C165 OA EXAM QUESTIONS WITH
CORRECT MARKING SCHEME
/. physical weathering - Answer-Breaking down rocks through physical processes like
freezing and thawing
/.chemical weathering - Answer-The process that breaks down rock through chemical
changes (acid rain)
/.Erosion - Answer-the process of eroding or being eroded by wind, water, ice or other
natural agents.
/.Evaporation - Answer-The change of a substance from a liquid to a gas
/.Condensation - Answer-The change from a gas to a liquid
/.Precipitation - Answer-rain, snow, sleet, or hail that falls to the ground.
/.Runoff - Answer-water that flows over the ground surface rather than soaking into the
ground
/.Infiltration - Answer-the process by which water on the ground surface enters the soil
/.Troposphere - Answer-The lowest layer of Earth's atmosphere; weather occurs here
/.Stratosphere - Answer-Contains the ozone layer
/.Mesophere - Answer-The layer of Earth's atmosphere immediately above the
stratosphere
Where meteors burn up
/.Thermosphere - Answer-The uppermost layer of the atmosphere, in which temperature
increases as altitude increases Auroras form here.
/.Exosphere - Answer-The outer layer of the thermosphere, extending outward into
space.
/.greenhouse effect - Answer-warming that results when solar radiation is trapped by the
atmosphere
/.greenhouse gases - Answer-Gases such as carbon dioxide, methane, nitrous oxide,
water vapor, and ozone in the atmosphere which are involved in the greenhouse effect.
, /.Solid - Answer-A state of matter that has a definite shape and a definite volume closely
packed.
/.liquid - Answer-A state of matter that has no definite shape but has a definite
volume.particles are close but can move past one another
/.Gas - Answer-A state of matter with no definite shape or volume particles are far apart
and move freely
/.homogeneous mixture - Answer-A mixture in which substances are evenly distributed
throughout the mixture example saltwalter
/.heterogeneous mixture - Answer-A mixture that is not uniform in composition;
components are not evenly distributed throughout the mixture example sand and water
/.Solvent - Answer-A liquid substance capable of dissolving other substances
/.periods on periodic table - Answer-A horizontal row of elements in the periodic table
/.groups on periodic table - Answer-a vertical row of elements in the periodic table
similar valence electrons
/.Crust - Answer-The thin and solid outermost layer of the Earth above the mantle
/.oceanic crust - Answer-thinner, more dense, younger crust making ocean floor mostly
basalt
/.continental crust - Answer-The portion of the earth's crust that primarily contains
granite, is less dense than oceanic crust, and is 20-50 km thick (Mostly granite)
/.Mantle - Answer-The layer of hot, solid material between Earth's crust and core.
Minerals.
/.core - Answer-The central part of the earth below the mantle contains mainly iron and
nickle
/.outer core - Answer-A layer of molten iron and nickel that surrounds the inner core of
Earth
/.inner core - Answer-a dense ball of solid metal due to immense pressure
/.divergent boundary - Answer-A plate boundary where two plates move away from
each other. Example mid-Atlantic range
CORRECT MARKING SCHEME
/. physical weathering - Answer-Breaking down rocks through physical processes like
freezing and thawing
/.chemical weathering - Answer-The process that breaks down rock through chemical
changes (acid rain)
/.Erosion - Answer-the process of eroding or being eroded by wind, water, ice or other
natural agents.
/.Evaporation - Answer-The change of a substance from a liquid to a gas
/.Condensation - Answer-The change from a gas to a liquid
/.Precipitation - Answer-rain, snow, sleet, or hail that falls to the ground.
/.Runoff - Answer-water that flows over the ground surface rather than soaking into the
ground
/.Infiltration - Answer-the process by which water on the ground surface enters the soil
/.Troposphere - Answer-The lowest layer of Earth's atmosphere; weather occurs here
/.Stratosphere - Answer-Contains the ozone layer
/.Mesophere - Answer-The layer of Earth's atmosphere immediately above the
stratosphere
Where meteors burn up
/.Thermosphere - Answer-The uppermost layer of the atmosphere, in which temperature
increases as altitude increases Auroras form here.
/.Exosphere - Answer-The outer layer of the thermosphere, extending outward into
space.
/.greenhouse effect - Answer-warming that results when solar radiation is trapped by the
atmosphere
/.greenhouse gases - Answer-Gases such as carbon dioxide, methane, nitrous oxide,
water vapor, and ozone in the atmosphere which are involved in the greenhouse effect.
, /.Solid - Answer-A state of matter that has a definite shape and a definite volume closely
packed.
/.liquid - Answer-A state of matter that has no definite shape but has a definite
volume.particles are close but can move past one another
/.Gas - Answer-A state of matter with no definite shape or volume particles are far apart
and move freely
/.homogeneous mixture - Answer-A mixture in which substances are evenly distributed
throughout the mixture example saltwalter
/.heterogeneous mixture - Answer-A mixture that is not uniform in composition;
components are not evenly distributed throughout the mixture example sand and water
/.Solvent - Answer-A liquid substance capable of dissolving other substances
/.periods on periodic table - Answer-A horizontal row of elements in the periodic table
/.groups on periodic table - Answer-a vertical row of elements in the periodic table
similar valence electrons
/.Crust - Answer-The thin and solid outermost layer of the Earth above the mantle
/.oceanic crust - Answer-thinner, more dense, younger crust making ocean floor mostly
basalt
/.continental crust - Answer-The portion of the earth's crust that primarily contains
granite, is less dense than oceanic crust, and is 20-50 km thick (Mostly granite)
/.Mantle - Answer-The layer of hot, solid material between Earth's crust and core.
Minerals.
/.core - Answer-The central part of the earth below the mantle contains mainly iron and
nickle
/.outer core - Answer-A layer of molten iron and nickel that surrounds the inner core of
Earth
/.inner core - Answer-a dense ball of solid metal due to immense pressure
/.divergent boundary - Answer-A plate boundary where two plates move away from
each other. Example mid-Atlantic range
