object on its axis.
g.
The model indicating that the Sun is the center of the solar system, and it is Earth and other planets that revolve around the Sun. Nicolaus Copernicus was the first person known to propose the heliocentric model
h.
Basins on the moon that are filled with lava after craters are formed; appear as varying intensities of grey color.
i.
A phenomenon that occurs when Earth is directly between the Sun and the Moon, and the Moon passes into the shadow of Earth.
j.
A tide that occurs when the Sun, Earth, and Moon are positioned to form a right triangle in space; high tides are lower than normal, while low tides are higher than normal.
3.
Match each vocabulary word to the correct definition
1.
Axis
2.
Gibbous
3.
Gravity
4.
Apoapsis
5.
Ellipse
6.
Eclipse
7.
Corona
8.
Equinox
9.
Autumnal Equinox
10.
Geocentric Model
a.
An imaginary line through the center of rotation of an object. The Earth’s axis is tilted at 23.5 degrees.
b.
One of two days of the year when the Sun’s radiation crosses directly above Earth’s equator. This day generally occurs on September 23rd of each year, and the number of daylight and nighttime hours are equal.
c.
The model indicating that Earth is the center of the solar system, and it is the sun, stars, and other planets that revolve around Earth.
d.
A mutual physical force of nature that causes two bodies to attract each other. Gravitational force increases with mass and close distances.
e.
An oval shape in which Earth orbits the Sun and the Moon orbits Earth.
f.
The point in the orbit of a satellite when it is farthest from the object that it is revolving around.
g.
The two points at which the Sun’s radiation crosses directly above Earth’s equator in its yearly path in the sky. During an equinox, there are equal amounts of daytime hours and nighttime hours.
h.
The total or partial blocking of one object in space by another.
i.
The outer part of the Sun’s atmosphere. The corona is visible from Earth during a total solar eclipse. It is the bright glow seen in most solar eclipse photos.
j.
A mutual physical force of nature that causes two bodies to attract each other. Gravitational force increases with mass and close distances.