Vocab P.1
Movement of one object in an orbit around another.
revolution
Different shapes the moon seems to have when viewed from Earth.
Phases
Path an object follows as it revolves around another object.
Copernicus proposed a model of the solar system in which ___
A.) Earth is the center of the universe.
B.) Earth revolves around the sun.
C.) the moon revolves around the sun.
D.) the sun is the center of the universe.
B.) Earth revolves around the sun.
Seasonal changes on Earth are cause by ____
A.) Earth's distance from the sun.
B.) Earth's axial tilt.
C.) Earth's speed of rotation.
D.) the cycles of the sun.
B.) Earth's axial tilt
Chunk on rock and metal that orbits the sun.
Asteroid
Turning of an object on its axis.
rotation
Oval path.
Ellipse
What enabled Galileo to observe the planets and prove that Copernicus was correct?
A.) Microscope
B.) Stethoscope
C.) Telescope
D.) Oscilloscope
C.) Telescope
Over thousands of years, the North Star changes because of _____
A.) the wobble of Earth's axis.
B.) the rotation of Earth's orbit.
C.) Earth's revolution.
D.) Earth's elliptical orbit.
A.) the wobble of Earth's axis.
Phase in which half the moon's lit side is visible after the waning gibbous moon.
Third quarter
Chunk of rock that orbits the sun and is smaller than an asteroid.
Meteoroid
Period of the year with a certain level of temperature and type of weather.
Season
There are ______ planets and more than ______ moons in the solar system.
A.) 8, 60
B.) 9, 60
C.) 12, 50
D.) 14, 50
A.) 8, 60
It is warmer in summer than in winter because in summer _____
A.) The part of Earth having summer is tilted away from the sun.
B.) the part of Earth having summer is tilted neither toward not away from the sun.
C.) the part of Earth having summer is tilted toward the sun.
D.) Earth is closer to the sun.
C.) the part of Earth having summer is tilted toward the sun.
Ball of ice, rock, and frozen gases that orbits the sun.
Comet
Angle of a planet's axis from vertical.
Axial Tilt
Imaginary line through Earth's center, from the North Pole to the South Pole.
Axis
A.) Light-year
B.) Kilometer
C.) Astronomical unit
D.) Mile
A.) Light-year
Venus and Mercury do not have seasons because ____
A.) they have the largest axial tilts in the solar system.
B.) they are very far away from the sun.
C.) they have the smallest axial tilts in the solar system.
D.) they are very close to the sun.
C.) they have the smallest axial tilts in the solar system.
Measurement equal to the distance between Earth and the sun.
Astronomical unit
System of planets revolving around a star.
Planetary system
Phase in which half the moon's lit side is visible after the waxing crescent.
First quarter
Daytime on each planet lasts for different amounts of time because each planet ____
A.) orbits at a different distance from the sun.
B.) orbits at a different distance from Earth.
C.) has a differently shaped orbit.
D.) has a different period of rotation.
D.) has a different period of rotation.
The sun seems to rise and set because of Earth's ____
A.) cycle.
B.) precession.
C.) rotation.
D.) axial tilt.
C.) rotation.