the mechanical weathering process Essay

the mechanical weathering process

Which of the following describes the mechanical weathering process called THERMAL EXPANSION?

alternate freezing and thawing of water in cracks and fractures in the rock

disintegration resulting from plants and animals

alternate expansion and contraction of rocks due to heating and cooling

the mechanical weathering process

rounded exfoliation of igneous and metamorphic rocks

Question 25

Wide valleys are characteristic of mature streams. They display ______________

broad floodplains and many meander bends

the mechanical weathering process

broad floodplains and vigorous downcutting

meanders and rapids

many rapids and waterfalls

Question 26

Which of the following factors does NOT affect a stream’s velocity?

gradient

channel size

the mechanical weathering process

magnetic field

the size of sediments on the stream bed

channel geometry ( in different parts of the channel the stream velocity are different)

question 27

Question 28

The imaginary line that separates two stream drainage basins is called _________.

a dashed line

a boundary line

a divide

a line of hills

Question 29

Most fresh water is found in __________________________.

frozen form as glaciers

the mechanical weathering process

swimming pools

lakes and rivers

underground as groundwater

Question 30

A _______1.________ is an area of land adjacent to a stream or river prone to flooding.

_______2.__________typically flood when the nearby river or stream surpasses its flood stage.

_____2.___________ are usually flat areas with higher elevation on both sides.

1. oxbow lake, 2. oxbow lakes

1. wet house, 2. wet houses

1. levee, 2. mouthbar

1. floodplain, 2. floodplains

the mechanical weathering process

Question 31

Alluvial fans form ____________________.

where a high-gradient stream (stream with a steep slope) leaves a narrow valley

where a stream gradient changes from steep to flat

where there are hills or mountains

all of the other answers

Question 32

Which of the followings is NOT a tributary contributing to the Mississippi River System (or the Mississippi drainage basin)? Canadian River

Alabama River

Ohio River

the mechanical weathering process

Tennesse River

Platte River

Question 33

In meandering streams, point bars form _____________________.

on the cutbank side of the meander, where stream velocity is highest

on the inside edge of the meander, where stream velocity is highest

on the cutbank side of the meander, where stream velocity is lowest

on the inside edge of the meander, where stream velocity is lowest

Question 34

Meanders are a feature of _____1.______. As rivers age they develop ______2.______ meanders. Eventually, meanders become so exaggerated that the curve is abandoned and _____3._______ is formed.

1. old age; 2. more and more exaggerated; 3. an oxbow lake

1. beauty; 2. water falls; 3. a dry river

the mechanical weathering process

1. rivers youthful nature; 2. less; 3. a dry lake

1. geology; 2. dangerous; 3. a beach

Question 35

If we compare a youthful stream with a graded river, we notice which of the following differences?

[choose two correct answers]

Youthful streams commonly have waterfalls but graded rivers do not.

Graded rivers commonly have waterfalls but youthful streams do not.

Graded rivers have steep gradients, whereas the youthful rivers have smooth concave profile decreasing in angle and gradient

towards the mouth

Youthful streams that are actively down-cutting their channels tend to be relatively straight and are typically ungraded, compared to a graded river which has a graded profile

Question 36

A “drainage basin” is _______________________.

a pot to catch rain the runs off the roof

the area drained only by a major river

the mechanical weathering process

always round

the area drained by a stream and its tributaries

the mechanical weathering process Essay

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