is the sun and all of the bodies that orbit the sun.

model, Earth and the other planets orbit the sun.

These models, which used Earth as the center, are called Earth-centered or

This apparent shift in the position of an object when viewed from different locations is known as

is a force of attraction between objects that is due to their masses and the distances between them.

is the path that a body follows as it travels around another body in space.

When an object follows an elliptical orbit around the sun, there is one point, called

where the object is farthest from the sun. There is also a point, called

The inward force that causes an object to move in a circular path is called

These larger bodies, from which planets formed, are called

is the process by which two or more low-mass atomic nuclei fuse to form another, heavier nucleus.

Dark areas that form on the surface of the sun are called

is an explosive release of energy that can extend outward as far as the sun’s outer atmosphere.

Huge loops of relatively cool gas that extend outward from the photosphere thousands of kilometers into the outer atmosphere are called

are the four small, dense, rocky planets that orbit closest to the sun.

equals the average distance between the sun and Earth, or approximately 150 million km. Therefore, Mercury lies nearly halfway between the sun and Earth.

have deep, massive gas atmospheres, which are made up mostly of hydrogen and helium.

is a disk of material that circles a planet and consists of orbiting particles.

is a celestial body that orbits the sun and is round because of its own gravity.

is a region of the solar system that begins just beyond the orbit of Neptune and contains small bodies made mostly of ice.

is any of the minor bodies in the Kuiper Belt outside the orbit of Neptune.

is a small body of ice, rock, and dust that follows a highly elliptical orbit around the sun.

is a spherical region that surrounds the solar system and extends almost halfway to the nearest star.

is a small, irregularly shaped, rocky object that orbits the sun.

A sand grain- to boulder-sized, rocky body that travels through space is a

A bright streak of light that results when a meteoroid burns up in Earth’s atmosphere is called a

is a meteoroid that reaches Earth’s surface without burning up.

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unit 3

Question	Answer
solar system	is the sun and all of the bodies that orbit the sun.
heliocentric	model, Earth and the other planets orbit the sun.
geocentric	These models, which used Earth as the center, are called Earth-centered or
parallax	This apparent shift in the position of an object when viewed from different locations is known as
gravity	is a force of attraction between objects that is due to their masses and the distances between them.
orbit	is the path that a body follows as it travels around another body in space.
aphelion	When an object follows an elliptical orbit around the sun, there is one point, called
perihelion	where the object is farthest from the sun. There is also a point, called
centripetal force	The inward force that causes an object to move in a circular path is called
solar nebula	The inward force that causes an object to move in a circular path is called
planetesimal	These larger bodies, from which planets formed, are called
nuclear fusion	is the process by which two or more low-mass atomic nuclei fuse to form another, heavier nucleus.
sunspot	Dark areas that form on the surface of the sun are called
solar flare	is an explosive release of energy that can extend outward as far as the sun’s outer atmosphere.
prominence	Huge loops of relatively cool gas that extend outward from the photosphere thousands of kilometers into the outer atmosphere are called
terrestrial planet	are the four small, dense, rocky planets that orbit closest to the sun.
astronomical unit	equals the average distance between the sun and Earth, or approximately 150 million km. Therefore, Mercury lies nearly halfway between the sun and Earth.
gas giant	have deep, massive gas atmospheres, which are made up mostly of hydrogen and helium.
planetary ring	is a disk of material that circles a planet and consists of orbiting particles.
dwarf planet	is a celestial body that orbits the sun and is round because of its own gravity.
Kuiper Belt	is a region of the solar system that begins just beyond the orbit of Neptune and contains small bodies made mostly of ice.
Kuiper Belt object	is any of the minor bodies in the Kuiper Belt outside the orbit of Neptune.

comet	is a small body of ice, rock, and dust that follows a highly elliptical orbit around the sun.
Oort cloud	is a spherical region that surrounds the solar system and extends almost halfway to the nearest star.
asteroid	is a small, irregularly shaped, rocky object that orbits the sun.
meteoroid	A sand grain- to boulder-sized, rocky body that travels through space is a
meteor	A bright streak of light that results when a meteoroid burns up in Earth’s atmosphere is called a
meteorite	is a meteoroid that reaches Earth’s surface without burning up.

Created by: Summer piazza

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