create foldable with three flaps on one side and four on the other
TRANSCRIPT
![Page 1: Create foldable with three flaps on one side and four on the other](https://reader035.vdocuments.us/reader035/viewer/2022062720/56649efb5503460f94c0dfba/html5/thumbnails/1.jpg)
Create foldable
with three flaps on one
side and four on the
other.
![Page 2: Create foldable with three flaps on one side and four on the other](https://reader035.vdocuments.us/reader035/viewer/2022062720/56649efb5503460f94c0dfba/html5/thumbnails/2.jpg)
Physical and Chemical Changes
![Page 3: Create foldable with three flaps on one side and four on the other](https://reader035.vdocuments.us/reader035/viewer/2022062720/56649efb5503460f94c0dfba/html5/thumbnails/3.jpg)
Review
• Matter: anything that has mass and takes up space
• Energy: ability to do work or cause change–Energy is used anytime a change in
matter occurs
![Page 4: Create foldable with three flaps on one side and four on the other](https://reader035.vdocuments.us/reader035/viewer/2022062720/56649efb5503460f94c0dfba/html5/thumbnails/4.jpg)
Kinds of Matter• The fundamental
kinds of matter interact to form everything around us. They are:– elements– compounds– mixtures
![Page 5: Create foldable with three flaps on one side and four on the other](https://reader035.vdocuments.us/reader035/viewer/2022062720/56649efb5503460f94c0dfba/html5/thumbnails/5.jpg)
Elements• Elements are substances that
cannot be broken down into other substances chemically or physically
• Examples:– sodium– oxygen– carbon– aluminum
![Page 6: Create foldable with three flaps on one side and four on the other](https://reader035.vdocuments.us/reader035/viewer/2022062720/56649efb5503460f94c0dfba/html5/thumbnails/6.jpg)
Compounds• Compounds are substances
made of two or more elements combined chemically
Compounds have properties different from those of the
original elements
• Examples:– Water: hydrogen and oxygen– Table salt: sodium and
chlorine
![Page 7: Create foldable with three flaps on one side and four on the other](https://reader035.vdocuments.us/reader035/viewer/2022062720/56649efb5503460f94c0dfba/html5/thumbnails/7.jpg)
Mixtures• Mixtures are a
combination of two or more substances that are not chemically combined. They can be separated again.
• examples– salad– frosted cake– kool-aid
![Page 8: Create foldable with three flaps on one side and four on the other](https://reader035.vdocuments.us/reader035/viewer/2022062720/56649efb5503460f94c0dfba/html5/thumbnails/8.jpg)
Properties of Matter
• Property: characteristic• There are two kinds of properties for matter:
– Physical properties– Chemical properties
physical and chemical properties are used to identify, describe, and classify matter
![Page 9: Create foldable with three flaps on one side and four on the other](https://reader035.vdocuments.us/reader035/viewer/2022062720/56649efb5503460f94c0dfba/html5/thumbnails/9.jpg)
Physical Properties• Observe physical looks of
something• Also observed without changing
the substance into something else• Examples:
– Color– Density– Shape– Boiling Point– Mass
• Can you name others?
![Page 10: Create foldable with three flaps on one side and four on the other](https://reader035.vdocuments.us/reader035/viewer/2022062720/56649efb5503460f94c0dfba/html5/thumbnails/10.jpg)
Chemical Properties• Observed only when substance is
changed and interacts with another substance
• Examples:– flammability: able to burn (reacts
with oxygen)– rusting: combining with oxygen
to form rust– Explosive: ability to explode
(reacts with oxygen)– Corrosive: ability to corrode or
wear down other substances• can you think of others?
![Page 11: Create foldable with three flaps on one side and four on the other](https://reader035.vdocuments.us/reader035/viewer/2022062720/56649efb5503460f94c0dfba/html5/thumbnails/11.jpg)
Physical and Chemical Properties Review
• What is an example of a physical property of a candle?
• What is an example of a chemical property of a candle?
![Page 12: Create foldable with three flaps on one side and four on the other](https://reader035.vdocuments.us/reader035/viewer/2022062720/56649efb5503460f94c0dfba/html5/thumbnails/12.jpg)
During a“physical change”
a substance changes some physical property…
During a“physical change”
a substance changes some physical property…
H2O
![Page 13: Create foldable with three flaps on one side and four on the other](https://reader035.vdocuments.us/reader035/viewer/2022062720/56649efb5503460f94c0dfba/html5/thumbnails/13.jpg)
…but it is still the same material with the same chemical composition.
…but it is still the same material with the same chemical composition.
