Problem 19
A pile of boulders lies at the base of a high-mountain cliff. Form a hypothesis explaining how the pile of rock might have formed.
Problem 19
How does time affect soil development?
Problem 21
Many scientists are conducting research to learn more about how soil erosion occurs and how it can be reduced. Write a question about soil erosion that you would like to research. With your teacher's help, carry out an investigation to answer your question.
Problem 24
A bag of fertilizer is labeled to list the nutrients as three numbers. The numbers represent the percentages of nitrogen, phosphate, and potash in that order. What are the percentages of these nutrients for a fertilizer with the following information on the label: 5-10-10?
