Grade 7 agenda:
Copy your homework into your agenda.
Please get out your density HW problems
I am collecting it.
Get a copy of “What is the density of wood?”
Complete the pre-lab activity on the worksheet
Collect HW - Density Problems.
Introduce “What is the density of wood.”
Show Brainpop Buoyancy.
Assign teams and stations.
Grade 8 agenda:
Quiz on Friday: Physical Changes to Matter
Define physical change.
describe and Give examples if physical changes to matter
changes in appearance, size, shape, etc
dissolving - making solutions
changes in state between solid, liquid, and gas
melting - freezing
boiling - condensing
sublimation - deposition
The Law of Conservation of Mass
complete the lesson three review on page 401 of the text (see image below
use the handout version of the text given to you last week as a support.
Slant: physical changes to matter
physical change: any change which alters the form or appearance of matter but does not change its identity
size or shape
changes in state occur when thermal energy is added or taken away
dissolving is a physical change
a sample of matter with breaks up into its individual particles and mixes evenly with another substance
mass is always conserved during physical changes
Conservation of Mass
Mass is conserved during any physical or chemical change
this assumes the change occurs in a closed system
matter cannot enter or leave
all the same particles are present
only the arrangement, location, or motion of the particles can change.
Time to complete lesson review.