cp chemistry types of observations

To do: Write todays date and objective on a new page in your notebook

8-15-17

Objective: I can distinguish between quantitative and qualitative observations

Quiz moved to Thursday

To aid in your notetaking

• Notes are in purple and underlined

8.15.17 Objective: I can distinguish between quantitative and qualitative observations

1. Make as many observations as you can of a candle.

2. Please be careful.3. You have 6 minutes.

8.15 Objective: I can distinguish between quantitative and qualitative observations

Types of Observations• Scientists make objective observations (without

opinion or bias) using their senses and instruments• Scientists avoid subjective observations (opinions)Ex (Objective): Matt has dark hair and brown eyes. Matt is 5’6”.Nonex (Subjective): Matt is cute. Matt is tall.

Explain why the example is an objective observation. Defend your reasoning with reference to notes.

This is an objective observation because ____

Explain why the nonexamples are subjective observations . Defend your reasoning with reference to notes.

This is a subjective observation because ____

you can see his hair and eye color

Types of Observations

Qualitative observations are not number based Ex. Jennifer Lawrence has blonde hair. Ex: Princess Kate is wearing blue.

Come up with your own qualitative observation about JLaw or the royal family.

Types of Observations

Quantitative observations use instruments and contain numbers Ex: JLaw is 5 ft 9 in tall. Ex: The royal baby weighed 8 lbs, 6 oz.

Come up with your own quantitative observations about JLaw or the royal family.

Qualitative or Quantitative

The temperature of the room increased by 8º Celsius.

This is a ________________ observation because ____________________8oC is a measured number

quantitative


The fireworks were loud.

This is a ________________ observation because ____________________loud describes a sound, and

there are no numbers

qualitative


The leaf veins are 3 mm wide.

This is a ________________ observation because ____________________3 mm is a measured number

quantitative


The rose has a sweet smell.

This is a ________________ observation because ____________________sweet describes an odor, and

there are no numbers

qualitative


The flower clusters in three blooms.

This is a ________________ observation because ____________________3 is a number

quantitative

Qualitative (L) or Quantitative (N)

Juan wants to build his muscle mass. He made a list of observations he should record to keep track of his progress. Which of these are Quantitative observations he can make?

1. Weight

2. How fat/skinny he looks

3. Bicep diameter

4. Daily caloric intake

5. Types of food he eats

Back to your candle observations

• Go back to your list of observations about the candle.

• For each observation, underline those that are quantitative

• Circle any qualitative observations

1.READ the description of a burning candle done by a chemist.

2.Compare your observations with those of a professional chemist. How

are they similar? How are they different?

3.What did the chemist do that you did not?

4.List at least THREE ways that you can improve your observations.

5. Annotate by highlighting qualitative observations and

quantitative observations with TWO different colors.

Write your answers at the BOTTOM of the page AND

NUMBER them.

Compare and contrast valid qualitative and quantitative observations.

objective

numbers

instruments

senses

sight

Qualitative Quantitative

measurements

quantity

sound

hearing

taste

touch

not opinion

Make a Venn diagram and write the headings

Write what is the same in the middle

Write what is the different on the sides different

Did you meet today’s objective?

If we have time

• Work on your flashcards – due tomorrow

• Quiz Thursday

cp chemistry types of observations

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