Science Chapter 8 Word Scramble

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Question	Answer
The _____ in the solar system orbit the Sun.	Planets
The sun and the objects that orbit it make up the ________	Solar system
The largest object in the solar system is the _____	Sun
The Sun is a star made up mostly of ________ gas	hydrogen
_________ produces enormous amounts of energy in the Sun	nuclear fusion
Objects orbit the Sun because it applies __________ forces on them	Gravitational
Objects that orbit the Sun include planets, dwarf planets, asteroids, and ______. These objects ______ the Suns light.	Comets, reflects
A planet has nearly ______ shape.	spherical
The mass of a planet is much _____ than the mass of the nearby planets	larger
These are ____ planets in the solar system	eight
The four planets closet to the Sun are called the ______	inner planets
Inner planets are made from mainly from _____ materials	rocky
The four planets farthest from the Sun are called the ______ planets	outer
Outer Planets are made mostly of ice and ____	gases
Because the outer planets are much larger than the inner planets, they are sometimes called ______	gas giants
A ______ is a spherical object that orbits the Sun, is not the moon or another planet, has less mass than any of the eight planets	Dwarf Planet
Millions of small, rocky objects called ______ orbit the Sun in a belt between Mars and Jupiter	Asteroids
A ____ orbits the Sun in an oval- shaped orbit and is made of dust, gas and ice	Comet
The ___________ is used to measure long distance in the solar system	astronomical unit
One astronomical unit (AU) is the average distance from Earth to the _________	Sun
One way an object in the solar system moves is by orbiting, or _______ around another object	revolving
The amount of time it takes an object to revolve once around the Sun is its ___________	period of revolution
Objects in the solar system also spin or _______	rotate
The time it takes an object to rotate once is its ____________	period of rotation
The shape of a planets orbit is a _______ which is a stretched out circle	ellipse
The sun is at one of the ______ of the ellipse, so the distance between a planet and the Sun changed as the planet moves	foci
A planet moves ____ when it is close to the Sun than when it is farther away	Faster
A dwarf planet is a sphere that orbits an _____	Sun
A dwarf planet has objects similar in _____ orbital near it or crossing its orbital path	mass
The dwarf planets in the solar system are _______, Ceres, Eris, Make-make and Haumea.	Pluto
Ceres is located in the _______ belt. It is the ________ dwarf planet in the solar system	asteroid-smallest
Pluto has a rocky core surrounded by _____. It has ______ known moons.	ice
_______ is the largest dwarf planet. It is three times farther from the Sun than the dwarf planet ________ is.	Eris- Pluto
Make make and Haumea are dwarf planets in the _________	Kuiper belt
Asteroids orbit the sun in a band between ______ and Jupiter	Mars
The largest asteroid is called _______	Pallas
Asteroids are chunks of rock and ______	ice
Comets are made up of rocks, ice and ______	dust
____________ between the particles in a comet holds it together	gravitational attractions
As a comet approaches the Sun, a bright ______ can develop on the comet.	tail
The _____ is the solid, inner part of the comet.	coma
As the comet approaches the Sun, it heats, changing some ice in the nucleus into a _____	gas
Energy from the Sun pushes gas and dust particles away from the nucleus and makes it _____	glow
____________ comets take less than 200 years to orbit the Sun. They usually come from the _______	short-period- Kuiper belt
_________ comets take more than 200 years to orbit the Sun. They come from the ________	Long period- oort cloud
A small, rocky particle that moves through space is a _______	meteoroid
As it passes through Earths atmosphere, friction with the air makes a meteoroid and the air around it ______	burns
A streak of light in the atmosphere made by a glowing meteoroid is a ________	meteor
Most meteoroids _____ up in the atmosphere	burn up
A meteoroid that strikes the surface of a planet or a moon is called an _________	meteorite
A meteorite can form a bowl shaped depression called an ______ in the surface is strikes	impact creator
The outer planets are made of materials that are usually ___ of Earth.	gases
