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14 Cards in this Set

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What is gravitational attraction?
The forces of attraction between two objects.
What affects gravitational attraction?
The mass of the objects and the distance between them.
What are the two types ofmaterials that planets in our solar system are made up of?
A. Dense, rocky material
B. Thick atmosphere of gasses and small solid core.
What is our solar system part of?
The planet is part of the solar system which is part of a galaxy which is part of the universe.
What causes night and day?
The rotation of Earth on its axis.
What are the solstices?
Summer: June 20, the longest day of the year, when the North pole is pointed most directly toward the Sun.
Winter: December 20, The shortest day of the year, when the south pole is pointed most directly towards the Sun.
What does the sun look like at noon on each of the solstices?
Summer Solstice: Highest in the sky
Winter solstice: Lowest in the sky
What is an Equinox?
Spring Equinox: March 21.
Fall Equinox: September 21.
This is when we experience equal days and nights.. Neither of the poles are pointed directly at the sun.
How much Daylight do we experience on the Equinoxes?
Equal days and equal nights.
How do stars move in the sky?
From East to West.
What causes the phases of the moon?
The position of the moon relative to the Earth and Sun.
Where is the moon in relation to the Earth and Sun during the stages of the moon?
See diagram
What determines the length of our Earth year?
The amount of time it takes Earth to revolve around the Sun once.
Why are summer days hotter than winter days in Rhode Island?
During the summer, RI recieves more direct rays from the Sun. This is because Earth is tilted 23.5 degrees on its axis.