________ is a measure of the average kinetic energy of the individual atoms or molecules in a substance
Fill in the blank(s) with correct word
Temperature
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Children learning the process of good home gardening decide to help as best they can. Every day they walk along rows of bean plants, carefully inspecting each plant for insect and removing any that they find
However, the bean plants do not grow well and few beans form. Their parents notice the beans, inspect the plants and soil, and tell the children that walking around the plants every day has hurt the plants by A) compacting the soil, decreasing aeration and infiltration. B) increasing soil aeration and killing soil microorganisms. C) reducing the nutrient minerals in the soil. D) converting the topsoil into clay.
Which of the following is the formula of the pyrophosphate ion?
A) PO43- B) HPO42- C) P2O72- D) P2O74-
If we study plant communities on a world-wide basis, we find they can be divided into major terrestrial ecosystems known as ____________________
Fill in the blank(s) with correct word
Long oceanic mountain chains typically are characterized by ________
A) granitic plutons and batholiths B) rocks older than 1 billion years old C) highly deformed sedimentary rocks D) layers of igneous rocks