Chapter 24 Test - Earth, Moon & Sun

Earth is

• a sphere

• flat

• an oblate spheroid

• an ellipse

Earth “spinning on its axis. It takes 24 hrs for one turn.

• revolution

• precession

• rotation

An imaginary “pole” that runs through the center of the Earth from the north geographic pole to the south geographic pole.

• rotator

• axis

• magnetic pole

Earth’s orbit is ____ – not a circle

• oval

• elliptical

• ecliptical

• round

The point where Earth is closest to the sun in its orbit.

• perihelion

• aphelion

• opposition

• conjunction

Earth moves slowest when it is ____ the sun.

• farthest from

• closest to

Earth is at aphelion in what month?

• January

• March

• September

• July

Our seasons occur because___.

• Earth has an elliptical orbit

• The sun gets brighter then dimmer

• Earth's axis tilts.

Earth's ____ core is liquid iron and nickel.

• inner

• outer

• solid

Our magnetic field is formed by ____ in the liquid iron core.

• eddies

• convection currents

• explosions

• crystallization