Bacola Benchmark Review December 2023

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What is Physical Weathering?

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Physical weathering is the process of breaking down rocks and minerals into smaller pieces without changing their chemical composition. Examples include freeze-thaw cycles and abrasion.

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What is Chemical Weathering?

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Chemical weathering involves the chemical alteration of minerals in rocks, leading to changes in their composition. An example is the reaction of acid rain with limestone.

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What are Chemical Symbols?

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Chemical symbols are one or two-letter abbreviations used to represent elements on the Periodic Table, allowing for universal identification.

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What is the Periodic Table of Elements?

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The Periodic Table is a tabular arrangement of all known chemical elements, organized by increasing atomic number and grouped by similar properties.

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What is an Independent Variable?

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An independent variable is the factor that is changed or controlled in an experiment to test its effects on the dependent variable.

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What is a Dependent Variable?

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A dependent variable is the factor that is measured or observed in an experiment, which is affected by changes in the independent variable.

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What is Quantitative Data?

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Quantitative data refers to numerical information that can be measured and expressed mathematically, such as the number of protons or atomic weight.

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What is Qualitative Data?

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Qualitative data describes characteristics or qualities that cannot be measured numerically, such as color or texture.

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How many known elements are there approximately?

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Approximately 100 known elements have been identified in the Periodic Table.

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What is Atomic Weight?

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Atomic weight is the average mass of an element's atoms, measured in atomic mass units (amu), reflecting the number of protons and neutrons.