SHMS 6th Grade Science Vocab 4
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Geocentric model | (geo means Earth) Earth centered model of the known universe. The belief in ancient Greece that the stars, planets and sun revolved around the Earth which did not move. Associated with Aristotle and Ptolemy
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| Heliocentric model | (helio means sun) Sun centered model of the known universe. The planets revolve around the sun. Copernicus was 1st accredited with this model. Galileo supported it, as did Kepler and Newton.
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| Gravity | The force of attraction between all masses in the universe. It governs all motion in the solar system.
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| Comets | small objects, that orbit the sun, made mostly of ice with bits of rock and metal. They have a glowing tail that of gas and dust. It has a predictable orbit.
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| Asteroids | a small, rocky, irregularly shaped bodies that orbit fairly close to the sun.
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| Meteors | A tiny rock in space, which becomes a meteorite when it enters a planet’s atmosphere
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| Rotate | when an object spins around an axis (the Earth makes a complete rotation on its axis in 24 hours)
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| Revolve | when an object makes a complete circle around another object (It takes the Earth 365 days to go around the sun)
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| Polaris | the north star that appears to not move due to the northern point of Earth’s axis pointing in the direction of the star
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| Equator | The imaginary line that runs around the middle of Earth. This is where the most direct sunlight hits Earth.
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| Hemisphere | Either the top half of the Earth (northern), or the bottom half of the Earth (southern). The two halves are divided by the equator.
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| Solar Eclipse | This happens when the moon's shadow falls on Earth blocking out the sun's light.
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| Lunar eclipse | This happens when Earth's shadow falls on the moon blocking the moon's light.
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| Universe | All existing matter and space considered as a whole.
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| Solar System | The collection of eight planets and their moons in orbit around the sun, together with smaller bodies in the form of asteroids, meteoroids, and comets.
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| Galaxy | A system of billions of stars, gas, and dust, held together by gravitational attraction.
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| The Big Bang Theory | The theory that the universe exploded from a single point, and has been expanding ever since.
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| The Milky Way Galaxy | The spiral galaxy in which our solar system is located.
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
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To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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