August 31, 2011
Bellringer: Place in your Homework
A 10 ml sample of a substance has a mass
of 20 g. What would be the mass of a
100 ml sample of the same substance?
Earth Science
•
Objectives:
•
• Determine the
difference between•
an observation and •
inference
•
•
Agenda
Go over Density
Worksheet
Observation/Inference
notes
Mr. Peanut activity
Review for test
Homework:
Turn in Measurement
lab
Study for test
Earth Science
Observations
• recognizing and noting some FACT to
gather information about the world
Earth Science
You make observations
using your five senses
• Sight - Detects
color, size, and
shape.
• Hearing Reaction to
moving air
• Taste - Sweet,
salty, bitter,
sour.
• Smell - Reaction
to gases.
• Touch - Reaction
to pressure,
temperature.
• We are not
sensitive enough
to detect high
sounds or radio
waves.
Earth Science
Observations must be specific
and accurate, not relative, so
that it means the same to
everyone.
• Example:
– Incorrect - the burning bag
smelled nasty
– Correct - the burning bag
smelled similar to rotten eggs
Earth Science
Inference
• a possible explanation or guess
about an observation
• Example: you leave the movie theater
and see the ground is wet so you
infer that it rained.
Earth Science
Look at the picture below and
write three observations and
two inferences
Earth Science
Mr. Peanut
• Wait for
directions
• When making
observations be
as specific as
possible!
Earth Science
Review for Test
• http://sciencereviewgames.com/srg/s
ubjects/nos.php
Earth Science
Ticket out the Door
• Make three flashcards to begin
studying for tomorrow’s test!
• Reminder:
– Test is Tomorrow
– Topics include:
» Scientific method
» Graphing
» Measurement
» Density
» Observation/inference
Earth Science