©BRAINBARTER EXAM SOLUTIONS 2024/2025
ALL RIGHTS RESERVED.
Erth101 Exam 2 Questions With Correct
Answers
Scientists who study the geologic record of global climate change infer that accelerated
weathering resulting from uplift of the Himalayan range and Tibetan Plateau is causing a global
decrease in atmospheric carbon dioxide that is, in turn, cooling the atmosphere over millions of
years. - answer✔true
When overlying pressure is released by tectonic forces or by erosion, it causes rock to break.
This pressure release leads to - answer✔joints
What percentage of Earth's atmosphere is carbon dioxide? - answer✔0.2%
The variables that most affect the weathering process are rock composition and -
answer✔climate
What is the most important weathering process from the standpoint of reducing carbon dioxide
levels - answer✔hydrolysis of continental silicate minerals
Clays are phyllosilicates, meaning their crystalline structure consist of layers of _______
organized in sheets - answer✔silica tetrahedra
What is the building of mountain ranges by continental collision called - answer✔orogenesis
1|Page
, ©BRAINBARTER EXAM SOLUTIONS 2024/2025
ALL RIGHTS RESERVED.
Which minerals formed at high temperatures and pressures, are the first to crystallize in a
cooling magma chamber, and among the least stable on Earth's surface, where the
environment differs most from their environment of crystallization - answer✔Mafic and
Ultramafic
Because of negligible rainfall, little organic matter, and low biological activity, arid climate soils
are composed of all of the following, except - answer✔humus
Which of the following is a reddish soil that is an important source of aluminum -
answer✔bauxite
Most chemical weathering is the result of water interacting with minerals in a rock -
answer✔true
Carbon dioxide increases the acidity of water to create ______, which is an effective chemical
weathering agent that causes hydrolysis, dissolution, and oxidation - answer✔carbonic acid
What is the most common chemical weathering process? - answer✔hydrolisis
How do burrowing organisms aid in the biological weathering process - answer✔They produce
carbon dioxide.
They overturn and mix soil particles.
They increase porosity.
They increase soil moisture content.
2|Page
, ©BRAINBARTER EXAM SOLUTIONS 2024/2025
ALL RIGHTS RESERVED.
All of these are aided by burrowing organisms in the weathering process.
What mineral does hydrolysis break down to make clay - answer✔feldspar
Why are members of the clay mineral group abundant in soils and sedimentary rocks -
answer✔they are the last to break down chemically at Earth's surface
Chemical weathering is the chemical decomposition of minerals in rock. This process may result
in the formation of the following, except: - answer✔new igneous minerals
What are the important biological weathering processes? - answer✔movement and mixing of
materials
simple breaking of particles
production of carbon dioxide by animal respiration or organic decay
changes in moisture content of soils
all of the above
Rocks with unusual shapes and "fluted" or flat faces may have been abraded by wind-blown
sediment. Such rocks are called: - answer✔ventifacts
Physical weathering: - answer✔increases the surface area of rocks
increases a rock's vulnerability to chemical deterioration
changes the appearance of Earth's surface
3|Page
ALL RIGHTS RESERVED.
Erth101 Exam 2 Questions With Correct
Answers
Scientists who study the geologic record of global climate change infer that accelerated
weathering resulting from uplift of the Himalayan range and Tibetan Plateau is causing a global
decrease in atmospheric carbon dioxide that is, in turn, cooling the atmosphere over millions of
years. - answer✔true
When overlying pressure is released by tectonic forces or by erosion, it causes rock to break.
This pressure release leads to - answer✔joints
What percentage of Earth's atmosphere is carbon dioxide? - answer✔0.2%
The variables that most affect the weathering process are rock composition and -
answer✔climate
What is the most important weathering process from the standpoint of reducing carbon dioxide
levels - answer✔hydrolysis of continental silicate minerals
Clays are phyllosilicates, meaning their crystalline structure consist of layers of _______
organized in sheets - answer✔silica tetrahedra
What is the building of mountain ranges by continental collision called - answer✔orogenesis
1|Page
, ©BRAINBARTER EXAM SOLUTIONS 2024/2025
ALL RIGHTS RESERVED.
Which minerals formed at high temperatures and pressures, are the first to crystallize in a
cooling magma chamber, and among the least stable on Earth's surface, where the
environment differs most from their environment of crystallization - answer✔Mafic and
Ultramafic
Because of negligible rainfall, little organic matter, and low biological activity, arid climate soils
are composed of all of the following, except - answer✔humus
Which of the following is a reddish soil that is an important source of aluminum -
answer✔bauxite
Most chemical weathering is the result of water interacting with minerals in a rock -
answer✔true
Carbon dioxide increases the acidity of water to create ______, which is an effective chemical
weathering agent that causes hydrolysis, dissolution, and oxidation - answer✔carbonic acid
What is the most common chemical weathering process? - answer✔hydrolisis
How do burrowing organisms aid in the biological weathering process - answer✔They produce
carbon dioxide.
They overturn and mix soil particles.
They increase porosity.
They increase soil moisture content.
2|Page
, ©BRAINBARTER EXAM SOLUTIONS 2024/2025
ALL RIGHTS RESERVED.
All of these are aided by burrowing organisms in the weathering process.
What mineral does hydrolysis break down to make clay - answer✔feldspar
Why are members of the clay mineral group abundant in soils and sedimentary rocks -
answer✔they are the last to break down chemically at Earth's surface
Chemical weathering is the chemical decomposition of minerals in rock. This process may result
in the formation of the following, except: - answer✔new igneous minerals
What are the important biological weathering processes? - answer✔movement and mixing of
materials
simple breaking of particles
production of carbon dioxide by animal respiration or organic decay
changes in moisture content of soils
all of the above
Rocks with unusual shapes and "fluted" or flat faces may have been abraded by wind-blown
sediment. Such rocks are called: - answer✔ventifacts
Physical weathering: - answer✔increases the surface area of rocks
increases a rock's vulnerability to chemical deterioration
changes the appearance of Earth's surface
3|Page
