1. Today is Thursday 3/21
Learning Target: I can explain the properties of matter and how they change.
Homework: Study Guide Day 3 Sample Questions (answer on your study guide AND on google classroom)
You will need:
Pencil
Day 3 Study Guide
Day 3 Notes

3. Physical Properties: characteristics that can be observed _______________ changing the identity of the substance.
State of matter
_________ : atoms are tightly and uniformly packed together
_________ ; atoms are not as tightly packed together and move faster
_________ ; atoms are spread out and move very quickly
without
solid
liquid
gas

4. Density: a measure of ____________ over ____________
Density: a measure of ____________ over ____________. Aka: how __________ packed molecules are.
The more dense something is the more ___________ the molecules are.
More dense = sinks, less dense = floats
Boiling Point: The temperature at which a _____________ turns into a ____________.
Melting Point: The temperature at which a ____________ becomes a ____________.
Solubility: How easily something _________________.
Some things are _____________ and cannot dissolve (sand, flour, etc.)
mass
volume
packed
liquid
gas
solid
liquid
dissolves
insoluble

5. Chemical Properties: characteristics that describe a substance’s ability to ____________ and can only be observed by changing the ________________ of the substance.
Reactivity: how likely a substance is to react with another substance.
pH: how __________ something is.
pH scale: a scale from 0-14 that tells how acidic something is. 7 is neutral (water), anything less than 7 is an __________________ and anything greater than 7 is a _____________.
To make something more acidic (decrease the pH) you add an acid.
To increase the pH (make it more basic) you add a base.
Oxidation: if a substance reacts with ____________.
Ex: rust
change
identity
acidic
acid
base
oxygen

6. Signs/Evidence of a Chemical Reaction: A new substance is ALWAYS formed (because the __________ of the substance changes.
Precipitate forms (____________ forms)
Gas forms (substance bubbles like baking soda and ___________)
Color change: ex- when something ___________ or rusts, it turns orange/brown
Heat change: ___________= substance gets colder, ____________= substance gets hotter.
identity
solid
vinegar
oxidizes
endothermic
exothermic

7. Elements, Compounds, Mixtures
Element: on the periodic table, made of only one kind of __________. Not combined with anything else.
Compound: 2 or more elements ________________ combined.
Mixture: 2 or more substances ________________ combined.
Homogeneous mixture: uniformly combined/mixed
Ex: __________________
Heterogeneous mixture: NOT uniformly combined/mixed
atom
chemically
physically
coffee
Trail mix

8. Periodic Table Organization
_____________: vertical columns on the periodic table. Elements in the same ________ have similar characteristics.
_____________: horizontal rows on the periodic table.
groups
group
periods
Atomic # =# of protons
Atomic mass = # of protons + # of neutrons
# of protons = # of electrons

9. Homework: Complete Sample Questions on Study Guide and put your answers on the google form!!!
You can submit multiple times so after you submit it go back and check your work and make corrections!!!