7th Grade Science Question Preview (ID: 37177)
7.8A, 7.8B, 7.8C.
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Which is most likely to increased the erosion that occurs on the banks of a river?
a) heavy rains on the mountain that is the river's source
b) high winds over the ocean to which the river flows
c) high temperatures incresing evaporation from the river
d) ice formation at the source of the river
What is an ecoregion?
a) Description of land surface area with reference to variation in elevation
b) Earth material that is broken down by weathering; can be eroded and deposited by water, wind, ice, and gravity
c) Large area characterized by distinctive plants, animals, climate, and ecological features
d) the mechanical and chemical processes that break down rock into smaller pieces
Sand dunes are piles of sand found in desert areas. What causes sand dunes to form?
a) water
b) wind
c) earthquakes
d) volcanoes
Which is an effect of weathering on the Earth's surface?
a) building mountains
b) creating hurricanes
c) breaking down rocks and forming soil
d) causing lava flows
How are canyons formed?
a) earthquakes breaking rock layers
b) wind smoothing out rock formations
c) lava flowing from nearby volcanoes
d) rivers carrying sediment that erodes land
Sediments deposited at the mouth of a river can create what?
a) a lake
b) a volcano
c) a canyon
d) a delta
The rolling plain ecoregion has many deep canyons. This is probably because of
a) moving glaciers
b) deep lakes
c) flowing rivers
d) high winds
The Blackland Prairie ecoregion has many exposed boulders that are smooth and rounded. This is probably because of
a) hurricanes
b) wind blown sand and rain
c) severe droughts
d) deep and rapid rivers
Rivers carry and deposit sediment along their course. Were would the largest, heaviest sediment particles most likely be deposited?
a) near the start of the river where water travels fastest
b) in locations where the river banks are the widest
c) in locations where the river banks are the narrowest
d) at the river's mouth where the river meets the ocean
Which forces can lead to changes in the Earth's surface?
a) Tornado/Hurricane
b) Volcanic Eruption
c) Earthquake
d) All of the above
What is topography?
a) a description of land surface area with reference to variation in elevation
b) the mechanical or chemical process of breaking rock into smaller pieces
c) earth material broken down by weathering; can be eroded and deposited by water, wind, ice, and gravity
d) process by which water, ice, wind, and gravity remove and transport sediment from one place to another
What is sediment?
a) Earth material that is broken down by weathering; can be eroded and deposited by water, wind, ice, and gravity
b) Process by which gravity, water, wind, and ice deposit weathered and relocated sediment
c) Description of land surface area with reference to variation in elevation
d) Large area characterized by distinctive plants, animals, climate, and ecological fe
The state of Texas has ten ecoregions characterized by what?
a) topography
b) biotic and abiotic factors
c) climate, soil type, and water availability
d) all of the above
Types of weathering include what?
a) physical or mechanical weathering
b) chemical weathering
c) organic or biological weathering
d) all of the above
What processes lead to GRADUAL changes of the Earth's surface?
a) weathering
b) erosion
c) deposition
d) all of the above
What does the term biotic mean?
a) When sediment creatd by weathering and moved by erosion settles in a different location due to gravity
b) When the rock of soil of Earth's surface is moved to another location by water, ice, or wing
c) The living components of an ecosystem, such as plants and animals
d) The non-living components of an ecosystem, such as soil and sunlight
What does the term abiotic mean?
a) The gradual wearing down of a geological formation due to its physical or chemical changes to the surface of rocks
b) When sediment created by weathering and moved by erosion settles in a different location due to gravity
c) The living components of an ecosystem, such as plants and animals
d) The non-living components of an ecosystem, such as soil and sunlight
What is deposition?
a) The gradual wearing down of a geological formation due to its physical or chemical changes to the surface of rocks
b) When sediment created by weathering and moved by erosion settles in a different location due to gravity
c) When the rock or soil of Earth's surface is moved to another location by water, ice, or wind
d) The nonliving components of an ecosystem, such as soil and sunlight
What is erosion?
a) The gradual wearing down of a geological formation due to its physical or chemical changes to the surface of rocks
b) When sediment created by weathering and moved by erosion settles in a different location due to gravity
c) When the rock or soil of Earth's surface is moved to another location by water, ice, or wind
d) The non-living components of an ecosystem, such as soil and sunlight
What is weathering?
a) The gradual wearing down of a geological formation due to its physical or chemical changes to the surface of rocks
b) When sediment created by weathering and moved by erosion settles in a different location due to gravity
c) When the rock or soil of Earth's surface is moved to another location by water, ice, or wind
d) The nonliving components of an ecosystem, such as soil and sunlight
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