SEM System 1
When the moons surface is completely visible from earth a ________ moon occurs.
Full Moon
What are periodic variations in the ocean water level called?
Tides
The presence of maria on the Moon indicates that ____.
the Moon contains lava beneath its surface.
The arrangement of waves that includes gamma rays, X-rays, ultra-violet radiation, visible light, infrared radiation, microwaves, and radio waves according to wavelength and frequency is called the...
Electromagnetic Spectrum
_________________is the material blasted out of the Moon’s surface as a result of space-object impacts.
Ejecta
When the sun, moon and earth form a straight line, a _____ occurs.
Eclipse
The phase of the Moon that proceeds (before) the new Moon is the ____.
Waning Crescent
Summer occurs on the hemisphere of Earth that is ____.
Tilted toward the sun
The telescope that uses lenses to bring visible light to a focus is a ____________ telescope.
Refracting
The theory that suggests the Moon formed as a result of a collision between Earth and a Mars-sized object is called the _____________ theory.
Impact
What movement of the earth affects the seasons?
Revolving
Dark-colored, relatively flat regions of the Moon's surface that were formed when interior lava filled large basins are called ____.
Maria
When it is winter in the northern Hemisphere, it is ______ in the Southern Hemisphere.
Summer
Telescopes are placed _______________in order to most effectively collect infrared and ultraviolet radiation,
X-rays, and gamma rays.
Above the atmosphere
One reason different seasons occur on Earth is because Earth’s __________is tilted 23.5° relative to the ecliptic.
Axis
What movement of the earth affects night and day?
Rotating
The Sun's rays strike Earth at their northernmost and southernmost positions during ____.
Summer and winter solstices
The moon revolves around the earth once every ____.
29 days
The space exploration program that landed astronauts on the Moon was...
Apollo
When the Moon waxes during its lunar cycle, the amount of its sunlight portion that we see appears to _________in size.
Increase
When the bright portion of the moon is decreasing in size each day the moon is said to be ______.
Waning
The yearly orbit of Earth around the Sun is called its ____.
Revolution
The principle force pulling an object into orbit around another object is ______.
Gravity
The Moon’s surface is very different from the surface of Earth because the Moon has no...
Erosion
A ____________ occurs when Earth passes between the Sun and Moon.
A lunar eclipse can only occur during the phase of the___________.
Lunar Eclipse
Full Moon