hazards test 3

What is the type of mechanical weathering where water fills in cracks and freezes causing the rock to expand and generate larger cracks

Frost wedging

How do drains help to prevent landslides

Drains divert water away from the slope

Which of the following human actives can decrease the incidence of mass wasting

Improving drainage from the slope

All lakes in Texas are man made

False

Where does water in a meandering river run the slowest

On the inside of a bend

White of the following is the most important driving force in a landslide

Weight

Which of the following mass wasting processes does not necessarily involve water

Rockfall

Which of the following describes slump

Blocks of rock break off and move together along a curved path

One true indication of a rock fall is an accumulation of rocks called talus

True

How does urbanization increase incidences of landslides

All of the above increase landslides

What is the most important agent in chemical weathering

Water

What is the most accepted explanation for exfoliation

Release of pressure as overlying rock is eroded causing the intrusion to expand creating exfoliation

What triggered the landslide in snohomish county Washington in March 2014

Record rainfall in the month of March

Weathering weakens the rock that results in mass movement where the rocks are rounded by hitting one another is known as

Abrasion

All of the following are driving forces except

Direction between the grains

The maximum slope that a material can be piled before gravity causes it to slide is called

Angle of repose

Which is not a quick form of mass movement

Creep

As water is continuously added to unconsolidated material it becomes more

Unstable

What direction do streams flow in the US

Downhill

Artificial levees are the best measure to prevent flooding of our streams

False

Which of the following regions would you expect to see solifluction

Alaska

Which channel would have the highest stream velocity

A narrow channel at the head of a stream

Where on a driver would you most likely find point bars and why

On the inside of a bend because that is where the river deposits most

Why is mt Rainier considered to be the most dangerous volcano in the US

All of the above

The primary control of stream velocity is

Stream gradient

What happens when a streams sediment load is greater than the carrying capacity of the stream

The channel becomes braided

Which if the following involved rapid downslipe movement of a coherent usually large block of earth material along a planar surface

Rock slide or rock glide

Which of the following environments is not susceptible to mass wasting

Relatively flat lying area

If you see a gently sloping hillside with tilting utility poles broken retaining walls and trees with curved tree trunks what type of mass wasting has probably occurred

Creep

Does adding vegetation to a slope make it more or less stable

It spends on the slope adding vegetation could make the slope either more or less stable

Slumps are the only true form of mass wasting that are not triggered by excess water

False

There were not any indications of unstable slopes in the area of snohomish Washington landslide

False

The lowest point to which a stream can erode is known as

The base level

A regional of land where water drains downhill into a stream is known as a

Drainage basin

Which lake in Texas is not man made

caddo lake

Volcanoes are entirely detrimental to the planet and human civilization offering no benefits to humankind

False

Where are the volcanic dangers in the United States

Pacific Northwest

How are v-shape valleys formed

Active Down cutting of a stream

The competence of a stream is

The maximum sediment size the stream can transport

Large scale volcanic eruptions can cause a drop in global temperatures

True

What signs do scientist look for when predicting volcanic eruptions

All of the above

The greatest hazard to human life associated with volcanoes is

Pyroclastic flows

All water in a stream flows at the same velocity

False

One of the reasons volcanic eruptions are so deadly is that there is no way to predict where an eruption will occur in the near future

False

The stream gradient of most rivers

Is greater near the headwaters than near the mouth

A streak with a v shaped profile is most likely found at

The headwaters of a stream

The outer edge of a meander where sediment is eroded is a

Cut bank

A 100 year flood is most catastrophic than a 50 year flood

True

Which of the following flows results in the most rapid mass movement

Mudflow

Which of the following hazard is the most evident on the shsu campus

Creep