Earth Motions

The spinning of the Earth on its axis is

• rotation
• revolution
• precession
• nutation

A mean solar day is

• A day when the sun emits a lot of dangerous particles
• The average time taken for Earth to rotate on its axis:  24 hours
• The time needed for the moon to orbit the Earth:  24 hours and 50 minutes
• The time taken for the Earth to go once around the Sun

The motion where the Earth's axis tilt traces a cone pattern once every 26,000 years is called

• rotation
• revolution
• precession
• nutation

The center point of the orbits of two revolving objects is called the

• focus
• barycenter
• nutation
• ellipse

The Earth's motion around the Sun is called its

• rotation
• revolution
• precession
• nutation

The shape of the Earth's orbit around the Sun (really around its barycenter with the Sun) is a(n)

• circle
• cone
• ellipse
• figure-8

The Sun is

• smaller than the Earth
• about the same size as the Earth
• four or five times as big as the Earth
• amillion times as big as than the Earth

Eccentricity is

• How fast a planet orbits
• How squashed an ellipse is
• How far the barycenter is from the Sun
• How high the tides are

The balancing point of the solar system is the

• barycenter
• Sun
• focus
• equinox

Centrifugal force causes

• a slight bulging at the poles and a slight squshishing at the equator
• a slight bulging at the equator and a slight squishing at the poles
• ( ͡° ͜ʖ ͡°)