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anything that can be felt is made of

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152 Terms

1

anything that can be felt is made of

atoms

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2

where does matter come from

the big bang

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3

what is temperature

the measurement of how much energy matter is releasing

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4

what is kinetic energy

movement or vibrations

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5

what is the average temp on earth

31-34c

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6

how hot was the big bang

1 x 10˄14

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7

what are the 3 subatomic particles

protons, electrons, neutrons

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8

what happens when atoms and subatomic particles get hot

they fuse

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9

what is the most common element in the universe

Hydrogen

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10

what is nuclear fussion

the fusion of the nuclei of 2 atoms

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11

what is nuclear fission

The splitting of an atomic nucleus

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12

why do stars begin to die

because they begin to fuse helium into bigger elements

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13

what is a compound

a mixture of 2 elements

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14

what percentage of the observable universe does matter form

less than 0.1%

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15

what are atoms with charges called

ions

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16

Ions with a positive charge are called

cations

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17

ions with a negative charge are called

anions

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18

when was light made

during the big bang

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19

where does radiation come from

from stars

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20

what is relic radiation

radiation made during the big bang

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21

what is the main fuel for stars

hydrogen

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22

what are particles smaller than subatomic particles

quarks

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23

how old is the universe

14 billion years old

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24

is the universe always expanding

yes

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25

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26

steps of the big bang

inflation (10˄-32 seconds)
formation of protons
nuclear fusion begins(0.01 seconds)
nuclear fusion ends (3 minutes)
cosmic background radiations (380000 years)
modern universe (13.7 billion years)

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27

formation of protons

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28

nuclear fusion begins(0.01 seconds)

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29

nuclear fusion(3 minutes)

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30

cosmic background radiations (380000 years)

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31

modern universe (13.7 billion years)

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32

how is the idea that the universe started in a big bang a logical extension from a fact

because it is backed up by facts

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33

what evidence is there that the universe began in a big bang

the constant expansion of the universe and the cosmic background radiation

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34

at the time of the big bang what happened

all the matter and energy of the universe was compressed into a point, hydrogen formed after a few minutes, protons neutrons and electrons formed a few seconds after

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35

what are the 3 possibilities for the end of the universe

the big rip, big freeze and big crunch

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36

big rip

the universe expansion moves so fast that gravity cant keep up and it causes a rip in space

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37

big freeze

the universe continues getting colder and eventually it gets too cold

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38

big crunch

the rate of expansion of the universe stops and everything begins going in reverse and everything turns extremely small

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39

entropy

lack of order

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40

what is a constellation

a group of stars making an image

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41

astronomy

science that studies how stuff behaves in the universe

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42

cosmology

the study of the cosmos

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43

star

a massive ball of plasma

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44

what are stars made of

hydrogen

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45

what state of matter on earth has the most energy

gas

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46

what state of matter has the most energy

plasma

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47

what happens to electrons in plasma

they rip out of the atom and begin orbiting it

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48

do nebulas have a center of gravity

yes

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49

what happens to the atoms in a nebula because of the center of gravity

they crash into each other

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50

what are stars constantly doing

exploding

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51

what are exploding stars held together by

gravity

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52

true or false. all radiation produced by a star escapes

false

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53

what are the most common stars in the universe

red dwarfs

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54

why are red dwarfs not main sequence stars

because they dont fuse enough hydrogen in their core

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55

How are stars classified?

temperature, age and size

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56

what do opposite charges do

They attract

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57

what do equal charges do

they repel

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58

what keeps subatomic particles from splitting

nuclear energy

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59

what produces more energy? nuclear fusion or nuclear fission

nuclear fusion

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60

what are stars that only fuse hydrogen to hydrogen called

main sequence stars

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61

star layers

core, radiative zone and convection zone

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62

where does energy from nuclear fusion go to in a star

to the radiative zone

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63

what happens in the convection zone of a star

energy loops and only a small percentage of energy escapes

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64

why does energy stay in the convection zone

because gravity pulls it in

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65

what type of fusion takes place in most stars

nuclear fusion

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66

why dont stars collapse on themselves

because of nuclear energy

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67

what does a supernova create

a neutron star or a black hole

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68

what color is our sun

white

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69

how is the surface temperature of a main sequence star related to its luminosity

the hotter the surface temperature, the brighter the star

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70

what are brown dwarfs

failed stars

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71

why are red dwarves so

common

because they live a very long time

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72

is a red dwarf's energy output consistent

no

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73

is white dwarf's energy output consistent

yes

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74

what is a white dwarf

the core of a star which is left after a star dies through a supernova

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75

How are neutron stars formed?

when a supergiant explodes and condenses all of the subatomic particles into a small ball

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76

what does a neutron star fuse

electrons and protons into neutrons

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77

what are the densest objects in the universe

neutron stars

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78

what are the densest things in the universe

black holes

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79

what do main sequence stars leave when they die

a nebula and a white dwarf

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80

what happens when a star's hydrogen runs out

it becomes bigger

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81

what object has the second strongest force of gravity

neutron stars

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82

what are the 3 layers of neutron stars

crust, core, and atmosphere

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83

how are pulsars made

when neutron stars collapse they spin very fast and turn into pulsars

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84

what object has the strongest magnetic field

pulsars

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85

what is formed when 2 neutron stars spinning fast crash into each other

a kilonova

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86

can protons and electrons fuse

yes but is requires a lot of pressure

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87

what are subatomic particles made of

quarks

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88

what is the solid part of a black hole called

singularity

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89

how is the entrance of a black hole called

event horizon

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90

what is parallax

the apparent change in position of an object when you look at it from different places

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91

what is 1 astronomical unit equal to

150 million km

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92

what is the distance between the sun and the earth

1 au

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93

what is a parallax angle

the angle that is made due to parallax

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94

in what is the angle of a parallax angle measured in

arcseconds

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95

what is a parasec

a unit of length

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96

1 parasec is equal to

3.26 light years

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97

how much is an arcsecond in degrees

1/60

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98

distance formula

distance=astronomical unit/parallax angle

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99

parallax angle formula

parallax angle=astronomical unit/distance

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100

what is a galaxy

a group of solar systems

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