An imaginary line around which the Earth rotates that passes from North Pole to South Pole through Earth’s center.

• Axis
• Orbit
• Tilt
• All of These

Force of attraction between any two objects; pull towards the center of mass

• Gravity
• Orbit
• Universe
• All of These

Path an object follows as it revolves around another object; i.e., Earth “orbits” the Sun

• Orbit
• Rover
• Rocket
• None of These

Orbiting of one object around another

• Revolution
• Rotation
• Axis
• Tilt

Spinning of an object around its axis

• Rotation
• Revolution
• Orbit
• Seasons

4 divisions of one Earth year marked by particular weather patterns resulting from Earth’s revolution around the Sun and the tilt of its axis

• Seasons
• Rotation
• Revolution
• Orbit

Angle between axis and the perpendicular to the orbital plane; for Earth, 23.5⁰

• Tilt
• Orbit
• Revolution
• All of These

Phase of the Moon as seen from Earth between New and 1st Quarter; crescent shape of light

• Crescent Moon
• Full Moon
• Gibbous Moon
• New Moon

When one object blocks the light of another object from reaching a third object

• Eclipse
• Equinox
• Tilt
• Seasons

The time of year when the Sun is directly over the equator; occurs in the spring (vernal) on March 21/22 and in the fall (autumnal) on September 22/23; means equal day and night

• Equinox
• Eclipse
• Spring Tide
• Neap Tide