EAPS 105 Actual Exam Questions With
Reviewed 100% Correct
Detailed Answers
Guaranteed Pass!!
1. What is meant by primordial heating? - ANSWER Accretion and core
formation
Only occurred early during a planet's formation
2. What is the primary source of jupiter's moon Io's internal heat? - ANSWER
Tidal Heating
Due to Io's elliptical orbit around Jupiter, the gravitational force of Jupiter
causes Io to continuously elongate and shorten by ~100 meters depending on
its position in its orbit.
3. Why did lord kelvin's calculation of the age of the earth not work? -
ANSWER He neglected heat associated with radioactive decay.
4. How does radioactive decay produce heat? - ANSWER The nucleus of
an unstable atom transforms into a stable atom by throwing off neutrons or
protons, which causes collisions that produce heat.
,5. What contributes to the current internal temperature of the earth? -
ANSWER Earth's internal heat today is about half from radioactive decay
and half from primordial sources (accretion and core formation)
6. Why do smaller planets cool faster than larger ones? - ANSWER
Combination of less initial primordial heat (less impacts, smaller core), less
radioactive elements to keep them hot, as well That smaller bodies have
larger surface areas to volume ratios, enabling them to lose heat more
efficiently.
7. Why is pluto still hot inside? - ANSWER we're not sure
8. What are the mediums by which conduction, convection, and radiative heat
transfer move heat? - ANSWER Convection: Fluids (Liquid and Gas, and
Solids if it behaves like a fluid)
If the solid behaves like a fluid, it is called solid state convection
Conduction: Solid
Radiation: Electromagnetic waves / Light
9. How does conduction transfer heat? - ANSWER Conduction is the
transfer of heat through a solid by the spread of vibrations
The hotter atoms are, the more they vibrate
10.How does convection transfer heat? - ANSWER Convection is the
transfer of heat through fluid motion
, 11.What is the difference between radioactive decay and radiative heat
transfer? - ANSWER Radioactive decay produces heat in the interiors of
planets
Radiative heat gets rid of heat at a planet's surface
12.How does each layer within the earth transfer heat? - ANSWER
Lithosphere (solid)- Conduction
Mantle (solid)- Convection
Outer core (liquid)- Convection
Inner core (solid)- Conduction
13.What is the lithosphere? - ANSWER Strong outer shell of the Earth
consisting of the strong crust and uppermost mantle.
14. What is the asthenosphere? - ANSWER Underlies the lithosphere and
is hot enough to flow like a fluid even though it remains a solid
Weakness of the asthenosphere allows tectonic plates to slide around the surface
of the Earth
15. What drives plate tectonics? - ANSWER Convection/weakness in the
asthenosphere
16. What is a mid-ocean ridge? - ANSWER A location where two oceanic
plates are spreading apart due to convection in the asthenosphere
underneath it, usually where heat is moving upwards.
Reviewed 100% Correct
Detailed Answers
Guaranteed Pass!!
1. What is meant by primordial heating? - ANSWER Accretion and core
formation
Only occurred early during a planet's formation
2. What is the primary source of jupiter's moon Io's internal heat? - ANSWER
Tidal Heating
Due to Io's elliptical orbit around Jupiter, the gravitational force of Jupiter
causes Io to continuously elongate and shorten by ~100 meters depending on
its position in its orbit.
3. Why did lord kelvin's calculation of the age of the earth not work? -
ANSWER He neglected heat associated with radioactive decay.
4. How does radioactive decay produce heat? - ANSWER The nucleus of
an unstable atom transforms into a stable atom by throwing off neutrons or
protons, which causes collisions that produce heat.
,5. What contributes to the current internal temperature of the earth? -
ANSWER Earth's internal heat today is about half from radioactive decay
and half from primordial sources (accretion and core formation)
6. Why do smaller planets cool faster than larger ones? - ANSWER
Combination of less initial primordial heat (less impacts, smaller core), less
radioactive elements to keep them hot, as well That smaller bodies have
larger surface areas to volume ratios, enabling them to lose heat more
efficiently.
7. Why is pluto still hot inside? - ANSWER we're not sure
8. What are the mediums by which conduction, convection, and radiative heat
transfer move heat? - ANSWER Convection: Fluids (Liquid and Gas, and
Solids if it behaves like a fluid)
If the solid behaves like a fluid, it is called solid state convection
Conduction: Solid
Radiation: Electromagnetic waves / Light
9. How does conduction transfer heat? - ANSWER Conduction is the
transfer of heat through a solid by the spread of vibrations
The hotter atoms are, the more they vibrate
10.How does convection transfer heat? - ANSWER Convection is the
transfer of heat through fluid motion
, 11.What is the difference between radioactive decay and radiative heat
transfer? - ANSWER Radioactive decay produces heat in the interiors of
planets
Radiative heat gets rid of heat at a planet's surface
12.How does each layer within the earth transfer heat? - ANSWER
Lithosphere (solid)- Conduction
Mantle (solid)- Convection
Outer core (liquid)- Convection
Inner core (solid)- Conduction
13.What is the lithosphere? - ANSWER Strong outer shell of the Earth
consisting of the strong crust and uppermost mantle.
14. What is the asthenosphere? - ANSWER Underlies the lithosphere and
is hot enough to flow like a fluid even though it remains a solid
Weakness of the asthenosphere allows tectonic plates to slide around the surface
of the Earth
15. What drives plate tectonics? - ANSWER Convection/weakness in the
asthenosphere
16. What is a mid-ocean ridge? - ANSWER A location where two oceanic
plates are spreading apart due to convection in the asthenosphere
underneath it, usually where heat is moving upwards.
