Weathering J-Lab Questions (answers on bottom)

The canyon shown in the picture was most likely formed by-

/ high winds
/ earthquakes
/ running water
/ a volcano
Which of these pieces of basalt rock has probably been in a river the longest?
/ / /
/ / /

Which kind of rock is formed by the processes shown?

/ Sedimentary
/ Igneous
/ Basaltic
/ Metamorphic
All of the following may be found deep in a natural cave EXCEPT-
/ stalagmites
/ mineral deposits
/ photosynthetic organisms
/ groundwater

Which type of rock appears to be the most easily eroded by the river in this area?
/ Shale
/ Basalt
/ Sandstone
/ Limestone

The picture shows the layers in the bank of a river. The differences in the size of the particles in the layers are most likely caused by differences in the-

/ types of plants living on the bank
/ types of animals digging in the sediments
/ thickness of winter ice in the river
/ speed of the water carrying the sediments
Sinkholes associated with natural processes are characteristic of what type of bedrock?
/ Granite
/ Basalt
/ Limestone
/ Gneiss

Which layer of the above soil profile would be affected the most by weathering and erosion?
/ 2
/ 1
/ 3
/ 4

Government programs to reduce acid rain have resulted in cleaner emissions from U.S. industries in recent years. As a result, the sulfate concentration in rainwater has declined significantly. But the sulfate concentration in some lakes is showing little, if any, change. Why might this be true?

/ The sulfate in American lakes is actually coming
from industries in Europe and Asia.
/ Sulfate that accumulated earlier in the soil is still
being flushed into the lakes by run-off.
/ Individual industries produce fewer emissions but
the amount of precipitation has increased.
/ There is no connection between emissions
from industry and the acidity of lake water.

The breakdown of rocks and minerals into smaller particles without a change in composition is called-

/ mechanical weathering
/ igneous intrusion
/ chemical precipitation
/ metamorphic foliation

Limestone chips dissolve after they are placed in a beaker of dilute acid. Which geologic process is this most similar to?

/ Folding
/ Weathering
/ Subduction
/ Faulting

Which of the following best explains the rolling topography of the Valley and Ridge province in Virginia?

/ Ocean currents and uplift
/ Block faulting of marine sediments
/ Rifting and ocean waves
/ Folding and differential erosion

Which of the following is not considered a result of the movement of tectonic plates?

/ Earthquakes
/ Karst topography
/ Mountain ranges
/ Increased volcanic activity

According to the above diagram, the water supply will be most consistent in well-

/ 2
/ 4
/ 3
/ 1

Which recent geologic processes commonly occur in the Coastal Plain region of Virginia?

/ Erosion and deposition
/ Subduction and metamorphism
/ Crustal uplift and rock deformation
/ Rifting and intrusion

Rocks formed by the cementing of weathered materials are called-

/ extrusive igneous rocks / / basalt
/ magma sedimentary rocks

Weathering J-Lab Questions – Answer Key

The canyon shown in the picture was most likely formed by– (H) running water.

Which of these pieces of basalt rock has probably been in a river the longest?

(J)(because it is the roundest rock)

Which kind of rock is formed by the processes shown? (F) sedimentary

All of the following may be found deep in a natural cave EXCEPT–

(H) Photosynthetic organisms

Which type of rock appears to be the most easily eroded by the river in this area?(H) Sandstone

The picture shows the layers in the bank of a river. The differences in the size of the particles in the layers are most likely caused by differences in the–

(J) speed of the water carrying the sediments

Sinkholes associated with natural processes are characteristic of what type of bedrock? (H) Limestone

Which layer of the above soil profile would be affected the most by weathering and erosion? (G) Layer 1 – the top layer

Government programs to reduce acid rain have resulted in cleaner emissions from U.S. industries in recent years. As a result, the sulfate concentration in rainwater has declined significantly. But the sulfate concentration in some lakes is showing little, if any, change. Why might this be true? (G) Sulfate that accumulated earlier in the soil is still being flushed into the lakes by run-off.

The breakdown of rocks and minerals into smaller particles without a change in composition is called– (F) Mechanical weathering

Limestone chips dissolve after they are placed in a beaker of dilute acid. Which geologic process is this most similar to? (G) Weathering (chemical)

Which of the following best explains the rolling topography of the Valley and Ridge province in Virginia? (J) Folding and differential erosion

Which of the following is not considered a result of the movement of tectonic plates? (G) Karst Topography

According to the above diagram, the water supply will be most consistent in well- (H) 3 – Zone of Saturation

Which recent geologic processes commonly occur in the Coastal Plain region of Virginia?(F) Erosion and Deposition

Rocks formed by the cementing of weathered materials are called- (J) Sedimentary Rocks