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Tools & Measurement. Technology. The application of science for practical purposes is called technology . New technology allows scientists to get information which wasn’t available previously. Tools for Seeing. Compound Light Microscope

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Technology
Technology

  • The application of science for practical purposes is called technology.

  • New technology allows scientists to get information which wasn’t available previously.


Tools for seeing
Tools for Seeing

  • Compound Light Microscope

    • An instrument that magnifies small objects so that they can be seen easily.

  • Electron Microscope

    • Focuses a beam of electrons to magnify an object.

    • The images produced are clearer and more detailed than those produced by light microscopes.


Measurement
Measurement

  • The International System of Units

    • Also called SI

    • Also called metric system

  • Advantages of SI

    • Helps scientists, worldwide, share and compare their observations and results

    • Almost all units are based on the number 10, which makes conversions from one unit to another easier.


Metric units
Metric Units

  • Length

    • Base Unit = Meter (m)

  • Volume

    • Base Unit= Cubic Centimeter (cm3) or Liters (L)

  • Mass

    • Base Unit= Gram (g)

  • Temperature

    • Base Unit = Kelvin (K) or Celsius (°C)


Tools for measuring length
Tools for Measuring Length

  • Meterstick

  • Metric Ruler


Tools for measuring volume
Tools for Measuring Volume

  • Graduated Cylinder

    • Remember volume tells you how much space that the liquid occupies.

    • The marks on the cylinder are called graduations.

    • The graduations on a cylinder are not always worth the same. Before using the cylinder you will need to figure out what each graduation is worth.

    • When a liquid is put into a cylinder, the surface curves. This curve is called ameniscus.

    • When reading the volume of a liquid, always read at the bottom of this curve while holding the surface at eye level.


Tools for measuring mass
Tools for measuring mass

  • A Triple Beam Balance

    • Remember mass is the amount of matter an object has.


Using a triple beam balance
Using a Triple Beam Balance

  • Zero the balance before you determine the mass of any substance.

  • Slide all of the riders back to the zero point. (To the left.)

  • Check to see that the pointer swings freely along the scale.

  • Use the adjustment screw to obtain an equal swing of the beams if necessary.

  • Place the object on the pan, move the riders along the beams beginning with the largest mass first. (The rider in the middle). If the riders are notched make sure all riders are in the notch before you take a reading. Move the rider, one notch at a time.


Tools for measuring temperature
Tools for Measuring Temperature

  • Thermometer

    • Temperature is a measure of how hot or cold something is. It is actually a measure of the amount of energy within the matter.