Chemistry, 09.07.2019 12:00 PotatoBananad
David is doing an investigation about factors that affect plant growth, so he plants two young elm trees near each other in his garden. he gives the first elm tree a gallon of water every week, and he gives the second elm tree fertilizer once a month. he plans on measuring the trees' heights and trunk girths every week for the next year. how can david best improve his investigation? a. test only one independent variable at a time b. do not measure the trees growth at all until a full year has passed c. use cedar trees instead of elm trees for the investigation d. place both trees in a greenhouse instead of his garden
Answers: 1
Chemistry, 21.06.2019 13:50
What does standard deviation reveal about data? a. the average of all the data points b. which of the data points is most reliable c. how spread out the data points are d. the percent error included in the data
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Chemistry, 21.06.2019 23:10
Nitrogen (n), phosphorus (p), and potassium (k) are the main nutrients in plant fertilizers. according to an industry convention, the numbers on the label refer to the mass percents of n, p2o5, and k2o, in that order. calculate the n: p: k ratio of a 30: 10: 10 fertilizer in terms of moles of each element, and express it as x: y: 1.0.
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Which is an example of the practical pursuit of alchemy? a. forming perfect substances. b. transforming base metals. c. developing metalworking techniques. d. linking spiritual characteristics with material substances.
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David is doing an investigation about factors that affect plant growth, so he plants two young elm t...
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