Lab tools and scientific investigation
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Lab tools and Scientific Investigation. Earth Science Unit 1: Scientific Investigation. Main Lab Tools that you must be familiar with include: beaker , graduated cylinder, test tube, test tube tongs, meter stick, balance/scale, goggles, and Erlenmeyer flask. Beakers.

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Lab tools and scientific investigation

Lab tools and Scientific Investigation

Earth Science Unit 1: Scientific Investigation


Lab tools and scientific investigation

Main Lab Toolsthat you must be familiar with include: beaker, graduated cylinder, test tube, test tube tongs, meter stick, balance/scale, goggles, and Erlenmeyer flask


Beakers

Beakers

  • Used for holding, mixing and sometimes measuring chemicals

  • Unit used: milliliter (mL)


Graduated cylinder

Graduated cylinder

  • Used for measuring the volume of liquids.

  • Very precise measurements

  • Unit used: mL


Test tube

Test tube

  • A finger-like length of glass, open a the top and usually a rounded U-shaped bottom.

  • Sometimes used for boiling liquids


Tongs

tongs

  • Use the test tube tongs to hold the test tube while heating liquids.


Meter stick

Meter stick

  • A meter long stick or ruler

  • Marked off in centimeters

  • Used for measuring the length of objects


Triple beam balance

Triple beam balance

  • An scale used to find or measure the mass in objects

  • Unit of measure is grams


Goggles

goggles

  • Always wear goggles when working with liquids—even water.

  • Goggles protect eyes from chemicals and solids that may be a result of a lab or someone horse playing.


Erlenmeyer flask

Erlenmeyer flask

  • Used for holding, mixing, and heating chemicals

  • Hard to tip over

  • Unit: mL


Wafting

wafting

  • a safe way to identify an unknown chemical.

  • bring the container towards your chin, while gently swirling the liquid around

  • wave the fumes slowly towards your nose.

  • Breathe normally.

  • NEVER stick your nose into a container of an unknown chemical!!! Nose, lung, throat or eye damage could result.


4 question strategy

4-question strategy

  • What materials are available to conduct experiments?

  • How does _____ act?

  • How can I change ______ to affect the action? (IV)

  • How can I measure the response of __________ to show change. (DV)


Hypothesis

hypothesis

  • A prediction about the outcome of an experiment.

  • If/then

  • If=independent variable

  • Then=dependent variable


Independent variable

Independent variable

  • The onefactor scientists change during an experiment.


Dependent variable

Dependent variable

  • The factor that changes as a result of the independent variable in an experiment.

  • The measurement of the growth of the plant is the dependent variable.


Constants

constants

  • The part of the experiment that is kept exactly the same during each of the repeated trials of an investigation.


Conclusion

conclusion

  • What was the purpose of the experiment?

  • Did the data support your hypothesis?

  • Why do you think you got these results?

  • What might you change next time?


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