our solar system

Question 1

name the largest => smallest

Answer 1

universe, supercluster, group / cluster, galaxy, star

Question 2

what is a universe?

Answer 2

everything that physically exists, the entirety of space and time, and all forms of matter and energy

Question 3

what is a supercluster?

Answer 3

a gigantic cluster of 4-25 groups / clusters that are hundreds of millions of light years in size

Question 4

what is a group / cluster?

Answer 4

groups or clusters can be as little of 20-30 galaxies or as large as several thousand galaxies

Question 5

which is more massive: cluster or group?

Answer 5

cluster

Question 6

what is a galaxy?

Answer 6

a collection of stars, planets, gases and dust held together by gravity

Question 7

what is a solar system?

Answer 7

the sun with all the planets and other celestial objects held together by the sun’s gravity and orbit around it

Question 8

what is a celestial object?

Answer 8

any objects that exist in space

Question 9

what is a star (sun)?

Answer 9

a hot ball of gases that gives off large amount of energy

Question 10

what is a planet?

Answer 10

a large round object that orbits around one or more stars

Question 11

a planet has enough ____ so that gravity pulls it into a _____ shape

Answer 11

mass / round

Question 12

a planet clears other celestial objects out of its _____

Answer 12

orbit

Question 13

what are the 4 inner planets?

Answer 13

mercury, venus, earth, mars

Question 14

what are the 4 outer planets?

Answer 14

jupiter, saturn, uranus, neptune

Question 15

what are the inner planets made of?

Answer 15

rock

Question 16

what are the outer planets made of?

Answer 16

gases

Question 17

what is a dwarf planet?

Answer 17

a spherical or round object that orbits a star

Question 18

a dwarf planet has enough ____ to assume a nearly ____ shape

Answer 18

mass / round

Question 19

a dwarf planet has not cleared the ________ around its ____

Answer 19

neighbourhood / orbit

Question 20

is a dwarf planet a moon?

Answer 20

no

Question 21

what are some examples of small solar system bodies?

Answer 21

asteroids, comets, Kuiper belt, Oort cloud

Question 22

asteroids are left over from the _____ of the solar system

Answer 22

formation

Question 23

asteroids originated from the ______ between Mars and Jupiter

Answer 23

asteroid belt

Question 24

how do asteroids orbit the sun?

Answer 24

in a circular formation

Question 25

what are asteroids made up of?

Answer 25

metals and rocky material

Question 26

do asteroids have a "tail"?

Answer 26

no

Question 27

asteroids come in different _____ and _____

Answer 27

shapes / sizes

Question 28

asteroids can tell us the estimated age of the ____ _____

Answer 28

solar system

Question 29

what is an asteroid belt?

Answer 29

a region of rocky debris that forms a ring all the way around the sun, between Mars and Jupiter

Question 30

what is a meteoroid?

Answer 30

pieces of rock moving through space / rocky chunks that have broken off asteroids and planets

Question 31

what are meteors?

Answer 31

meteoroids that hit the Earth's atmosphere, burning up due to friction

Question 32

what are meteorites?

Answer 32

large meteors that reach the ground without burning up

Question 33

where do comets originate?

Answer 33

Kuiper Belt or Oort Cloud

Question 34

what sort of orbit do comets have?

Answer 34

elliptical

Question 35

what are comets made of?

Answer 35

ice, dust and rocky material

Question 36

when will the comet's ice vaporize?

Answer 36

when it is close to the sun

Question 37

what causes the comet's "tail"?

Answer 37

release of dust and gas

Question 38

what is a Trans-Neptunian object?

Answer 38

objects that circle the sun beyond the orbit of Neptune

Question 39

where are Trans-Neptunian objects located?

Answer 39

in the Kuiper Belt

Question 40

what is the Kuiper Belt made of?

Answer 40

materials left over from the formation of the solar system

Question 41

what is the Kuiper Belt?

Answer 41

a disc shaped region of icy objects beyond the orbit of Neptune

Question 42

what is the Oort Cloud?

Answer 42

a spherical cloud of small icy fragments of debris at the very edge of our solar system

Question 43

what is an Astronomical Unit (AU)?

Answer 43

the average distance between the Earth and the Sun

Question 44

what is one AU equal to?

Answer 44

150 000 000 km

Question 45

what is a light year?

Answer 45

the distance light travels in one year

Question 46

what do light years do?

Answer 46

tell us how far away an object is and how much time has passed since the light we see left the object