Observations How we look at things in science What is observation? Observations are made in science. They are made by using: Senses Tools increase accuracy & precision Facts not opinions.
Two types of Observation Qualitative Quantitative Qualitative Observations Hard to measure Describes the qualities of something Color Taste Sound Quantitative Observations
Can be expressed in numbers Can be counted or measured Amounts Temperature Mass Length
Allow us to communicate specifics Tools are used to communicate data Observations are collected in data tables Inference Drawing a conclusion based on data and observation The process of drawing a conclusion from given evidence. Practice: Observations: I hear people screaming
I smell cotton candy, popcorn, and hamburgers I see a lot of people Inference = ? Observation That plant is extremely wilted. The car stopped running The Diamondbacks are
leading their division Inference That plant is extremely wilted due to a lack of water. The car stooped running because it was out of gas. The Diamondbacks are leading their division because they are playing well right now.
Observation or Inference 1. There is a representation of a face on one side of the coin. 2. The Latin word "Dei" means "God. 3. The coin was made by deeply religious people. 4. The date 1722 is printed on one side of the coin. 5. The coin was made in 1722.
6. The face on the coin is a representation of the nation's president. Lets Practice. Look at the picture & decide if the statement is an OBSERVATION OR INFERENCE The narrow windows were used as rifle slits.
n e r e f In e c There was a garden located
outside the Citadel. s b O v r e n o
i t a Gardens were an important part of everyday life during the military years on Alcatraz Island n e r e f
In e c . People in the garden are in mourning. n e r
e f In e c Men were required to wear jackets and women were required to wear dresses n e
r e f In e c The citadel was made of brick. s b
O v r e n o i t a
There is a picket fence. s b O v r e n o
i t a People used to spend more time outside. n e r e f
In e c There are eight people in the photograph. s b O
v r e n o i t a The garden provided food for the families living on Alcatraz.
n e r e f In e c There were no cannons on Alcatraz..
s b O v r e n o i
t a Look at these two sets of animal tracks. List 3 OBSERVATIONS Make an INFERENCE Now what do you think? Make 3 OBSERVATIONS Make an INFERENCE
Now what do you think? Make 3 OBSERVATIONS Make an INFERENCE When to use observation & inference During experiments, record observations NOT inferences Inferences may be used when writing the conclusion in your lab
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