Question 1 of 10
TEKS 7A-7FEasy
A rock is best defined as:
Aa single pure chemical element
Ba manufactured building material
Ca naturally occurring solid made of one or more minerals
Dthe preserved remains of an organism
Explanation
Most rocks are mixtures of one or more minerals.
Question 2 of 10
TEKS 7A-7FEasy
The relative hardness of a mineral is measured using the:
ACelsius scale
BMohs hardness scale
CpH scale
DRichter scale
Explanation
The Mohs scale (1 = talc to 10 = diamond) ranks minerals by scratch resistance.
Question 3 of 10
TEKS 8A-8FEasy
Increasing the steepness (slope) of the land will generally cause the rate of erosion to:
Astay exactly the same
Bincrease
Cdecrease
Dstop completely
Explanation
Steeper slopes give running water and gravity more energy, increasing erosion.
Question 4 of 10
TEKS 8A-8FEasy
A stream is able to erode and transport the largest, heaviest particles when its velocity is:
Ahigh (fast-moving)
Blow (slow-moving)
Cdecreasing to a stop
Dzero (standing still)
Explanation
Faster-moving water has more energy, so it can erode and carry larger, heavier sediment.
Question 5 of 10
TEKS 8A-8FEasy
The fan-shaped or triangular deposit of sediment that forms where a river enters a quiet ocean or lake is a:
Acanyon
Bglacier
Cdelta
Dsand dune
Explanation
As a river loses speed entering still water, it drops sediment, building a delta.
Question 6 of 10
TEKS 7A-7FEasy
Earth’s major layers, from the outside inward, are the:
Acrust, core, and mantle
Bmantle, crust, and core
Ccore, mantle, and crust
Dcrust, mantle, and core
Explanation
From surface to center: crust, then mantle, then core.
Question 7 of 10
TEKS 8A-8FEasy
The physical or chemical breakdown of rock into smaller pieces at Earth's surface is called:
Aweathering
Bsubduction
Cdeposition
Dcondensation
Explanation
Weathering breaks rock down in place; it is distinct from erosion (the transport of the pieces).
Question 8 of 10
TEKS 7A-7FEasy
A rock that forms from the cooling and solidification of molten magma or lava is classified as:
Asedimentary
Bmetamorphic
Ca single mineral
Digneous
Explanation
Igneous rock forms when molten material (magma/lava) cools and solidifies.
Question 9 of 10
TEKS 8A-8FMedium
The process by which weathered rock and sediment are picked up and transported by water, wind, or ice is:
Acementation
Bcrystallization
Cweathering
Derosion
Explanation
Erosion is the transport of sediment by an agent such as running water, wind, or glacial ice.
Question 10 of 10
TEKS 7A-7FEasy
A crack or break in rock along which movement has taken place is called a:
Acontour
Bdelta
Cfault
Dmineral
Explanation
A fault is a fracture in rock along which the two sides have moved relative to each other.