Biology > QUESTIONS & ANSWERS > Arizona State University BIO 130 Physical and Chemical Properties of Soil Lab Quiz (All)

Arizona State University BIO 130 Physical and Chemical Properties of Soil Lab Quiz

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• Question 1 0 out of 10 points What is the name of your soil's texture? Remember that soil texture is a scientific classification, and not a descriptive term. (3 points) How did you decide on t... his texture classification? Cite evidence about how your soil behaved and felt when you did your soil texture analysis using the criteria from the USDA flowchart that you used (i.e., did your soil form a ball, a ribbon, and was it gritty or smooth?) to help you to determine the texture of your soil. (7 points) [None Given] [None] Response Feedback: No answer was given. -10 • Question 2 0 out of 10 points Upload a picture of your soil sample here from your computer. Make sure your name is IN the picture. If you worked with (a) lab partner(s), please make sure all of the names in your group are in the picture. Each member of the group may upload the same picture. (10 points) [None Given] Response Feedback: No picture was uploaded. -10 • Question 3 2 out of 2 points After performing the "USDA Qualitative Test for Soil Texture", I determined that my soil texture was _______________. Type in your soil texture and check that the spelling is from the chart. Leave spaces between words. For example, type "clay loam" with spaces between the words and no caps (and without the quotes, of course). cla y Evaluation Method Answer Exact Match sand Exact Match loamy sand Exact Match sandy loam Exact Match silt loam Exact Match loam Exact Match clay loam Exact Match sandy clay Exact Match silty clay Exact Match clay Exact Match sandy clay loam Exact Match silty clay loam • Question 4 2 out of 2 points Water Retention video: Based on your observation of these two different soils, do soils with high sand or high clay content drain quickest? High Sand High Sand • Question 5 2 out of 2 points Case study question. You collect a soil sample that when wet can retain a ball shape, a long ribbon without breaking, and is smooth when you rub it between your fingers. Based on this evidence, it is most likely a ____________. Silty clay Silty clay • Question 6 2 out of 2 points Collecting your sample: How did you ensure that the sample of soil that you used to analyze for different physical and chemical properties was the same (homogeneous) for each test? I collected one large sample (about 2 cups) and mixed it up so that each subsample of soil was from a homogeneous batch of soil. I collected one large sample (about 2 cups) and mixed it up so that each subsample of soil was from a homogeneous batch of soil. Answer Feedback: Yes, this is what you were supposed to do! • Question 7 0 out of 2 points Physical properties of soil: If you added 100 mL of water to a soil, and 55mL of water drained from the soil, what is the % water retention of this soil? 55% 45% • Question 8 0 out of 2 points Case study. You collect a soil sample that can NOT retain a ball shape when it is wet and is gritty when you rub it between your fingers. Based on this evidence, it is most likely a _____________. Sandy loam Sand Answer Feedback: Only sands will not retain a ball when wet. • Question 9 2 out of 2 points Chemical properties of soil: How much nitrogen was in your soil sample? Enter your answer as one of the following: high, medium, low, very low. Make sure to use the spelling! mediu m Evaluation Method Answer Exact Match high Exact Match medium Exact Match low Exact Match very low • Question 10 2 out of 2 points Pre-lab reading: Which soil texture is known to be the best for agriculture? Loam Loam • Question 11 2 out of 2 points Loam soil is composed mostly of which soil particle size? An approximately even mix of sand, silt and clay. An approximately even mix of sand, silt and clay. • Question 12 2 out of 2 points Chemical properties of soil: The cap and capsule for the pH test was ___________ in color. green green [Show More]

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