Rivers Flashcards

(56 cards)

1
Q

what is primary data

A

Data collected first hand

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2
Q

What is data called when its already been published

A

Secondary data

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3
Q

What type of data uses words

A

Qualitative

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4
Q

Quantitive data is what kind

A

Data using numbers

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5
Q

Random selecting is data collected by chance, give an example

A

Bedrock-eyes closed

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6
Q

Systematic data is where each chosen site has an equal distance between them. Give an example

A

The depth of a river measured every 0.25m

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7
Q

What sampling uses study areas which have significantly differently parts, give an example

A

Stratified sampling, such as measuring the discharge in the upper course vs the lower course

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8
Q

Which method involved a piece of string either side of the bank and measured?

A

Width

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9
Q

What was a strength and a weakness of measuring the width?

A

Strength- accurate

Weakness-not reliable

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10
Q

How many rocks were gathered when collecting bedload samples

A

36

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11
Q

How was collecting bedrock not reliable

A

Different people have could have had different opinions on the shape of the rock based on the angle

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12
Q

which method involved dropping an orange/cork in the river?

A

Velocity

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13
Q

Why was the velocity method ineffective upstream? Why was it effective

A

Ineffective-Cork got stuck in rocks

Effective-repeated 3times

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14
Q

what was the distance between each measurement for the depth?

A

1metre

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15
Q

Further downstream the width, depth and velocity do what

A

Increase

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16
Q

Why did depth and width increase downstream?

A

More energy gathered by the time its in the in lower course, meaning more erosion on either bank

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17
Q

Is velocity slower or faster in the upper course?why

A

Slower because of the large bedload

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18
Q

Flood risk high or lower in the middle course?

A

Higher

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19
Q

What does the recreational land create?

A

A floodplain

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20
Q

The drainage basin increases flood risk because (1reason)

A

Impermeable land that leads to drains (i to the river)

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21
Q

which rock is formed by smaller particles deposited in layers, found in the majority of England.

A

Sedimentary

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22
Q

Example of each rock type:

A

Sedimentary:limestone
Metamorphic:slate
Igneous:granite

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23
Q

What rock is formed by existing rocks being compressed by heat and pressure, forming layers?

24
Q

Where are metamorphic rocks found?

A

Northern Scotland

25
Igneous rock is formed when?
Magma/lava cools to form smooth, solid crystals
26
North East Northern Island is where which rock type is found?
Igneous
27
How is the South Downs escarpment formed?
Chalk has been eroded, leaving clay vales exposed
28
What three factors make up South Downs
Agriculture Forestry Settlements
29
How much agriculture is there in the South downs?
85%
30
Name the four river processes
Weathering Erosion Transportation Deposition
31
Name a type of physical weathering
Freeze thaw
32
Name a type if chemical and biological weathering
Acid rain | Plant growth in cracks
33
Name the four types of erosion
Hydraulic action Abrasion Attrition Solution
34
Name the four types of transportation and what they are
Traction-big rocks on bed Saltation-small rocks on bed Suspension-fine material in water Solution-minerals in water
35
When a river loses energy and drops material, what is this
Deposition
36
Where is deposition commonly found and what can it form?
The lower course and can cause deltas
37
Name the 8 river land forms
``` Interlocking spurs Waterfalls Meanders Oxbow lakes Floodplains Levees Deltas ```
38
What is an antecedent condition
what the ground is like before a rainfall
39
When trees or man made objects get in the way of rain reaching the ground surface-what is this
Interception
40
When percolation occurs what happens to the water?
It seeps deeper below the surface
41
What is throughflow
When water in the soil flows parallel to the surface
42
What is groundwater flow
Water that flows through the rock parallel to the surface
43
water stored in a rock is called what
Groundwater
44
Soil moisture is what
Water held in the soil
45
A water table is the measure of what in the soil
Saturated ground
46
Positive comments on the suitability of the site: | 4 reasons
1. Close proximity to each other 2. sites look safe not too wide or deep 3. wide variety of results 4. mix of urban and countryside
47
What is a dip slope
Land that follows the same gentle slope as the layers of rock underneath
48
Limestone pavements are found where and what are they
Carbonic rain seeps into the permeable joints in the soft limestone at malham cove, this creates grykes
49
What is an erratic
A rock or boulder that are found on their own in an unusual shape after a glacier
50
What did the collision of the Eurasian and African plate millions of years ago result in the formation of? Example
the alps and the folding and uplift of sedimentary rocks in the UK for example- chalk escarpments in the South Downs
51
What happened the past million years?❄️ | Example
The ice age eroded glacier v shaped valleys into U shaped valleys, found in the Lake district
52
What is a vertical crack within a layer of rock called
A dike
53
Scarpslope is a steep slope that cuts through what
The layers of rock underneith
54
A two flat dimensional surface is called a what
Plane
55
A tor is a _____ of granite found at the top of a ____
Block, hill
56
What is a joint
A vertical crack within a layer of rock