Classifying Matter Review

Unit 2: Matter

Review​

We will cover all topics that will appear on the test, as well as discuss strategies to help you study and create an amazing note card.

Properties of matter

Physical properties

Can be observed without changing the substance

Intensive physical properties- do NOT depend on the amount of matter present. (color, conductivity, malleability, hardness, density...)

Extensive physical properties- do depend on the amount of matter present. (mass, volume, length...)​

Properties of matter

Chemical properties

Can only be observed when the substance undergoes a chemical reaction and creates a new substance. (flammability, corrosiveness, reactivity...)

Multiple Choice

The amount of matter in an object

• Volume

• Mass

• Density

Multiple Choice

The ratio of an objects mass to its volume is known as

• compactness

• density

• state of matter

Multiple Choice

You make the following observation:

The substance is made of small, white crystals that are very brittle when touched.

What are you observing about the substance?

• Its chemical properties

• Its physical properties

Multiple Choice

You make the following observation:

The substance reacts and creates bubbles when it comes in contact with an acid.

This is an example of

• Chemical properties

• physical properties

Multiple Choice

Which is a type of physical property which would not change with the size of your sample?

• Color

• volume

• mass

• reactivity

Multiple Choice

Which an example of a chemical property

• color

• Size

• Volume

• radioactivity

​Changes in matter

Physical changes

a change that does not affect what the substance is.

No change to the molecular structure

(change in state, cutting, shaping, stretching...)​

Changes in matter

Chemical changes

A change that occurs at the molecular level.

Changing to a new substance (burning, reacting, corroding, oxidation...)

Color change, odor produced, a solid precipitate formed in a liquid, and gas produced are some examples of evidence that a chemical change​ occurred.

Some text here about the topic of discussion

Multiple Choice

Paper burning is an example of

• Chemical change

• physical change

Multiple Choice

cutting paper is an example of

• Chemical change

• physical change

Multiple Choice

A chemical change occurs when

• a new substance is created

• the shape of a substance changes

• The size of the substance changes

• The phase (solid, liquid, gas) of the substance changes

Multiple Choice

Which of the following is not evidence of a chemical change?

• Color change

• odor produced

• size changes

• new solid precipitate is formed

Multiple Choice

Which of the following is an example of a physical change

• wood burning

• food digesting

• cutting hair

• egg cooking

Multiple Choice

Which of the following is an example of a chemical change

• grass decaying

• chopping wood

• curling hair

• coloring paper

Classifying matter

Mixtures

multiple substances put together

can be separated using physical means (distillation, filtration, sifting,...)

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Classifying matter

Mixtures- Homogeneous

Same through out

another name for homogeneous mixtures is solutions

cannot see the different components​

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Classifying matter

Mixtures- Heterogeneous

different throughout

Components have different sizes, shapes, colors, and states

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Classifying matter

Pure substances

Contains only one type of substance

Substance can only be separated by chemical reations​

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Classifying matter

Pure substances- Compounds

Contain more than one type of atom

Names include multiple elements or compounds

Chemically combined elements​

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Classifying matter

Pure substances- Elements

Contains only one type of atom

Can be found on the periodic table of elements.

most basic form of matter​

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Multiple Choice

Salt is an example of

• A homogeneous mixture

• A heterogeneous mixture

• A compound

• An element

Multiple Choice

Carbon is an example of a(n)

• homogeneous mixture

• heterogeneous mixture

• compound

• element

Multiple Choice

How can you determine if a substance is a mixture?

• It is made of more than one substance and can be separated by physical means

• It is made of only one type of substance and cannot be separated by physical means

• There is no way to tell

Multiple Choice

How can you determine if a substance is a pure substance?

• It is made of more than one substance and can be separated by physical means

• It is made of only one type of substance and cannot be separated by physical means

• There is no way to tell

Multiple Choice

How can you determine if a pure substance is a compound?

• It is evenly mixed

• It is made of only one type of atom

• It is made of more than one type of atom

• You can see every atom

Multiple Choice

How can you determine if a pure substance is an element?

• It is evenly mixed

• It is made of only one type of atom

• It is made of more than one type of atom

• You can see every atom

Multiple Choice

How can you determine if a substance is a homogeneous mixture?

• It exists in only one state and you cannot see the difference between the components

• It exists in multiple states and you can see the different components

• It is made of only one substance

• It is made of only one type of atom

Multiple Choice

How can you determine if a substance is a heterogeneous mixture?

• It exists in only one state and you cannot see the difference between the components

• It exists in multiple states and you can see the different components

• It is made of only one substance

• It is made of only one type of atom

Density

Density = mass / Volume​

other ways to write the equation

Mass = Density x Volume​

or

Volume = Mass / Density​

Multiple Choice

Which is the correct formula for density

• D = m x V

• D = m / V

• D = m + V

• D = m - V

Multiple Choice

If an abject has a Density of 11.3 g/mL and a mass of 24.2g, what is the objects volume?

• 2.14 mL

• 11.3 mL

• 273.6 mL

• 00467 mL

Multiple Choice

A 3cm cube has a density of 8.9 g/cm³ what is the mass?

• 0.337g

• 3.03g

• 26.9g

• 240.3

Multiple Choice

If an object has a mass of 23.4 g and a volume of 4.5 mL. what is its density

• 5.2 g/mL

• 105.3 g/mL

• 0.19 g/mL

• 27.9 g/mL