The force that pulls objects toward each other; it keeps the planets orbiting the Sun and the Moon orbiting Earth.

The phase of the Moon when the whole side facing Earth is lit up by the Sun.

The highest high tides and lowest low tides that happen when the Sun, Moon, and Earth are in a straight line (during new and full moons).

The daily rise and fall of ocean water caused by the Moon’s (and partly the Sun’s) gravity pulling on Earth’s oceans.

The amount of time between most high tides and low tides; there are usually two high and two low tides each day.

Kepler’s 2nd Law (Law of Areas)

Says that an imaginary line connecting a planet to the Sun sweeps out equal areas in equal time intervals. This means a planet moves faster when it is closer to the Sun and slower when it is farther away

Kepler’s 3rd Law (Law of Periods)

Planets that are farther from the Sun take longer to orbit it than planets that are closer. The semi major axis (average distance to star) of an orbit is proportional to the period of revolution.

The movement of one object around another; for example, Earth’s revolution around the Sun takes one year, Moon's revolution around Earth takes a month etc.

An oval-shaped path; planets move in elliptical orbits with the Sun at one foci (center point).

When the Moon passes between the Earth and the Sun, blocking the Sun’s light and casting a shadow on Earth.

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Orbits/Moon

Term	Definition
Gravity	The force that pulls objects toward each other; it keeps the planets orbiting the Sun and the Moon orbiting Earth.
Full Moon	The phase of the Moon when the whole side facing Earth is lit up by the Sun.
Spring Tide	The highest high tides and lowest low tides that happen when the Sun, Moon, and Earth are in a straight line (during new and full moons).
Tides	The daily rise and fall of ocean water caused by the Moon’s (and partly the Sun’s) gravity pulling on Earth’s oceans.
12 Hours	The amount of time between most high tides and low tides; there are usually two high and two low tides each day.
Kepler’s 2nd Law (Law of Areas)	Says that an imaginary line connecting a planet to the Sun sweeps out equal areas in equal time intervals. This means a planet moves faster when it is closer to the Sun and slower when it is farther away
Kepler’s 3rd Law (Law of Periods)	Planets that are farther from the Sun take longer to orbit it than planets that are closer. The semi major axis (average distance to star) of an orbit is proportional to the period of revolution.
Revolution	The movement of one object around another; for example, Earth’s revolution around the Sun takes one year, Moon's revolution around Earth takes a month etc.
Ellipse	An oval-shaped path; planets move in elliptical orbits with the Sun at one foci (center point).
Solar Eclipse	When the Moon passes between the Earth and the Sun, blocking the Sun’s light and casting a shadow on Earth.

Created by: vsimonetti

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