Geology 100: Exam #1 Questions and Answers with Verified Solutions |
Latest 2026 Update
Q: How do Nebula form?
Answer:
The sun, the planets, and other objects orbiting the Sun originated at the same time
and from the same source through the collapse and condensation of a planetary
nebula (great cloud of gas made by an exploding star) and have evolved in varying
ways since that time Eight classical planets, five dwarf planets 5 billion years ago a
swirling nebula, a cloud of interstellar gas and dust, began to collapse inward under
the pull of gravity
Q: Define a star
Answer:
Star is a celestial body of hot gases that radiates energy generated by nuclear
reactions in the interior
When a star's concentration of hydrogen is too low to support the fusion process, it
begins
fusing helium in its core
Then becomes 1,000 to 10,000 times brighter than previously, becoming a red giant
,Geology 100: Exam #1 Questions and Answers with Verified Solutions |
Latest 2026 Update
Q: Mantle
Answer:
o Rock
o Moves cm per year, rate of plates in motion
o 80% of earths total volume
o Intermediate density
o Silicon and oxygen
o Earth's thickest layer
o Capable of flow because of high temperature and pressure
Plasticity
Q: Crust
Answer:
o Upper lithosphere
o Brittle rock that fractures easily
o Oceanic crust
Iron and magnesium enriched magma emerges from the mantle onto the seafloor
, Geology 100: Exam #1 Questions and Answers with Verified Solutions |
Latest 2026 Update
Q: Rock is dense and relatively lacking in lighter compounds compared to
continental
Answer:
Q: Continental Crust
Answer:
Generally composed of rock that is relatively enriched with lighter
compounds
"floats" on denser mantle
Latest 2026 Update
Q: How do Nebula form?
Answer:
The sun, the planets, and other objects orbiting the Sun originated at the same time
and from the same source through the collapse and condensation of a planetary
nebula (great cloud of gas made by an exploding star) and have evolved in varying
ways since that time Eight classical planets, five dwarf planets 5 billion years ago a
swirling nebula, a cloud of interstellar gas and dust, began to collapse inward under
the pull of gravity
Q: Define a star
Answer:
Star is a celestial body of hot gases that radiates energy generated by nuclear
reactions in the interior
When a star's concentration of hydrogen is too low to support the fusion process, it
begins
fusing helium in its core
Then becomes 1,000 to 10,000 times brighter than previously, becoming a red giant
,Geology 100: Exam #1 Questions and Answers with Verified Solutions |
Latest 2026 Update
Q: Mantle
Answer:
o Rock
o Moves cm per year, rate of plates in motion
o 80% of earths total volume
o Intermediate density
o Silicon and oxygen
o Earth's thickest layer
o Capable of flow because of high temperature and pressure
Plasticity
Q: Crust
Answer:
o Upper lithosphere
o Brittle rock that fractures easily
o Oceanic crust
Iron and magnesium enriched magma emerges from the mantle onto the seafloor
, Geology 100: Exam #1 Questions and Answers with Verified Solutions |
Latest 2026 Update
Q: Rock is dense and relatively lacking in lighter compounds compared to
continental
Answer:
Q: Continental Crust
Answer:
Generally composed of rock that is relatively enriched with lighter
compounds
"floats" on denser mantle
