Physical science

29. 10.811
Nitrogen

37. THE BEGINNING OF EVERYTHING

40. The abundance of chemical elements in
the universe is dominated by the large
amounts of hydrogen (74%) and
helium (24%) which were produced in the Big
Bang
Remaining elements, making up only about
2% of the universe, were largely produced by
supernovae and certain red giant stars

47. NUCLEAR REACTIONS
Are processes in which a nucleus
combines with another nucleus
(FUSION) or splits into smaller nuclei
(FISSION)
These processes involve the emission
of energetic particles of an atom, a
phenomenon known as
RADIOACTIVITY

48. RADIOACTIVE PARTICLES

49. NUCLEAR REACTIONS

60. STELLAR NUCLEOSYNTHESIS

62. Recite the Nucleosynthetic Stages of Big
Bangs
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•?
•?
•?
•?
•?
•?

74. WRITE THE NUCLEAR
EQUATION OF THE FF:
a. The isotope Th-234 decays by alpha emission
b. The isotope Fe-59 decays by beta emission
c. The isotope Tc-99 decays by gamma emission
d. The isotope C-11 decays by positron emission

75. WRITE A BALANCED NUCLEAR
EQUATION FOR EACH DECAY
PROCESS INDICATED:
1. The isotope U-232 decays by alpha emission
2. The isotope H-3 decays by beta emission
3. The isotope Rn-222 decays by alpha emission
4. The isotope Ce-144 decays by beta emission
5. The isotope I-129 decays by beta emission

76. WRITE A BALANCED NUCLEAR
EQUATION FOR EACH DECAY
PROCESS INDICATED:
6. The isotope Pu-239 decays by alpha emission
7. The isotope Be-7 decays by gamma emission
8. The isotope O-15 decays by positron emission
9. The isotope Zn-65 decays by positron emission
10. The isotope K-40 decays by positron emission

77. consist of
are known to have been
formed during
formed formed
formed
are made of
orbit the
has
define
Concept in a Box

78. 1. stellar explosion
2. electrons (negatively
charged)
3. stellar formation &
evolution
4. big bang
5. elements
6. atoms
7. H, He, Li
WORD BANK
8. Be to Fe
9. elements heavier than Fe
10.atomic mass
11.nucleus
12.neutrons (electrically
neutral)
13. protons (positively
charged and defines atomic
number)

83. QUESTIONS
1. What do you observe about the size of
the dots?
2. What do you observe about the
distance between them as the balloon
gets larger?
3. Assuming the dots represent the
galaxies, relate your observation to
Hubble’s law

84. EXTENSION
1. Remove the stickers from the balloon
2. Using a marker, draw 8 dots on the balloon
3. Inflate the balloon to about the size of your fist
4. Number each dot from 1 to 10
5. Using 1 as your reference, measure and
records its distance from the neighboring dots
6. Triple the size of the balloon, then repeat step
5

85. atoms elements
Big bang
Stellar
explosion
Stellar
formation
and
evolution
H, He,Li Be to Fe
Elements
heavier
than iron
nucleus
Electrons
(negatively
charged)
Protons
(positively
charged
Neutrons (electrically
neutral)
Atomic
mass
consist of
are known to have been
formed during
forme
d
forme
d
forme
d
are made of
orbit the
has
define
Concept in a Box