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ES Ch 1 Section 1


astronomy study of objects beyond Earth's atmosphere
meteorology the study of the atmosphere, which is the air surrounding Earth
geology study of material that make up Earth and the processes that form and change these materials, and the history of the planet and its life-forms since its origin
oceanography study of Earth's oceans including the creatures that inhabit its waters, its physical and chemical properties, and the effects of human activities
environmental science study of the interactions of humans with environment
geosphere the part of Earth from its surface to its center
atmosphere blanket of gases surrounding Earth that contains about 78 percent nitrogen, 21 percent oxygen, and 1 percent other gases such as argon, carbon dioxide, and water vapor
hydrosphere all the water in Earth's oceans, lakes, seas, rivers, and glaciers plus all the water in the atmosphere
biosphere all of Earth's organisms and the environment in which they live
scientific methods a series of problem-solving procedures that help scientists conduct experiments
hypothesis a testable explanation of a situation
independent variable factor that is manipulated by the experimenter in an experiment
dependent variable factor in an experiment that can change if the independent variable is changed
control standard for comparison in an experiment
Le Systeme International d'Unites replacement for ht emetric sustem; based on decimal system sinf the number 10 as the base unit; includes the meter: (m), second (s), and kilogram (kg)
scientific notation a method used by scientists to express a number as a value between 1 and 10 multiplied by a power of 10.
scientific model an idea, a system, or a mathematical expression that represents the idea being explained
scientific theory an explanation based on many observations during repeated experiments; called only if consistent with observations, can be used to make testable predictions, and is the simplest explanation; can be changed or modified with the discovery of new data
scientific law a principle that describes the behavior of a natural
Created by: selenamercado