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Ch. 2 Physical and Chemical Properties/Changes

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Page 1: Ch. 2 Physical and Chemical Properties/Changes. Properties Physical Property – can be observed without changing the identity of the substance color texture

Ch. 2 Physical and Chemical Properties/Changes

Page 2: Ch. 2 Physical and Chemical Properties/Changes. Properties Physical Property – can be observed without changing the identity of the substance color texture

Properties

• Physical Property– can be observed without changing

the identity of the substance• color• texture• density• viscosity• change in state• solubility• malleability• mass• volume

• Chemical Property– describes the ability of a substance to

undergo changes in identity– A new substance is produced

• reactivity• toxicity• pH• conductivity• tarnishing• fermenting• oxidation

There are properties that are used to describe matter.

Page 3: Ch. 2 Physical and Chemical Properties/Changes. Properties Physical Property – can be observed without changing the identity of the substance color texture

• Examples:– viscosity

– reactivity

– density

– solubility

– tarnishing

physical

chemical

physical

physical

chemical

Properties

Page 4: Ch. 2 Physical and Chemical Properties/Changes. Properties Physical Property – can be observed without changing the identity of the substance color texture

Matter’s Changes• Physical Change

– properties remain the same

– changes the form of a substance without changing its identity

– All changes in state! (freeze, melt, condense, evaporate, and sublimate)

– Examples:• Boil, dissolve, break, split, crack, grind, cut, crush, and

bend.

Page 5: Ch. 2 Physical and Chemical Properties/Changes. Properties Physical Property – can be observed without changing the identity of the substance color texture

• Chemical Change– changes the identity of a substance– a new substance is produced– Examples: • rust, rot, burn, decompose, corrode, oxidize, ferment,

and explode!

– Evidence of a chemical change:• change in color or odor, formation of a gas, formation

of a precipitate (solid), change in light or heat

Matter’s Changes

Page 6: Ch. 2 Physical and Chemical Properties/Changes. Properties Physical Property – can be observed without changing the identity of the substance color texture

• A physical change during digestion is the mechanical breaking up of food by teeth.

• A chemical change during digestion is the chemical breaking down of food in the mouth, stomach and small intestine with the aide of enzymes.

Matter’s Changes

Page 7: Ch. 2 Physical and Chemical Properties/Changes. Properties Physical Property – can be observed without changing the identity of the substance color texture

• Examples:– rusting iron

– dissolving in water

– burning a log

– melting wax

– grinding spices

chemical

physical

chemical

physical

physical

Matter’s Changes

Page 8: Ch. 2 Physical and Chemical Properties/Changes. Properties Physical Property – can be observed without changing the identity of the substance color texture

Physical & Chemical Changes Game

Chemical

Page 9: Ch. 2 Physical and Chemical Properties/Changes. Properties Physical Property – can be observed without changing the identity of the substance color texture

Physical & Chemical Changes Game

Physical

Page 10: Ch. 2 Physical and Chemical Properties/Changes. Properties Physical Property – can be observed without changing the identity of the substance color texture

Physical & Chemical Changes Game

Chemical

Page 11: Ch. 2 Physical and Chemical Properties/Changes. Properties Physical Property – can be observed without changing the identity of the substance color texture

Physical & Chemical Changes Game

Physical

Page 12: Ch. 2 Physical and Chemical Properties/Changes. Properties Physical Property – can be observed without changing the identity of the substance color texture

Physical & Chemical Changes Game

Physical

Page 13: Ch. 2 Physical and Chemical Properties/Changes. Properties Physical Property – can be observed without changing the identity of the substance color texture

Physical & Chemical Changes Game

Chemical

Page 14: Ch. 2 Physical and Chemical Properties/Changes. Properties Physical Property – can be observed without changing the identity of the substance color texture

Physical & Chemical Changes Game

Physical

Page 15: Ch. 2 Physical and Chemical Properties/Changes. Properties Physical Property – can be observed without changing the identity of the substance color texture

Physical & Chemical Changes Card Game

Physical

Page 16: Ch. 2 Physical and Chemical Properties/Changes. Properties Physical Property – can be observed without changing the identity of the substance color texture

Physical & Chemical Changes Game

Chemical

Page 17: Ch. 2 Physical and Chemical Properties/Changes. Properties Physical Property – can be observed without changing the identity of the substance color texture

Physical & Chemical Changes Game

Physical

Page 18: Ch. 2 Physical and Chemical Properties/Changes. Properties Physical Property – can be observed without changing the identity of the substance color texture

Physical & Chemical Changes Game

Physical

Page 19: Ch. 2 Physical and Chemical Properties/Changes. Properties Physical Property – can be observed without changing the identity of the substance color texture

Physical & Chemical Changes Game

Chemical

Page 20: Ch. 2 Physical and Chemical Properties/Changes. Properties Physical Property – can be observed without changing the identity of the substance color texture

Physical & Chemical Changes Game

Chemical

Page 21: Ch. 2 Physical and Chemical Properties/Changes. Properties Physical Property – can be observed without changing the identity of the substance color texture

Physical & Chemical Changes Game

Physical

Page 22: Ch. 2 Physical and Chemical Properties/Changes. Properties Physical Property – can be observed without changing the identity of the substance color texture

Physical & Chemical Changes Game

Chemical

Page 23: Ch. 2 Physical and Chemical Properties/Changes. Properties Physical Property – can be observed without changing the identity of the substance color texture

Physical & Chemical Changes Game

Physical

Page 24: Ch. 2 Physical and Chemical Properties/Changes. Properties Physical Property – can be observed without changing the identity of the substance color texture

Learning Check

Which of the following changes involved in manufacturing an automobile is a chemical change?

a. applying paint to the body of the automobileb. making plastics from petroleum productsc. making steel from iron, carbon, and other metalsd. rolling out steel into sheets

Page 25: Ch. 2 Physical and Chemical Properties/Changes. Properties Physical Property – can be observed without changing the identity of the substance color texture

Learning Check

Which of the following is a physical change?

a. aluminum oxidizingb. an acid and a base forming a salt and waterc. ice cream meltingd. paper burning

Page 26: Ch. 2 Physical and Chemical Properties/Changes. Properties Physical Property – can be observed without changing the identity of the substance color texture

Learning Check

In the rock cycle, which of these is a chemicalchange involved with the formation of igneousrocks?F Compression of sedimentsG Heat loss from lavaH Subduction of platesJ Formation of minerals

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