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8th Earth in Space
8th Grade Earth in Space TEST Review
Term | Definition |
---|---|
Away | The moon moves ______ from the sun when it's waxing |
Solar Eclipse | An event when the moon passes between the Earth and the Sun |
Tides | Water bulges on the Earth's surface due mostly to the moon's gravity |
Solstice | The longest or shortest day of the year |
June | The month when the Southern hemisphere's Winter Solstice takes place |
Terminator | The line that separates day time from night time |
Rotation | The Earth experiences day and night because of the earth's ___ |
Waning Gibbous | A moon phase in which most of the moon is lit up and the bright side is on the left |
Waxing | Moon phases in which the bright side is on the right side & the moon appears to be growing larger each night |
Seven | The approximate # of days it takes for the moon to complete 1 |
Neap tides | When the tidal range between high and low tides is small |
Phases | The different appearances of the moon are called _________ |
Axis | The Earth rotates around it's ______ once every 24 hours |
Full Moon | The moon phase when a lunar eclipse can occur |
Equinox | The event in which the daytime hours are equal to night time hours in both hemispheres |
Last Quarter | Moon phase in which half of the moon is lit and the dark side is on the right side |
Tilted | The Earth experiences different seasons because it orbits the Sun and because it is _________ |
Spring Tides | The event that occurs at full and New moon phases |
Waning | Moon phases in which the bright side of the moon is on its left side & the moon moves towards the Sun |
Revolution | The Earth makes one of these around the sun every 365 days |
Waning Crescent | The moon phase that occurs 14 days after a Waxing Gibbous moon. |
twenty Five | the percentage of the moons orbit that is covered in 7 days |
New Moon | The moon phase that would occur three weeks after a 1st quarter moon |
spinning | Another name for rotation |
Orbit | Another name for revolution |
Expanding | The Big Bang theory tells us that the universe has been and still is __________ |
Nebula | A large cloud of dust and gas that becomes a star |
Nuclear Fusion | The way stars produce energy |
Milky Way | The galaxy in which our solar system exists |
Andromeda | What is the closest spiral galaxy to our galaxy |
Temperature | A physical property that is part of the basis for the HR Diagram |
Spiral | The Milky Way galaxy is this type of galaxy |
Event Horizon | The edge of a black hole |
Constellations | Patterns of stars in the sky |
Redshift | Evidence that the universe is expanding |
Main Sequence | Our sun is this type of star |
Clouds of Magellan | Two irregular galaxies that orbit our galaxy |
Electromagnetic _______ | waves can move through the vacuum of space |
Light years | Extremely large distances in space |
Universe | Something that is approximately 12 to 14 billion years old |
Yellow | The color of a medium temperature star |
Red Giant | A star that has used up all of its hydrogen becomes larger and cooler |
Gamma rays | The highest energy waves that come from stars |
Luminosity | Another expression that means brightness |
Irregular | The type of galaxy that is the smallest |
Distance | What is measured by light-years |
Parallax | Changing star location by earth's movement which allows us to calculate how far away they are |
cool | The temperature of orange and red colored stars |
Galaxy | A large group of stars held together by gravity |
Black Hole | One possible result after a star goes supernova |
White Dwarf | After a Red Giant star collapses slowly the very hot tiny dense star that remains |
Steady state Theory | Theory that the universe was and always has been as it is now |
Super nova | Giant stars that collapse quickly and explode out |
Red | Color with the longest wavelength |
Blue Shift | The change in light that is getting closer |