H2Ogas
solid
liquid
![Page 14: Create foldable with three flaps on one side and four on the other](https://reader035.vdocuments.us/reader035/viewer/2022062720/56649efb5503460f94c0dfba/html5/thumbnails/14.jpg)
Physical and Chemical PropertiesExamples of Physical Properties
Boiling point Color Slipperiness Electrical conductivity
Melting point Taste Odor Dissolves in water
Shininess (luster) Softness Ductility Viscosity (resistance to flow)
Volatility Hardness Malleability Density (mass / volume ratio)
Examples of Chemical Properties
Burns in air Reacts with certain acids Decomposes when heated
Explodes Reacts with certain metals Reacts with certain nonmetals
Tarnishes Reacts with water Is toxic
Ralph A. Burns, Fundamentals of Chemistry 1999, page 23Chemical properties can ONLY be observed during a chemical reaction!
![Page 15: Create foldable with three flaps on one side and four on the other](https://reader035.vdocuments.us/reader035/viewer/2022062720/56649efb5503460f94c0dfba/html5/thumbnails/15.jpg)
Changes in Matter
• There are two kinds of changes in matter: – Physical changes– Chemical changes
Energy is used anytime a change in matter occurs, whether it is physical or
chemical.
![Page 16: Create foldable with three flaps on one side and four on the other](https://reader035.vdocuments.us/reader035/viewer/2022062720/56649efb5503460f94c0dfba/html5/thumbnails/16.jpg)
Physical Changes• Alters form or appearance of
material, but does not change material into brand new substance
• Examples: – chopping wood– bending wire– molding clay
• phase changes are physical changes– Melting– Freezing– Boiling– Condensing
![Page 17: Create foldable with three flaps on one side and four on the other](https://reader035.vdocuments.us/reader035/viewer/2022062720/56649efb5503460f94c0dfba/html5/thumbnails/17.jpg)
Chemical Changes• A chemical reaction
that produces new substances’
• It rearranges the atoms
• Examples:– wood burning– sour milk
![Page 18: Create foldable with three flaps on one side and four on the other](https://reader035.vdocuments.us/reader035/viewer/2022062720/56649efb5503460f94c0dfba/html5/thumbnails/18.jpg)
5 signs of a Chemical Reaction
1. Color Change 2. Energy Change 3. Precipitate Formed4. Gas Production 5. Property Change
![Page 19: Create foldable with three flaps on one side and four on the other](https://reader035.vdocuments.us/reader035/viewer/2022062720/56649efb5503460f94c0dfba/html5/thumbnails/19.jpg)
Energy
• ENERGY IS USED ANYTIME A CHANGE IN MATTER OCCURS
• Energy has many forms: – Thermal– motion– electromagnetic– electrical– chemical
![Page 20: Create foldable with three flaps on one side and four on the other](https://reader035.vdocuments.us/reader035/viewer/2022062720/56649efb5503460f94c0dfba/html5/thumbnails/20.jpg)
Chemical Change:Chemical Change:
Any change involving a rearrangement of atoms.Any change involving a
rearrangement of atoms.
![Page 21: Create foldable with three flaps on one side and four on the other](https://reader035.vdocuments.us/reader035/viewer/2022062720/56649efb5503460f94c0dfba/html5/thumbnails/21.jpg)
Chemical Reaction:Chemical Reaction:
The process of a chemical change...The process of a
chemical change...
![Page 22: Create foldable with three flaps on one side and four on the other](https://reader035.vdocuments.us/reader035/viewer/2022062720/56649efb5503460f94c0dfba/html5/thumbnails/22.jpg)
During a“chemical reaction”new materials are
formed by a change in the way atoms are bonded together.
During a“chemical reaction”new materials are
formed by a change in the way atoms are bonded together.
![Page 23: Create foldable with three flaps on one side and four on the other](https://reader035.vdocuments.us/reader035/viewer/2022062720/56649efb5503460f94c0dfba/html5/thumbnails/23.jpg)
The formation of a mixture
The formation of a mixture
The formation of a compound
The formation of a compoundChemical Change
Chemical Change
Physical Change
Physical Change
![Page 24: Create foldable with three flaps on one side and four on the other](https://reader035.vdocuments.us/reader035/viewer/2022062720/56649efb5503460f94c0dfba/html5/thumbnails/24.jpg)
Physical & Chemical Changes
Limestone,CaCO3
crushing
PHYSICALCHANGE
Crushed limestone,CaCO3
heating
CHEMICALCHANGE
PyrexPyrex
CO2
CaO
Lime andcarbon dioxide,
CaO + CO2
![Page 25: Create foldable with three flaps on one side and four on the other](https://reader035.vdocuments.us/reader035/viewer/2022062720/56649efb5503460f94c0dfba/html5/thumbnails/25.jpg)
PyrexPyrex
O2
H2O
PyrexPyrex
H2O2
Light hastens the decomposition of hydrogen peroxide, H2O2. The dark bottle in which hydrogen peroxide is usually storedkeeps out the light, thus protecting the H2O2 from decomposition.
Sunlight energy