Vocabulary Test: Unit 9 – Earth, Sun, Moon System

Front

Gravity

Back

a force of attraction between objects due to their masses.

Front

Season

Back

determined by both Earth’s tilt relative to the Sun and Earth’s position in its orbit

Front

Revolution

Back

the motion of one object around another object

Front

Rotation

Back

the turning of an object on its axis

Front

Satellite

Back

a natural or artificial body that revolves around a planet

Front

Equinox

Back

the moment when the Sun is directly above the equator: day and night lengths are equal

Front

Prominence

Back

a loop of relatively cool, incandescent gas that extends above the photosphere of the Sun and above the Sun’s edge as seen from Earth

Front

Solar flare

Back

an explosive release of energy that comes from the Sun and that is associated with magnetic disturbances on the Sun’s surface

Front

Solstice

Back

the point at which the Sun is as far north or as far South of the equator as possible: shortest and longest days of the year

Front

Sunspot

Back

a dark area on the photosphere of the Sun that is cooler than the surrounding areas and that has a strong magnetic field