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Exploring Measurement in Living Systems

Discover the significance of measurements in living systems, from length to volume and temperature. Learn about units, accuracy, and the International System of Measurement. Explore how scientists measure tiny living things and investigate relationships between human "wingspan" and height.

lana-ramsey
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Exploring Measurement in Living Systems

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Presentation Transcript

  1. Living Systems

  2. Chapter One: Studying Life • 1.1 Measurements • 1.2 Thinking Like a Scientist • 1.3 Graphs

  3. Investigation 1A Measurement and Data • Is there a relationship between human “wingspan” and height?

  4. 1.1 Measurement and Data • A measurement is a value that tells the amount of something. • A measurement has a quantity and a unit. How do we measure tiny living things?

  5. 1.1 Measurement and Data • A unit is a fixed amount of something. • The centipede below is 5 centimeters (5 cm.) in length. • The earthworm is 5 inches (5 in.) in length. • Which is a larger unit, centimeters or inches?

  6. 1.1 International System of Measurement • Units allow people to communicate amounts. • To make sure their measurements are accurate, scientists use a set of standard units that have been agreed upon around the world. • The International System of Measurement is known as the S.I. (System International).

  7. 1.1 Length • Length is a measurement of distance. • How should we measure the length of this fish?

  8. 1.1 Area • Area is a measurement of how much surface something has.

  9. 1.1 Volume • Volume is a measurement of the amount of space something occupies.

  10. 1.1 Measuring Liquids • The surface of a liquid forms a curve rather than a straight line. • That curve is called a meniscus. • If the meniscus curves downward, read the volume at the bottom of the curve.

  11. 1.1 Mass • Mass is the measure of the amount of matter that makes up something.

  12. 1.1 Temperature • Temperature is a measure of how hot or cold something is. • As particles move faster on average, the temperature goes up. • As particles move slower on average, the temperature goes down.

  13. 1.1 Measuring Solutions • A solution is a mixture of two or more substances that are evenly distributed at the molecular level. • Scientists use units of concentrationwhen measuring levels of dissolved substances in water.

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