Which occurrence is associated with the demise of the dinosaurs?

Geologists have principally used which class of rocks for radiometric dating?

Prominent groups of stars in the night sky that appear to an Earth observer as distinct patterns are called __________.

Atmospheric pressure may be measured in units of __________.

The four planets closest to the Sun, including Earth, are classified as __________ planets, while the four “gas giants” are classified as __________ planets.

Ocean __________ are due to the gravitational attraction that the Sun and Moon, mainly the Moon, exert on the Earth.

In 2006, the International Astronomical Union (IAU) introduced a new classification for small solar-system bodies that are not satellites but orbit the Sun called __________, and placed Pluto, along with several other such bodies, in that category.

The planet Jupiter has the largest moon (Ganymede) and the most moons (67 known) of any planet in the solar system. Most moons are small, but of the 181 known moons in the solar system, Earth’s moon is larger than all but __________ other moons and is even larger than Pluto.

This planet has the largest known volcano in the solar system, Olympus Mons.

All planets in our solar system __________ counterclockwise around the Sun while each also __________ on its own axis.