Earth Science — Semester B
Free Practice · 10 Questions · 20 min
20:00 Exit
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Question 1 of 10
TEKS 8A-8F Easy
The fan-shaped or triangular deposit of sediment that forms where a river enters a quiet ocean or lake is a:
A sand dune
B canyon
C glacier
D delta
Explanation
As a river loses speed entering still water, it drops sediment, building a delta.
Question 2 of 10
TEKS 8A-8F Easy
The physical or chemical breakdown of rock into smaller pieces at Earth's surface is called:
A condensation
B weathering
C subduction
D deposition
Explanation
Weathering breaks rock down in place; it is distinct from erosion (the transport of the pieces).
Question 3 of 10
TEKS 7A-7F Easy
A rock is best defined as:
A a manufactured building material
B a single pure chemical element
C a naturally occurring solid made of one or more minerals
D the preserved remains of an organism
Explanation
Most rocks are mixtures of one or more minerals.
Question 4 of 10
TEKS 8A-8F Easy
Increasing the steepness (slope) of the land will generally cause the rate of erosion to:
A stop completely
B stay exactly the same
C decrease
D increase
Explanation
Steeper slopes give running water and gravity more energy, increasing erosion.
Question 5 of 10
TEKS 8A-8F Medium
The process by which weathered rock and sediment are picked up and transported by water, wind, or ice is:
A cementation
B erosion
C crystallization
D weathering
Explanation
Erosion is the transport of sediment by an agent such as running water, wind, or glacial ice.
Question 6 of 10
TEKS 7A-7F Easy
Earth’s major layers, from the outside inward, are the:
A crust, core, and mantle
B crust, mantle, and core
C core, mantle, and crust
D mantle, crust, and core
Explanation
From surface to center: crust, then mantle, then core.
Question 7 of 10
TEKS 8A-8F Easy
A stream is able to erode and transport the largest, heaviest particles when its velocity is:
A zero (standing still)
B low (slow-moving)
C high (fast-moving)
D decreasing to a stop
Explanation
Faster-moving water has more energy, so it can erode and carry larger, heavier sediment.
Question 8 of 10
TEKS 7A-7F Easy
A rock that forms from the cooling and solidification of molten magma or lava is classified as:
A igneous
B a single mineral
C sedimentary
D metamorphic
Explanation
Igneous rock forms when molten material (magma/lava) cools and solidifies.
Question 9 of 10
TEKS 7A-7F Easy
The relative hardness of a mineral is measured using the:
A Mohs hardness scale
B Celsius scale
C Richter scale
D pH scale
Explanation
The Mohs scale (1 = talc to 10 = diamond) ranks minerals by scratch resistance.
Question 10 of 10
TEKS 7A-7F Easy
A crack or break in rock along which movement has taken place is called a:
A fault
B contour
C mineral
D delta
Explanation
A fault is a fracture in rock along which the two sides have moved relative to each other.

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