streams/ meanders/ some fossils

Question 1

streams

Answer 1

Any body of water with a current (brooks,creeks,rivers)

- Moving water is the most erosive force on earth
- Always flows downhill

Question 2

Tributary water system

Answer 2

A system that flows into a larger system

Question 3

watershed water system

Answer 3

The geogrpahic area drained by a particular river or stream

Question 4

stream erosion features

Answer 4

V-shaped Valley, Meanders (stream with curves that develop when a stream flows over flat land)

Question 5

stream deposition features

Answer 5

Delta, Oxbow ,Flood plain, levee

Question 6

Delta

Answer 6

A delta is a region at the end (mouth) of a stream or river that consists of sediments deposited as the velocity of the stream decreases (horizontal sorting)

Question 7

Oxbow lake

Answer 7

U shaped body of water that forms when a wide meander from the main stem of a river is cut off, creating a free-standing body of water

Question 8

Flood plain

Answer 8

Flat region next to a stream or river that may be covered by water in times of flood

Question 9

Levee

Answer 9

Streams in broad valleys sometimes flood and leave deposits of sand and silt on the land bordering and parallel to the streams

Question 10

How younger streams change over time

Answer 10

steep slope, high erosion, V shape

Question 11

How old streams change over time

Answer 11

Flat wand, slow moving (flood plain), high deposition (levees, Oxbow, Deltas), Meanders

Question 12

straight stream

Answer 12

Water moves fastest in the middle just below the surface

Question 13

Meander

Answer 13

outside of curve: Fastest,erosion,deeper

inside of curve: slower, despostion, shallow

Question 14

Glaciers (Movement of Ice)

Answer 14

: a naturally formed mass of ice and snow that moves downhill on
land under the influence of gravity

Question 15

Continental glacier

Answer 15

glaciers that form at high latitudes and flow outward to cover a large part
of a continent.

Question 16

Valley glacier

Answer 16

glaciers that form at high elevations when ice flows downhill as snow
accumulates and changes to ice.

Question 17

Glaciers will _________when there is more snow accumulating than melting.

Answer 17

advance (move forward)

Question 18

Glacier will __________ when there is more melting than snow accumulating

Answer 18

retreat (move backward)

Question 19

Striations

Answer 19

Evidence of glacial erosion/parallel scratches on bedrock

• Formed when rocks that are transported on the bottom of the glacier leaves scratches
  and grooves in the bedrock over which they pass.
• Indicate the direction the glacier moved

Question 20

U-shaped Valley

Answer 20

evidence of glacial erosion/
when a glacier moves down a mountain valley, the glacier and its load of
sediment pluck, scrape, and scour the sides of the valley changing its profile to a broader
U-shape

Question 21

What landscape features are evidence that glaciers deposited sediments

Answer 21

till, moraine, outwash plain, drumlin, Kettle lake, Erratic

Question 22

Till

Answer 22

unsorted, unlayered glacial sediments that are deposited directly by a glacier

Question 23

Moraine

Answer 23

a hill of till deposited directly from an edge or bottom of a glacire

Question 24

Outwash plain

Answer 24

horizontal sorted layers of glacial material in front of the glacier, formed
by the meltwater of the glacier

Question 25

Drumlin

Answer 25

Drumlin: glacial hills of unsorted, unlayered sediment that are shaped like the back of a
spoon by the ice

Question 26

Kettle lake

Answer 26

when blocks of ice are left behind, form a depression, and melt

Question 27

Erratic

Answer 27

Erratic: rocks that have been transported to an area (type of rock not normally found in
that area

Question 28

relative age

Answer 28

The age of rocks or events compared to the age of other rocks or events

Question 29

absolute age

Answer 29

The age of a rock object or event in years

Question 30

uniformitasim

Answer 30

The geologic processes that took place in the past are generally similar to those that take place now

Question 31

Principle of original horizontally

Answer 31

Sediments are deposited in horizontal layers that are parallel to the
Surface they were deposited on

Question 32

principle of superpostion

Answer 32

In undisturbed layers, the oldest layer is
On the bottom and each
Overlying layer is younger

Question 33

Igenous intrusions/ Extrusions

Answer 33

As hot magma squeezes into cracks and zones 0f weakness
The cooling magma passes its heat energy to the nearby rock

Question 34

erosion

Answer 34

Carrying away of weathered rock materials

Question 35

unconformity

Answer 35

A gap in the rock record cause by the burial of an eroded surface by younger sediments shown on rock outcrop by a wavy line

Question 36

folding

Answer 36

Layers of sedimentary rock that have been bent or warped by crustal forces

Question 37

Tilting

Answer 37

Formally horizontal rock layers that have been tilted at an angle by crustal activity

Question 38

faulting

Answer 38

A crack of weakness in earths crust along which movement occurs during an earthquake

Question 39

law of cross-cutting

Answer 39

A distruption that cuts through rock or another geologic feature must be younger than the rock or other geologic feature

Question 40

index fossils

Answer 40

Fossils of organisms that lived over a wide geographic area for a relatively short period of time