| A | B |
|---|
| What ancient astronomer developed a geocentric model of the universe explaining the observable motions of the planets? | Kepler or Ptolemy |
| The first accurate measurement of the size of Earth was made by | Erastothenes |
| Hipparchus was best known for his | star chart (or catalog) |
| The apparent westward movement of a planet against the background of stars is called | retrograde motion |
| The geocentric model of the universe stated that the _____ was the center of the universe. | Earth was the center of the universe. |
| One astronomical unit (AU) averages about ________. | 150 million kilometeres |
| Using Tycho Brahe's data, which scientist proposed three laws of planetary motion? | Kepler |
| The first early astronomer to propose a sun-centered solar system was ________. | Copernicus |
| What is the shape of a planet's orbit? | elliptical (or ellipse) |
| Which scientist was the first to use the telescope in astronomy? | Galileo |
| The true shape of planetary orbits was discovered by _______. | Kepler |
| Earth is closest to the sun at a point called ________. | perihelion |
| The turning or spinning of a body on its axis is known as ________. | rotation |
| The moon is closest to Earth at ______. | apogee |
| During the period that the moon's phases are changing from new to full, the moon is _________. | waxing |
| What occures when the moon casts its shadow on Earth? | solar eclipse |
| What must happen for a solar eclipse to occur? | moon must pass between Earth and Sun |
| Round depressions on the moon's surface are called __________. | craters |
| Maria on the moon formed from what material? | solidified lava |
| The motion of a body, such as a planet or moon, along a path around some point in space is called _________. | revolution |
| What occurs when the Earth is directly between the moon and the Sun? | lunar eclipse |
| When the size of the visible portion of the moon is increasing it is said to be _________. | waxing |
| _________ are caused by the gravitational pull of the moon with respect to the Earth. | tides |
| When the size of the visible portion of the moon is decreasing it is said to be _______. | waning |
| The time it takes for Earth to make one complete complete rotation (360) is known as ___________. | sidereal day |
| The model of the universe with the Sun in the center is the ________ model. | heliocentric |
| Which astronomer developed the laws of gravitation? | Newton |
| At which phase is one half of the moon completely visible? | full moon |
| At which phase is no lighted area of the moon visible from the Earth? | new moon |
| The "first" astronomers were thought to be ________. | Greek |
