Sjha 6 Sci Chap 2.2

Front 1

solar system

Back 1

The sun and everything that orbits it make up the ___

Front 2

billion

Back 2

The solar system was formed 4.6 ___ years ago from a cloud of gas and dust

Front 3

sun

Back 3

As the solar system formed, in the center of the cloud where the gas was the hottest and densest, a star formed called the ___

Front 4

FALSE

Back 4

True or False - as the solar system was formed it was shaped like a disk, as it rotated, gravity caused it to flatten and become shaped like a ball

Front 5

gravity

Back 5

What caused the left over gas and dust from the solar system to form and clump together and form small rocky icy bodies; planets and other objects

Front 6

planet

Back 6

Other than the sun, what are the largest objects in the solar system?

Front 7

planet

Back 7

This object orbits the sun, it's massive enough to be nearly spherical in shape, and has no other large object in its orbital path

Front 8

same

Back 8

All of the planets revolve in the [same or different] direction

Front 9

faster

Back 9

The closer a planet is to the sun the [faster or slower] it revolves

Front 10

Mercury

Back 10

The closest plant to the sun - _________ - orbits the sun once every 88 days

Front 11

Neptune

Back 11

The planet furthest from the sun - _________ - orbits the sun once every 165 earth years

Front 12

do not

Back 12

Planets are massive objects that [do/do not] have other objects of similar size in their orbital paths around the sun

Front 13

dwarf planets

Back 13

_________ orbit the sun and are nearly spherical in shape but they share their orbital path with other objects of similar size

Front 14

Pluto

Back 14

This was once considered a planet but it is now classified as a dwarf planet

Front 15

No because some asteroids are spherical

Back 15

Are all spherical bodies in the solar system planets? Yes/No and why?

Front 16

Moon

Back 16

_____ is a natural satellite that orbit an object other than a star

Front 17

Asteroids

Back 17

Small rocky objects that orbit the sun

Front 18

Asteroid belt

Back 18

Most asteroids are in the ______________ located between the orbits of Mars and Jupiter

Front 19

Comets

Back 19

small objects made of rock and ice that orbit the sun

Front 20

As the comet get close to the sun, the ice melts and the water forms a tail behind the comet

Back 20

Why does a comet form a tail?

Front 21

TRUE

Back 21

True or False - The orbital path of a comets stops at the outer solar system beyond Neptune.

Front 22

TRUE

Back 22

True or False - Meteoroids are small rocky particles that move through space

Front 23

meteor

Back 23

When a meteoroid enters the earth's atmosphere it produces a streak of light called a ____

Front 24

impacts earth

Back 24

A meteoroid becomes a meteorite only if it _______

Front 25

160

Back 25

Approximately how many moons do we have in our solar system?

Front 26

FALSE

Back 26

True or False - Asteroids don’t have moons

Front 27

TRUE

Back 27

True or False - Meteoroids are dust or small pieces of debris; most are no larger than a fingernail

Front 28

5

Back 28

How many dwarf planets [including Pluto] are in our solar system?

Front 29

rocky planets

Back 29

Inner planets are also called the ____ because they are formed from the rocks and heavy elements including metals left behind

Front 30

iron

Back 30

The cores of the inner plants are mostly ______

Front 31

smaller

Back 31

The inner planets are the [smaller or bigger] planets

Front 32

few

Back 32

Inner planets have [few or many] moons and almost no rings.

Front 33

Mercury, Venus, Earth and Mars

Back 33

List the Inner planets

Front 34

inner

Back 34

Which rotate more slowly - the inner or the outer planets

Front 35

gas

Back 35

The four outermost planets formed from ____ and other material that escaped from the region closest to the sun

Front 36

outer

Back 36

___________ planets are also known as the he gas giants

Front 37

larger

Back 37

Outer planets are [larger or smaller] than inner planets

Front 38

more

Back 38

Outer planets rotate a [more or less] quickly than inner planets

Front 39

FALSE

Back 39

True or False - Outer planets do not have rings

Front 40

many

Back 40

Outer planets have [few or many] moons

Front 41

False - do not have solid surfaces with atmospheres made of hydrogen and helium

Back 41

True or False - outer planets have hard solid surfaces and thick atmospheres made of concrete and rock