Carding Mill Valley

Question 1

What is the title of the investigation?

Answer 1

Investigating the change in the velocity of the river as it travels downstream at Carding Mill Valley

Question 2

What are the advantages of this location?

Answer 2

• Shows significant changes downstream over a short distance
• Accessible with a footpath along the river
• It is safe, the river is not too deep

Question 3

What are the potential risks of the investigation?

Answer 3

• Falling/tripping
• Weather related risks
• Health issues (asthma)
• Drowning
• Road accident

Question 4

What was the main sampling technique used?

Answer 4

Stratified sampling

Question 5

What is stratified sampling?

Answer 5

It is selecting a specific location to collect data, this may be when you think it is likely that a change will occur

Question 6

What is a disadvantage of using stratified sampling?

Answer 6

Could be biased

Question 7

What is an advantage of using stratified sampling?

Answer 7

Specific and important data can be collected

Question 8

How did we measure the velocity of the river?

Method

Answer 8

• Used a metre ruler to measure 5m stretch
• Put a ping pong ball at start
• Use a stopwatch to time how long it took to get to the end
• Calculate distance/time

Question 9

How was the investigation of velocity kept accurate?

Answer 9

No one stood in the path of the ping pong ball or assisted it because this would affect results

Question 10

What was the conclusion of the investigation?

Answer 10

The overall velocity increased downstream