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Arrangement of Matter. Unit 2 – Continued 7 th Grade Science. water : plants :: host : . party restaurant game show parasite. IV. Properties of Matter. A. Physical Properties 1. Mass (weight) – Amount of matter in an element or object. 2. Volume – The space an object takes up. - PowerPoint PPT Presentation
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ARRANGEMENT OF MATTER
Unit 2 – Continued7th Grade Science
water : plants :: host :
party
resta
urant
game sh
ow
parasite
14%
43%38%
5%
1. party2. restaurant3. game show4. parasite
IV. Properties of Matter
A. Physical Properties1. Mass (weight) – Amount of matter in an element or object.
2. Volume – The space an object takes up.
A. Physical Properties3. Density – How much mass there is in a certain volume
Formula – D = M/V
A. Physical Properties4. Boiling Point – The temperature at which a substance boils.
5. Melting Point – The temperature at which a substance melts.
6. State of Matter – Solid, Liquid, or Gas
B. Chemical Properties1. Burning
2. Radioactivity
3. Rotting
4. Rusting
5. Curdling
V. How Can Matter Be Changed?
A. Physical vs. Chemical Change
1. Physical Change - Change from one state to another state. Does not change the original form. NO NEW SUBSTANCE!2. Chemical Change - Change to form a NEW SUBSTANCE…CANNOT BE REVERSED!
Physical Change WordsCutTearFoldPaintMeltBoilEvaporateSublimateGrind
Chemical Change Words
BurningRottingRustingCurdlingReactingRadioactive
C. Signs of Chemical Change
1. Heat given off2. Color change3. Smell4. Light given off5. Bubbles form6. Heat required for the reaction7. Precipitate forms (solid formed from
reaction)8. New Substance forms
D. Example of a Chemical Change
CaCl2 + 2 Na HCO3 = CaCO3 + 2 NaCl + H
Is it balanced? How can you check?
Which is an example of a physical change?
An apple cu
t in half
An apple ro
tting
An apple bakin
g
An apple rip
ening
41%
14%9%
36%1. An apple cut in
half2. An apple rotting3. An apple baking4. An apple ripening
Which is an example of a chemcial change?
Ice m
elting
Oil boilin
g
Water c
ondensing
Milk
spoilin
g
32%
58%
0%
11%
1. Ice melting2. Oil boiling3. Water condensing4. Milk spoiling