The Solar SystemThe Solar System

Module A Chapter 2Module A Chapter 2

Grade 4Grade 4

The SunThe Sun

Center of the universeCenter of the universe

Has the greatest massHas the greatest mass

Largest, brightest and hottest object in the solar Largest, brightest and hottest object in the solar systemsystem

Key TermsKey Terms

Meteorites: chunks of rocks from outer space.Meteorites: chunks of rocks from outer space. Meteors: chunks of rock that burn up brightly Meteors: chunks of rock that burn up brightly

as they fall through the Earth’s atmospheresas they fall through the Earth’s atmospheres

Comets: icy balls of frozen gas and dustComets: icy balls of frozen gas and dust

Oort Cloud: clouds of cometsOort Cloud: clouds of comets

The Inner PlanetsThe Inner Planets

MercuryMercury VenusVenus EarthEarth MarsMars

Inner PlanetInner Planet

Earth

Orbits aroundThe sun

The Earth is an inner planet

It is an inner planetBecause of how close it is to the sun

The Inner PlanetsThe Inner Planets

Mercury

Closest planetto the sun Covered by dust

Craters on it formed

by meteorites

The Inner PlanetsThe Inner Planets

Venus

Has a thick atmosphere

Surrounded by

clouds

Surrounded byCarbon dioxide

and acid

The Inner PlanetsThe Inner Planets

Mars

Looks reddish

You may findwater here

Nights are colder than

the days

Atmosphere is mostly carbon

dioxide

The Outer PlanetsThe Outer Planets

JupiterJupiter

SaturnSaturn

UranusUranus

NeptuneNeptune

PlutoPluto

Outer PlanetsOuter Planets

Jupiter

Largest planet

Made of layers of liquid hydrogen

and helium

Rings of dustAnd ice

Creates moreheat than it

receives

Cold planet

Outer PlanetsOuter Planets

Saturn

Almost as large asJupiter.

Famous for itsrings.

Cold planet

The Outer PlanetsThe Outer Planets

Uranus and

Neptune

Blue-greenplanets

Very coldVery far from

the sun

PlutoPluto

Farthest from The sun

Ninth planet from

The sun

The smallestplanet

Review QuestionsReview Questions

The rings of Saturn, are caused by The rings of Saturn, are caused by _______ and ______ that spin around the _______ and ______ that spin around the equator of the planet. equator of the planet.

snow and sleet?snow and sleet?

Pickles and ice cream?Pickles and ice cream?

Dust and ice?Dust and ice?

Dust and IceDust and Ice

What causes Mars to appearWhat causes Mars to appearreddish?reddish?

Rusty IronRusty Iron Red paintRed paint cloudsclouds

Rusty IronRusty Iron

What is a meteor?What is a meteor?

A star that burns brightlyA star that burns brightly

An inner planetAn inner planet

Chunks of rock that falls through the Earth’s Chunks of rock that falls through the Earth’s atmosphereatmosphere

Chunks of rock that burnChunks of rock that burnbrightly as they fall through brightly as they fall through

Earth’s atmosphere.Earth’s atmosphere.

Which is the largest planet?Which is the largest planet?

EarthEarth

JupiterJupiter

MarsMars

JupiterJupiter

Chunks of rock from outer space Chunks of rock from outer space that reach Earth’s surface are:that reach Earth’s surface are:

NeptuneNeptune

Oort CloudOort Cloud

MeteoritesMeteorites

Meteorites!Meteorites!

Comets called _______________ Comets called _______________ may surround the solar system.may surround the solar system.

Oort CloudOort Cloud

JupiterJupiter

Peanut ButterPeanut Butter

Oort CloudOort Cloud

Connecting IdeaConnecting IdeaInner Planets Outer Planets

MercuryVenusEarthMars

JupiterSaturnUranusNeptunePluto