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CAES Unit 9 Notes

Solar System

QuestionAnswer
What maintains satellites in space around the Earth? Earth's gravity
What is the pull between two objects in the universe? gravitational force
What keeps the planets in orbit around the sun? gravity
What does the moon revolve around? Earth
How long does one complete revolution of the Earth take? 1 year
What causes day and night? rotation of the Earth on its axis
Which phase of the moon is known as "half moon?" last quarter phase
The ___ is an imaginary line around the center of the Earth. equator
Earth is the only planet in the solar system that has ___. oceans
What causes the Earth to have seasons? tilt of the Earth’s axis and the revolution of the Earth around the Sun
What is the main cause of the tides on Earth? gravitational pull of the moon
When are tides the highest? during a full moon
A ___ is a natural or artificial object that revolves around the Earth. satellite
What allows astronomers to view objects in space? telescopes
Which two scientists believed the sun was at the center of the solar system? Galileo and Copernicus
What two forces combine to keep the planets in orbit? inertia and gravity
What is the tendency of a moving object to continue in a straight line? inertia
What affects the force of gravity between two objects in space? mass and distance
The ___ has the strongest gravitational pull on Earth. sun
The Earth is tilted at an angle of ___ degrees. 23.5
Which planet revolves the fastest around the sun? Mercury
What causes the sun to appear to set? rotation of the Earth
Created by: caes6science
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