Rivers Flashcards
(56 cards)
what is primary data
Data collected first hand
What is data called when its already been published
Secondary data
What type of data uses words
Qualitative
Quantitive data is what kind
Data using numbers
Random selecting is data collected by chance, give an example
Bedrock-eyes closed
Systematic data is where each chosen site has an equal distance between them. Give an example
The depth of a river measured every 0.25m
What sampling uses study areas which have significantly differently parts, give an example
Stratified sampling, such as measuring the discharge in the upper course vs the lower course
Which method involved a piece of string either side of the bank and measured?
Width
What was a strength and a weakness of measuring the width?
Strength- accurate
Weakness-not reliable
How many rocks were gathered when collecting bedload samples
36
How was collecting bedrock not reliable
Different people have could have had different opinions on the shape of the rock based on the angle
which method involved dropping an orange/cork in the river?
Velocity
Why was the velocity method ineffective upstream? Why was it effective
Ineffective-Cork got stuck in rocks
Effective-repeated 3times
what was the distance between each measurement for the depth?
1metre
Further downstream the width, depth and velocity do what
Increase
Why did depth and width increase downstream?
More energy gathered by the time its in the in lower course, meaning more erosion on either bank
Is velocity slower or faster in the upper course?why
Slower because of the large bedload
Flood risk high or lower in the middle course?
Higher
What does the recreational land create?
A floodplain
The drainage basin increases flood risk because (1reason)
Impermeable land that leads to drains (i to the river)
which rock is formed by smaller particles deposited in layers, found in the majority of England.
Sedimentary
Example of each rock type:
Sedimentary:limestone
Metamorphic:slate
Igneous:granite
What rock is formed by existing rocks being compressed by heat and pressure, forming layers?
Metamorphic
Where are metamorphic rocks found?
Northern Scotland