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P2 AQA Physics > fission and fusion > Flashcards

fission and fusion Flashcards

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1
Q

The most abundant element in the Universe

A

HYDROGEN

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1
Q

An atom without any electrons is just a ?

A

NUCLEUS

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2
Q

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

A

NEUTRON STAR

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3
Q

The process that makes stars smaller/contract

A

GRAVITATIONAL ATTRACTION

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3
Q

The plural of nucleus

A

NUCLEI

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3
Q

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

A

RED GIANT

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4
Q

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

A

BLACK HOLE

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5
Q

The force that acts on all matter to bring them together

A

GRAVITY

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6
Q

This type of substance cannot be split into simpler ones

A

ELEMENT

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7
Q

The longest stage of a star

A

MAIN SEQUENCE STAR

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8
Q

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

A

ISOTOPES

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8
Q

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

A

URANIUM

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9
Q

What is the heaviest element that main sequence stars make?

A

IRON

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9
Q

The charge of a proton

A

POSITIVE

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9
Q

The stage of a star before becoming a supernova

A

RED SUPER GIANT

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10
Q

This is made up of electrons and a nucleus

A

ATOM

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11
Q

The first stage of a star’s life

A

PROTOSTAR

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12
Q

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

A

NEUTRON STAR

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13
Q

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

A

PLUTONIUM

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15
Q

The opposite process of fusion

A

FISSION

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17
Q

This process happens in stars to release energy

A

FUSION

17
Q

The overall charge of an atom

A

NEUTRAL

18
Q

A large ball of gas in which fusion happens

A

STAR

19
Q

A red giant becomes a ? …

A

WHITE DWARF

20
Q

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

A

BLACK HOLE

21
Q

This is the stage of all stars after being protostars

A

MAIN SEQUENCE STAR

22
Q

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

A

RED SUPER GIANT

23
Q

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

A

ATOMIC

24
Q

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

A

BLACK DWARF

25
Q

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

A

CHAIN REACTION

26
Q

When 2 small nuclei join to make 1 larger nucleus

A

FUSION

29
Q

The centre of an atom

A

NUCLEUS

30
Q

Where fusion happens naturally

A

STAR

31
Q

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

A

MASS

33
Q

A particle in the nucleus with no charge

A

NEUTRON

34
Q

The lightest element

A

HYDROGEN

35
Q

The positively charged particle in the nucleus

A

PROTON

37
Q

The process of one large nuclues spliting into smaller nuclei

A

FISSION

38
Q

No electric charge

A

NEUTRAL

39
Q

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

A

NEUTRON

40
Q

A white dwarf becomes a ? ?

A

BLACK DWARF

41
Q

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

A

SUPERNOVA

42
Q

The singular of nuclei

A

NUCLEUS

43
Q

A different form of an element

A

ISOTOPE

44
Q

The overall charge of a nucleus

A

POSITIVE

45
Q

The stage of a star before a black dwarf

A

WHITE DWARF

47
Q

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

A

IRON

48
Q

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

A

PROTON

49
Q

The stage of a star before a white dwarf

A

RED GIANT

50
Q

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

A

SUPERNOVA

51
Q

Elements heavier than this are only produced in a supernova

A

IRON

52
Q

When nuclear fission reactions carry on (and may mutiply)

A

CHAIN REACTION

P2 AQA Physics (2 decks)

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