|
40: Project - The effect of depth on rate of flow. Read through the sheet below. It tells you what you need to write in your project. 1) Introduction You should say which river you studied, and the date of your visit. Say where this river is found. Explain what you are trying to find out. 2) Method List all the equipment you used for the time experiment. Write a detailed explanation of how you carried out the experiment. Explain how you measured the depth and width of the river. 3) Results Copy out your tables neatly. Using graph paper, construct a cross-sectional diagram of your river, like this:
Above is an example of a cross-sectional area diagram. Follow these instructions to draw your own. a)
To show the width of the river, use a scale of 10 small squares to 1
metre: If the river is 4.5 m across, you need to count 45 small squares. Use the bold lines on the graph paper to help you count in 10s. Draw a horizontal line ______ on the graph paper to show the width of the river at Site 3. Mark the width. b) Label the left bank (left side of the horizontal line) and the right bank (right side of the horizontal line).
c)
Now, mark the depth at the left bank. If the river is 40cm deep, you need to count 20 small squares. Draw a vertical line ( | ) from the left bank. 1 small square shows 2cm of river depth. d) Repeat for the right bank and midstream. e) Now join up these lines using a ruler. f) Colour inside the lines blue (as above). g) Now repeat these instructions for Site 4.
Now answer these questions for Site 3, writing full sentences. Write your answers in a paragraph with the subheading Site 3: What was the depth at the left bank? What was the depth at the right bank? What was the depth in midstream? How long did it take the cork to travel 2 metres at the left bank? How long did it take the cork to travel 2 metres at the right bank? How long did it take the cork to travel 2 metres in midstream? Where did the water flow the fastest? Where did the water flow the slowest? Where was the water the shallowest? Where was the water the deepest? Now answer the same questions for Site 4. Write your answers in a paragraph with the subheading Site 4.
4) Conclusions Answer these questions using full sentences. Write your answers in a paragraph: At Site 3, where was the water flowing the fastest? What was the depth of the water? At Site 3, where was the water flowing the slowest? What was the depth of the water? At Site 4, where was the water flowing the fastest? What was the depth of the water? At Site 4, where was the water flowing the slowest? What was the depth of the water? Generally, at which site did the river travel the fastest? Was the water generally deep or shallow? Generally, at which site did the river travel the slowest? Was the water generally deep or shallow? Now copy and complete these paragraphs: The river generally travelled the fastest at Site ______ where the water depth was _____________. This is because there was less water to move. The river travelled the fastest at the ________ _______ at this site. The river generally travelled the slowest at Site _______ where the water depth was ___________. This is because there was more water to move. The river travelled the fastest at the __________ _________ at this site. Where the river travels the fastest, the water depth is ____________. Where the river travels the slowest, the water depth is ____________.
|
|
   |