gravitational forces produced by the large sizes of these planets change gases into _____	liquids
____ is the largest planet in the solar system.	Jupiter
although it takes 12 years to revolve around the Sun, Jupiter _____ faster than any other planet.	rotates
Jupiter has a system of ____ around it.	rings
Jupiter's atmosphere contains helium but is mostly made up of ______	hydrogen
Jupiter's entire structure is made up of about 80 percent hydrogen, about 20 percent ____, and small amounts of other material.	helium
Jupiter's rotation stretches its clouds into colorful _____ __.	swirling bands
the ____ ____ ___ on Jupiter is a storm that has lasted more than 300 years.	Great Red Spot
Jupiter has a solid core that is surrounded by ____ ____	liquid hydrogen
the four largest moons of Jupiter are called _____ ____. these are Io, _____, Ganymede, and Callisto.	Galilean moons-Europa
like Jupiter, Saturn rotates _____ and has clouds in bands.	rapidly
Saturn is mostly made of ____ and helium.	hydrogen
Saturn has the largest ____ system in the solar system.	ring
Saturn has ____ bands of rings, each of which contains thousands of smaller rings.	seven
the rings are made mainly of ___ particles.	ice
most of Saturn's moons are small, but one of them, ____, is larger than the planet Mercury.	Titan
Uranus's atmosphere contains mostly hydrogen and helium, with small amounts of ____.	methane
Beneath Uranus's atmosphere is a slushy layer of water, ____, and other materials.	ammonia
Uranus might have a rocky ____	core
the rotational axis of Uranus is ____ more than that of other planets.	tilted
Uranus has at least ___ moons and a small ring system.	27
the atmosphere and interior of Neptune are similar to ____.	Uranus
Neptune has at least ___ moons and a faint ring system.	13
the inner planets are those closest to the ___. They are also called the _____ _____	Sun- terrestrial planets
the inner planets are made of ___ and metallic materials.	rock
the outer layers of the inner planets are in the ____ state.	solid
_____ is the planet closest to the Sun.	Mercury
Mercury has no gases close to its surface, which means it has no ____.	atmosphere
Because of its small mass, Mercury's ____ is not strong enough to hold gases to its surface.	gravity
Because Mercury has no wind to move energy from place to place, the temperature on the side of Mercury facing the Sun are always extremely ___.	hot
Mercury's surface is covered with impact ____, smooth plains, and high cliffs	craters
Mercury has a core made of ___ and nickel. Its mantle is made of oxygen and ___.	iron-silicon
_______ is the second planet from the Sun	Venus
Venus _____ more slowly than it revolves,so a day on Venus is longer than a year on Earth	rotates
Unlike most other planets,Venus rotates from ____ to _____	east-west
Most of Venus atmosphere is made up of ________	carbon dioxide
Venus is covered by a thick layer of ______	clouds
The clouds on Venus are made of ____	acid
Venus is the ______ planet in the solar system	hottest
The high temperature on Venus are caused by the _____________	greenhouse effect
The greenhouse effect increases surface temperature because the ________ traps solar energy.	atmosphere
Most of the surface of Venus is covered by solidified _____	lava
The third planet from the Sun is ______	Earth
Earths atmosphere is made up of ______ and a mixture of gases.	water vapor
The atmosphere produces an _____________ that increases Earths average surface temperature.	greenhouse effect
______ is supported on Earth because of its atmosphere, large bodies of liquid water, and moderate temperature range.	life
Earth has a solid inner core and an _____ outer core.	liquid
The ______ surround the outer core	mantle
Earths crust is broken into large sliding _______	plates
Earths ________ is made mostly of oxygen and silicon.	crust
Mars is the _______ planet from the sun.	fourth
Mars has ____ small moons	two
Many probed have examined the surface of Mars; most have looked for signs of ________	water
Mars atmosphere contains mostly _____________	carbon dioxide
Mars surface appears to be red because its soil contains _________	iron oxide
Ice caps on Mars are made up of ice and frozen ______________	carbon dioxide
Features on Mars surface include craters,lava flows, canyons, and largest known __________ in the solar system	mountain

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