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Chapter 1

Across
Includes all organisms on Earth as well as the environments in which they live
Frozen portion of water on Earth's surface
Area from the surface of the Earth down to its center
Number expressed as a value between 1-10 multiplied by a power of 10
Study of materials that make up Earth, the processes that form and change these materials, and the history of the planet and its life-forms since its origin
Study of the forces and processes that cause the atmosphere to change and produce weather
Idea, picture, system, or mathematical expression that represents the concept being explained
Study of the interactions of organisms and their surroundings
Series of problem-solving procedures that help scientists conduct experiments
Study of Earth's oceans
Blanket of gases that surrounds our planet
Down
Testable explanation of a situation that can be supported or disproved by careful procedures
All the water on Earth, including the water in the atmosphere
Explanation based on many observations during repeated investigations
The factor in an experiment that is changed by the experimenter
Factor that is affected by changes
Metric system
Principle that describes the behavior or natural phenomenon
Study of objects beyond Earth's atmosphere
Shows that the results of an experiment are a result of the condition being tested