What occurs in alley cropping?
A. Crops are planted in strips between trees and shrubs.
B. Terraces are built to prevent swift water runoff.
C. Crops are planted across slopes.
D. Special tillers are used so the topsoil is not disturbed.
E. A row crop alternates in strips with another row crop.
Answer: A
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Without greenhouse gases, Earth's average temperature would be about ________.
A. 15°C B. 0°C C. -40°C D. -18°C
Which of the below statements accurately describes the components of an atom?
a. Protons, which have a positive charge, and neutrons, which have a negative charge, occupy the nucleus. Electrons with no charge orbit the nucleus in shells. b. Protons, which have no charge, occupy the nucleus. Positively charged neutrons and negatively charged electrons orbit the nucleus in shells. c. Protons, which have a positive charge, and electrons, which have a negative charge, occupy the nucleus. Neutrons with no charge orbit the nucleus in shells. d. Neutrons, which have no charge, occupy the nucleus. Positively charged protons and negatively charged electrons orbit the nucleus in shells. e. Protons, which have a positive charge, and neutrons, which have no charge, occupy the nucleus. Negatively charged electrons orbit the nucleus in shells.
Oxidation is an effective method to weather iron in olivine. However, what must happen first to free the iron?
A) Root wedging to break up the olivine B) Melting of the olivine C) Dissolution of olivine D) Hydrolysis acting on the olivine
What is a byproduct of photosynthesis
A. Oxygen and Glucose B. Carbon Dioxide C. Water D. Oxygen