Language of Science

1
Language of Science

• Quiz Review

2
Where can I find the information to study for the
quiz?

• Notes on observations (includes quantitative and
  qualitative)/Candle Lab
• Notes on inferences (includes examples from
  notes)
• Observation and Inference Lab (includes
  reappearing coin and curious cup)
• Lab Equipment and Metric Lab Worksheet

3
What is an observation?

• Making sense of something by using your senses

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Do we only use our eyes to make observations?
What else do we use?

• No
• We also use our other senses to make observations

5
        What is the difference between
quantitative and qualitative observations? Be
able to give examples.

• Quantitative observations involve measurements or
  numbers. Qualitative observations do NOT use
  measurements or numbers.

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Examples of quantitative observations

• The teacher is 6 feet tall.
• There are 25 pieces of candy in the jar.
• The paper is 8.5 inches wide and 11 inches tall.

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Examples of Qualitative Observations

• The sky is blue.
• The plate is round.
• The pillow is soft.
• The classroom smells like burned matches.

8
Why is it sometimes hard to make an accurate
observation? (hint optical illusions)

• Your perspective can affect your observation.
• Distance
• Obstruction
• Personal bias
• Other distractions

9
Why is it important for a scientist to know the
difference between and observation and an
inference?

• If they dont know the difference it would make
  it hard to communicate accurate information.
  Another person may interpret your inference as an
  observation.

10
What are some of the safety rules we must follow
in a lab?

• Examples
• Wearing goggles
• follow all directions
• do not run or chase
• clean up all spills
• notify the teacher if glass breaks
• do not taste or smell an unknown substance
• take fire seriously and follow all rules for
  lighting matches

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Safety, cont.

• How should we approach unknown substances with
  caution?
• Never smell, touch, taste or inhale an unknown
  substance
• What are rules for lighting a match?
• Secure all loose articles of clothing and hair
• Strike match going away from your body
• Do not play with matches ever!
• Do not light anything other than what you are
  directed to light
• FOLLOW ALL DIRECTIONS

12
Be able to identify and know the purpose of the
different lab equipment used in class.

• Beaker-hold/store liquids
• Erlenmyer flask-swirl liquids
• Graduated cylinder-measure volume
• Ruler/meter stick-measure distance
• Balance-measure mass
• Thermometer-measure temperature
• Test tube-creating and witnessing reactions

13
What is wafting? Why do we use this process?

• Wafting is when you wave the fumes towards your
  nose.
• We use this method to identify an unknown liquid
• Never put your nose directly over the liquid,
  you could damage the lining of your nose.

14
Be able to read the measurement from a balance, a
ruler, a graduated cylinder, and a thermometer
(remember to always include the correct unit
label!)

• Unit Labels
• Temperature? degrees Celsius
• Distance? meters (mm, cm, m, km)
• Volume? Liters (mL, L)
• Mass?grams (mg, g, kg)

15
What do we use in science to measure each of
the following?

• Mass balance

• Temperature thermometer

• Length meter stick/ruler

• Volume graduated cylinder