SI Units and Significant Figures

From the study guide

Course Outline

  1. SI System and Base Units
  2. Derived Units and Volume
  3. Scientific Notation and Prefixes
  4. Metric Ladder Conversions
  5. Measurement and Significant Figures
  6. Significant-Figure Calculations

1. SI System and Base Units

Key Concepts & Definitions

  • International System of Units: a decimal measurement system established by the General Conference of Weights and Measures in 1960

β˜… Must-know

  • The SI base units listed are:
    • meter for length
    • kilogram for mass
    • second for time
    • ampere for electric current
    • kelvin for temperature
    • mole for amount of substance

Further detail

  • One meter equals 100 centimeters and 1,000 millimeters.

Memory Hook

Length, mass, time, current, temperature, substance

2. Derived Units and Volume

Key Concepts & Definitions

  • Derived unit: formed by combining SI base units in a calculated quantity

β˜… Must-know

πŸ“ Formula β€” Volume is calculated as length multiplied by width multiplied by height: V=lΓ—wΓ—hV = l \times w \times h.

  • The SI unit of volume is the cubic meter, while cubic centimeters are commonly used for solid objects and liters or milliliters for liquids.

Further detail

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Practice quiz preview

1. What is the International System of Units (SI)?

2. Which set lists SI base units for length, mass, time, electric current, temperature, and amount of substance in that order?

3. What makes a unit a derived unit in the SI system?

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Flashcard preview

What is the International System of Units (SI system)?

A decimal measurement system established in 1960.

Which organization established the SI system in 1960?

The General Conference of Weights and Measures.

Which SI base unit measures length?

The meter.

Which SI base unit measures mass?

The kilogram.

Which SI base unit measures time?

The second.

Which SI base unit measures electric current?

The ampere.

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Frequently asked questions

What does the SI Units and Significant Figures study guide cover?

It covers the core concepts of SI Units and Significant Figures, organized by topic with the key definitions, explanations and takeaways, so it's easier to learn and remember.

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How many questions are in the SI Units and Significant Figures quiz?

The practice quiz has 14 multiple-choice questions, each with an explanation. Use it to check what you know and find your gaps.

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How do I study SI Units and Significant Figures with flashcards?

There are 39 flashcards on SI Units and Significant Figures, with a question on the front and the answer on the back. Try to recall each answer before you flip, and let spaced repetition bring back the ones you miss.

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