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Sun-Earth-Moon

QuestionAnswer
What is the Geocentric Theory of the Solar System? Earth was the center and all planets & Sun obrited around it.
What is the Heliocentric Theory of the solar system? Sun is the center and all planets revolve around it.
What is the Big Bang Theory? an explosion created the universe and all energy, matter, and space began in an instant.
What is astronomy? the study of extraterrestrial objects and phenomena
What is an AU? Astronomical Unit, measurement of the distance from Earth to the Sun.
What is measured in AU's? objects within our solar system
What is a light year? the distance light travels in one year. 6 trillion miles
What is measured in light years? objects outside of our solar system
What is gravity? the force pulling objects toward each other; force pulling toward the center of the Earth
What is inertia? objects resistance to change in motion
What two factors determine the force of gravity between two objects? Mass and Distance between the objects
How does distance affect the force of gravity? shorter distance = greater force longer distance = less force
What keeps Earth in orbit around the Sun? The BALANCE of the gravitational pull of the Sun and Inertia
How does mass change on the moon? Mass does not change
What motion causes day and night? ROTATION of the Earth on its axis
What causes the seasons to change? the tilt of the Earth and REVOLUTION around the sun
What is the shape of Earth's orbit? Elliptical
How does earth revolve around the Sun? counterclockwise on a tilt
How long is one ROTATION? 24 hours
How long is earth's revolution around the Sun? 365.24 days
What is a solstice? A day when Earth's rotation is most toward or most away from the Sun
What is an equinox? A day when Earth's rotation axis is leaning along its orbit
When are the solstice? Winter = Dec 21 or 22 Summer = June 21 or 22
When are the Equinox? Spring = March 20 or 21 Fall = September 22 or 23
How does the sun get its energy? Nuclear Fusion
What is nuclear fusion? Hydrogen atoms join together to form helium.
How hot is the core of the Sun? 15 million degrees Celsius
What are the layers of the sun's atmosphere? Photosphere, Chromosphere, Corona
What are areas of gas on the sun that are cooler than gases around them? Sunspots
What are the reddish loops of gas? Prominences
What are explosion of gases into space? Solar Flares
Which layer of the Sun makes light? Photosphere
Which layer of the Sun glows color? Chromosphere
Which layer of the sun send out a stream of electrically charge particles? Corona
Why can we see the Moon? it reflects light from the Sun
What is the Impact Theory? An object the size of Mars collided with Earth. Ejected rock formed a ring around earth and slowly cooled and clumped together because of gravity
What are 3 features on the Moon? Craters, Highlands, Maria
What are Maria? large, dark areas formed from lava that flowed to the surface and became solid
How long is the moons rotation? 27.3 days
How long does it take the Moon to revolve around Earth? 27.3 days
Why do we only see ONE side of the Moon? The moon's rotation and revolution is the same
What causes seasons? the tilt of earth on its axis and the revolution around the Sun
What is the position of Earth during Summer? The northern hemisphere is tilted TOWARD the Sun
What causes tides on Earth? the gravitational pull of the Moon on opposite sides of the earth
Which type of tide occurs during a full moon and new moon? Spring tide
What is the daily rise and fall of sea level? tide
When do high tides occur? At tidal bulges
When is the Sun the highest in the sky? near the June Solstice
What is the positions of objects during a Solar Eclipse? Sun - Moon - Earth
What is an umbra? dark, smaller shadow during an eclipse
What is the penumbra? broader, lighter shadow during an eclipse
Which type of eclipse occurs more often? Lunar
Which moon phase occurs during Solar eclipse? New Moon
Which moon phase occurs during a lunar eclipse? Full Moon
*Be able to label parts of eclipses *Be able to label and/or illustrate all the phases of the moon *Be able to read an H-R diagram *Be able to label the parts of the Sun
Created by: 8BROCKS on 2014-03-27



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