catalyst (4 min)
DESCRIPTION
Catalyst (4 min). Answer the following question on your catalyst sheet: Determine whether the following images are elements, compounds or mixtures:. 1. 2. 3. Catalyst Discussion. Determine whether the following images are elements, compounds or mixtures:. 1. 2. 3. MIXTURE. COMPOUND. - PowerPoint PPT PresentationTRANSCRIPT
Catalyst (4 min)
Answer the following question on your catalyst sheet:
Determine whether the following images are elements, compounds or mixtures:
1 2 3
Catalyst Discussion
Determine whether the following images are elements, compounds or mixtures:
1 2 3
MIXTURE COMPOUND ELEMENT
Observations and Inferences
9/13/101. Catalyst2. Chemistry and Matter3. Observations
Cornell NotesCornell Notes
Cornell NotesCornell NotesMs. AkagiIntro to Chemistry
9/13/09
States of Matter
Chemistry
• Solid• Liquid• Gas
• Solid• Liquid• Gas
What do we do in chemistry?
We ask questions We observe what’s going on around us We make inferences and conclusions from our
observations!
Most every problem can be solved if you take the proper steps and if you are as detailed as possible
Observation
A note or description of an object or occurrence
FACTS! Not opinions!
More observations
= more information
= more we can learn
That almond is brown and has a grooved texture
Inference
A guess about an object or outcome based on your observations
This can be a scientific opinion
That almond looks delicious
Practice:
On your notes (NOT OUT LOUD), quickly write down whether the following examples are OBSERVATIONS or INFERENCES
1. The leaves are green
2. I think it’s spring
3. The Cubs scored 2 runs
Observation
Inference
Observation
Qualitative Observations
Observations in which we use our senses (sight, smell, touch, taste, hearing, etc)
Examples: the sky is blue in color the water tasted saltyThe fire made a crackling sound
Quantitative Observations
Observations that are measurable (have numbers)
We use tools to get these measurements!Rulers (2 ft long)Thermometers (34˚ C)Scales (25 lbs)
My hand is 4 inches wide
Practice:
On your notes (NOT OUT LOUD), quickly write down whether the following observations are QUANTITATIVE or QUALITATIVE
1. The apple has brown spots2. There are 5 apples on the counter3. Jose got 80% on the quiz!
Qual.Quant.
Quant.
Homework (due tomorrow)1. Finish the worksheet2. Select an object at home and describe that
object in a paragraph (complete sentences!) Write at least 4 qualitative observations Write at least 4 quantitative observations At least 8 observations total! Note: DO NOT indicate which observations are
qualitative or which are quantitative If someone can guess your object, you get extra
credit! So make sure you are detailed in your descriptions!