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ILTS Earth and Space Science (108) Practice Tests & Test Prep by Exam Edge

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ILTS Science Earth and Space Science Sample Test

1 of 5

Scientific experimentation involves measurements. What type of measurement system is used during scientific investigations?

Correct Answer:

le systeme international d'unites

scientific experimentation often requires precise and standardized measurements to ensure reliable and repeatable results. one universally adopted measurement system used in scientific investigations is le système international d'unités, commonly referred to as the si system. this system is critical because it provides a consistent framework of units for scientists around the world, facilitating communication and comparison of experimental data.

the si system is an international standardization that evolved from the metric system. it is organized around seven basic units which include the meter (for length), kilogram (for mass), second (for time), ampere (for electric current), kelvin (for temperature), mole (for amount of substance), and candela (for luminous intensity). each of these units serves as the foundation for other derived units used in scientific measurements.

for instance, in measurements of length during scientific experiments, the meter is the basic unit of the si system. it provides a universal standard for measuring dimensions, whether it is the size of a bacterium under a microscope or the distance between planets in astronomy. in some contexts, smaller units such as centimeters or millimeters may be used, which are derived from the meter.

similarly, when measuring density, which is mass per unit volume, the kilogram and meter from the si system are used. the standard si unit for density is kilograms per cubic meter, although other units like grams per cubic centimeter (derived from si base units) are commonly used in specific contexts like chemistry or materials science.

overall, the adoption of le système international d'unités (si) in scientific investigations ensures that measurements are accurate and comparable across different laboratories and nations. this standardization is crucial for advancing scientific knowledge and facilitating international collaboration in research.