LAB 3 - 2 Exercise - Interpreting Graphs

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Jan 9, 2024

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Name: CHAU DINH Section: 1401-81800 ENVR 1401 – EXERCISE Lab 3 - Interpreting Graphs NOTE: There may be more than one correct answer for questions on this lab exercise. 1. Correctly label the following population pyramids (U.S., Italy and Kenya): Kenya. U.S. Italy 2. Which histogram(s) reflects slow to no population growth? Italy Kenya U.S. 3. Which country has the smallest percentage of population beyond major reproductive age (i.e., >44years)? Italy Kenya U.S. 4. Which of these is typical of population growth in a developing country experiencing rapid growth? Italy Kenya U.S. 5. Which curve represents a population in which many organisms die at a young age and a few live to be very old? Type I Type II Type III 6. Which of the three curves is typical for humans? Type I Type II Type III

7. What is the overall reduction in soil erosion on cropland from 1982 to 2001?___ -41.94 % SHOW WORK: [(0.8+1)-(1.4+1.7)]/(1.4+1.7)*100= -41.94% 8. Methods to reduce which type of soil erosion have been more successful? Wind SHOW WORK: Wind erosion has a percent change of -42.86% which is less than water erosion of -41.18% WIND: (0.8-1.4)/1.4*100=-42.86% WATER: (1-1.7)/1.7*100=-41.18% Erosion from Cropland, 1982-2001 3.5 3 2.5 2 1.5 1 0.5 0 1.4 1.3 0.9 0.8 0.8 1.7 1.5 1.2 1 1 1982 1987 1992 Year 1997 2001 Wind Water

NASA Global Climate & Hydrology Center Data 9. What percentage of the population in the City of Austin is over 50 years of age? (Circle answer) 25% 34% 9% 10. If population growth in the City of Austin was a result of birth rate and not migration, then the population growth rate should be: (Circle answer) rapid slow 11. In 1982 the volcano El Chichon erupted and in 1991 Mt Pinatubo erupted. What impact did these Warmer events have on stratospheric temperature: 12. In what year was the coldest month recorded: 2001

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Include “units” in answers for Questions 15 through 29: 13. What is the average rate of plant growth? (round to 1 decimal place ) 1.2 SHOW WORK: (55-10)/38=45/38=1.2 14. During what period of time did the most rapid growth occur? 21 - 26 days EXPLAIN HOW THE GRAPH REFLECTS THIS: It quickly increases from 33cm to 45cm in height 15. What is the most rapid rate of growth for this plant? ( to 1 decimal place ) 2.4 SHOW WORK: (45-33)/(26-21)=2.4 16. During what period of time did the slowest growthoccur? 7-18 days EXPLAIN HOW THE GRAPH REFLECTS THIS: It slowly increases from 22cm to 27cm in height 17. What is the slowest rate of growth for this plant? ( to 2 decimal places ) 0.45 SHOW WORK: (27-22)/(18-7)= 0.45 60 50 Plant Growth 55 45 40 30 20 10 10 0 33 27 22 0 10 20 Time (days) 30 40 Height (cm)

18. What is the total annual precipitation received at this locale? __1582mm =62.28 inches SHOW WORK: 13+24+27+43+121+259+301+306+290+160+35+3=1582 mm 19. What is the average annual temperature at this locale in Fahrenheit?____80.45 ° F SHOW WORK: (20+23+28+30+31+30+29+29+30+28+24+21)/12=26.92 C= 80.45 F 20. The proportion of women responding with a “yes” is equal to the proportion of men responding with a “no” True False 21. The proportion of “yes” responses exceeds the “no” responses True False

Invasive Species in Texas 120 100 80 60 40 20 0 1880 1900 1920 1940 1960 1980 2000 2020 Census Year 22. Using a ruler, draw a line of best fit which averages the data. 23. Calculate the slope and give appropriate units for the overall rate of invasion of species into Texas: 0.9375 SHOW WORK:slope= (y2-y1)/(x2-x1)=(80-20)/(1984-1920)=15/16=0.9375 24. Based on your line of best fit, how many invasive species should be expected in Texas by 2020? 100 25. List two reasons why your estimate of the number of invasive species that should be expected in Texas in 2020 may be in error. • Many invasive species are not yet documented, and their presence may go unnoticed until they have established themselves • Environmental conditions, such as climate change and habitat alterations, can influence the distribution and behavior of invasive species. Number of Species

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26. If water contains 14 ppm of dissolved oxygen, determine the temperature in degrees Fahrenheit at which it will become fully saturated? (calculate temperature to tenth of a degree) (Hint fully saturated = 100%) 35.6 o F SHOW WORK: (2 o C ×9/5)+32=35.6 o F 27. If the water in a stream is at 50 ° F, how much dissolved oxygen is present if the water is only 80% saturated? (Hint: need to convert F to C) 11.2 50 o F=5*(50-32)/9=10 o C

28. What percentage range of silt is contained in the soil designated by point A on the Soil Texture Triangle? 20-30% 40-50% 50-60% 29. What percentage range of sand is contained in the soil designated by point B onthe Soil Texture Triangle? 20-30% 40-50% 70-80% 30. If a soil contains 40 % sand and 25 % silt, the soil texture is: Clay loam Silt loam Loam 31. If a soil contains 8 % clay and 23 % silt, then what is the sand content? 69% SHOW WORK: 8+23=31 => 100-31=69%

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