Created by: Mildred

$100

Weathering Erosion Deposition Left Overs Left Unders

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Final Jeopardy

The kind of weathering

shown in the diagram is known as

Frost action or Ice wedging

Why does the powdered

limestone react with the acid at a greater rate than the larger rock?

It has a greater surface area in contact with the acid

After several minutes of shaking mineral B has lost mass and become rounded while

mineral A is unaffected. Explain why.

Mineral A is harder (more resistant to abrasion) than mineral B

Which of the following minerals would be altered most by contact with acid?

A) KAl3Si3O10(OH)2 B) (Fe,Mg)2SiO4

C) Fe3Al2Si3O12 D) CaCO3

C) CaCO3 (carbonate minerals react with acid while silicate

minerals do not)

Fe3Al2Si3O12 because it is the hardest (most resistant) mineral.

(see page 16 reference tables)

The following minerals were placed in a container of water and shaken for 30

minutes. At the end of that time which mineral showed the least evidence of

weathering and WHY?

A) KAl3Si3O10(OH)2 B) (Fe,Mg)2SiO4

C) Fe3Al2Si3O12 D) CaCO3

At which location in

the diagram is the

stream velocity lowest?

Velocity is lowest at location D (the inside of a curve)

A rock, found in the desert, has a pitted surface. Which agent of erosion is most

likely responsible for the rocks appearance?

The rock has been pitted by sand moved by the

WIND

Explain why the rocks have eroded unevenly.

Differences in hardness (resistance). The softer rocks have eroded more

than the harder ones.

DAILY DAILY DOUBLEDOUBLE

At which location (A through D) is the water velocity greatest and explain why

Velocity is greatest at B because it is farthest from the bottom and

sides (less friction)

According to the data, at which location was the gradient of the stream greatest?

At location C - the water velocity is greatest.

Which agent of erosion is

responsible for the deposition of the cross section of

sediment seen in the diagram?

Running Water

Which agent of erosion is

responsible for the deposition

of the sediment seen in the diagram?

Ice (glaciers)

At which location would

the smallest particles

probably be deposited?

Location D

If the velocity of a stream decreased from 400 cm/sec to 50 cm/sec which particle(s)

would remain in suspension?

Sand, Silt, and Clay

(must name all to get money)

What kind of particles would most likely be

deposited in the lake beyond the location of the clay deposits?

Colloids

In what kind of climate does chemical weathering proceed at

the fastest rate?

Warm (hot) and Wet

Some rocks such as limestone are weathered by contact with

acid. This kind of chemical weathering is known as.......

Carbonation

Name the 4 methods by which sediments are transported by

running water.

Floatation, Suspension, Rolling (saltation) and in

Solution.

What is the force that drives all erosion?

Gravity

Name 3 stream characteristics that can affect the rate of

erosion.

Slope (gradient), Rate of discharge, Shape of the

stream channel.

Sharp and angular rock fragments are found at the base

of a vertical cliff. By what method of erosion were they

transported there?

Gravity

Scratched and polished rock was probably eroded by

Glaciers

What term describes the granite rocks

depicted in the diagram?

Erratics

Name 3 factors that can affect the settling rate of particles in

still water.

Size, Density, and Shape

Name any 5 characteristics of regions shaped by glacial erosion and deposition.

1) Parallel grooves in rocks

2) U-shaped valleys

3) Scratched and polished rock

4) Erratics

5) Deep parallel lakes

6) Usorted, unconsolidated sediment

FINAL JEOPARDY

?

Forgetaboudit!

Raoul drops many balls into a column of water all at the same time. They settle to the bottom as shown in the diagram. Explain why this unexpected result occurred.

The smallest balls are the most dense and the largest balls are the

least dense.