fission and fusion

Question 1

The most abundant element in the Universe

Answer 1

HYDROGEN

Question 1

An atom without any electrons is just a ?

Answer 1

NUCLEUS

Question 2

This is formed after a supernova, but not if the star is very heavy

Answer 2

NEUTRON STAR

Question 3

The process that makes stars smaller/contract

Answer 3

GRAVITATIONAL ATTRACTION

Question 3

The plural of nucleus

Answer 3

NUCLEI

Question 3

Main sequence stars that have about the mass of the Sun go onto this stage

Answer 3

RED GIANT

Question 4

This kind of object is so massive, light cannot escape its gravitational attraction

Answer 4

BLACK HOLE

Question 5

The force that acts on all matter to bring them together

Answer 5

GRAVITY

Question 6

This type of substance cannot be split into simpler ones

Answer 6

ELEMENT

Question 7

The longest stage of a star

Answer 7

MAIN SEQUENCE STAR

Question 8

Nuclei that have the same number of protons but different numbers of neutrons are ?

Answer 8

ISOTOPES

Question 8

This material (or plutonium) can be used in nuclear power stations

Answer 8

URANIUM

Question 9

What is the heaviest element that main sequence stars make?

Answer 9

IRON

Question 9

The charge of a proton

Answer 9

POSITIVE

Question 9

The stage of a star before becoming a supernova

Answer 9

RED SUPER GIANT

Question 10

This is made up of electrons and a nucleus

Answer 10

ATOM

Question 11

The first stage of a star’s life

Answer 11

PROTOSTAR

Question 12

If a red supergiant doesn’t become a black hole, it becomes a ? ?

Answer 12

NEUTRON STAR

Question 13

This material (or uranium) can be used in nuclear power stations

Answer 13

PLUTONIUM

Question 15

The opposite process of fusion

Answer 15

FISSION

Question 17

This process happens in stars to release energy

Answer 17

FUSION

Question 17

The overall charge of an atom

Answer 17

NEUTRAL

Question 18

A large ball of gas in which fusion happens

Answer 18

STAR

Question 19

A red giant becomes a ? …

Answer 19

WHITE DWARF

Question 20

What is formed after a supernova, if the star is has a lot of mass?

Answer 20

BLACK HOLE

Question 21

This is the stage of all stars after being protostars

Answer 21

MAIN SEQUENCE STAR

Question 22

This is the next stage of a main sequence star with much more mass than the Sun

Answer 22

RED SUPER GIANT

Question 23

The total amount of protons in an atom is the ? number

Answer 23

ATOMIC

Question 24

What is the final stage of a star that doesn't start with very much mass?

Answer 24

BLACK DWARF

Question 25

This process can occur if more than one neutron is produced by nuclear fission

Answer 25

CHAIN REACTION

Question 26

When 2 small nuclei join to make 1 larger nucleus

Answer 26

FUSION

Question 29

The centre of an atom

Answer 29

NUCLEUS

Question 30

Where fusion happens naturally

Answer 30

STAR

Question 31

The total amount of protons and neutrons in an atom is the ? number

Answer 31

MASS

Question 33

A particle in the nucleus with no charge

Answer 33

NEUTRON

Question 34

The lightest element

Answer 34

HYDROGEN

Question 35

The positively charged particle in the nucleus

Answer 35

PROTON

Question 37

The process of one large nuclues spliting into smaller nuclei

Answer 37

FISSION

Question 38

No electric charge

Answer 38

NEUTRAL

Question 39

What slow moving particle does a uranium nucleus absorb to start nuclear fission?

Answer 39

NEUTRON

Question 40

A white dwarf becomes a ? ?

Answer 40

BLACK DWARF

Question 41

The explosion of this type of star throws new elements into the Universe

Answer 41

SUPERNOVA

Question 42

The singular of nuclei

Answer 42

NUCLEUS

Question 43

A different form of an element

Answer 43

ISOTOPE

Question 44

The overall charge of a nucleus

Answer 44

POSITIVE

Question 45

The stage of a star before a black dwarf

Answer 45

WHITE DWARF

Question 47

The heaviest element that can be made in a star (that doesn't become a supernova)

Answer 47

IRON

Question 48

This particle and the neutron make up the nucleus of an atom

Answer 48

PROTON

Question 49

The stage of a star before a white dwarf

Answer 49

RED GIANT

Question 50

The stage of a star that leads to the creation of elements heavier than iron

Answer 50

SUPERNOVA

Question 51

Elements heavier than this are only produced in a supernova

Answer 51

IRON

Question 52

When nuclear fission reactions carry on (and may mutiply)

Answer 52

CHAIN REACTION