Earth's Motion
The Moon
Solar System & Planets
Stars and Galaxies
Space Exploration
100
The Sun has a diameter that is how many times larger than the Earth?
100X
100
The Moon seems to shine because it ______________ the sunlight.
reflects
100
Known as the Earth-centered model early Greeks though planets, the Moon and stars rotated around the Earth.
geocentric model
100
Ancient Greeks, Romans and other early cultures observed patterns of stars in the night sky. What were these pattern called?
Constellations
100
These use light to produce magnified images.
optical telescopes
200
The Earth orbits or follows a path, around the Sun making one complete revolution every ______ days.
365.24
200
The gravitational pull of ___________ on the Moon causes the Moon to move in an orbit around the Earth.
Earth
200
These units measure distances among the objects in the solar system.
astronomical units
200
A star is born when this happens.
Nuclear fusion begins
200
This was the first optical space reflecting telescope that orbits Earth.
Hubble Telescope
300
A small part of the Sun’s energy reaches Earth as these two energies.
Heat (thermal) and Light energy
300
New Moon, 8
300
Astronomers believe that the solar system began these many years ago.
4.6 billion years ago (bya)
300
This type of galaxy has bulge in middle and arms spiral outward; Milky Way.
spiral galaxy
300
These help launch objects into space by propelling itself by ejecting exhaust gas from one end.
rockets
400
The tilt of Earth’s rotation axis, combined with Earth’s motion around the Sun causes the _______________ to change.
seasons
400
When the moon’s shadow appears on the Earth’s surface.
solar eclipse
400
Planet that has a huge storm known as the Great Red Spot.
Jupiter
400
How many stars are needed to form a star system?
Two or more stars
400
These are uncrewed spacecraft sent from Earth to explore objects in space.
space probes
500
This occurs when the Earth’s rotation axis is the most toward or away from the Sun. This situation marks the start of what two seasons?
solstice, winter and summer
500
These are dark, flat areas formed on the Moon from lava 3-4 billion years ago.
maria
500
Seventh planet from Sun; large and gaseous. Methane in atmosphere gives planet it blue-green color. Has tilted axis of rotation moving around Sun like a rolling ball.
Uranus
500
This states that the universe probably began about 13.7 billion years ago with an enormous explosion – galaxies still expanding from explosion.
Big Bang Theory
500
These are reusable spacecraft that transport people and materials to and from space.
Space shuttle