Matter & Energy Chapter 2 Review Begin. Which of the following is NOT an example of a physical property? Mass Shape Color Rust.

Matter & EnergyMatter & EnergyChapter 2 ReviewChapter 2 Review

Begin

Which of the following is NOT Which of the following is NOT an example of a physical an example of a physical

property?property?

Mass

ShapeColor

Rust

Good Good Work!Work!

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Sorry, wrong answer!

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Density

Volume Area

Mass

The measure of the amount of matter an object contains within a given volume is

called?

Good Good Work!Work!

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A box of feathers A box of pennies

Which item has a lower density?

Good Work!Good Work!A box of feathers has a lower density than a A box of feathers has a lower density than a

box of pennies because the volume of box of pennies because the volume of feathers has a lower mass than an equal feathers has a lower mass than an equal

volume of pennies.volume of pennies.

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Change in size

It disappears

Production ofan odor

Which of the following examples is a clear sign that a chemical change has

occurred?

The weight has changed

Good Work!Good Work!Chemical changes may produce new smells. For Chemical changes may produce new smells. For

example, rotting eggs produce the smell of sulfur.example, rotting eggs produce the smell of sulfur.

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True False

True or False: Changes of state are physical changes.

Good Work!Good Work!•A solid can change into a liquid substance, and a liquid can A solid can change into a liquid substance, and a liquid can

turn into a solid substance.turn into a solid substance.•A liquid can change into a gas, and a gas can turn into a A liquid can change into a gas, and a gas can turn into a

liquid.liquid.

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Melting point

Evaporation

Freezing point

The point at which a solid's particles vibrate fast enough to break away from

each other and turn into a liquid is called?

Sublimation

Good Work!Good Work!The melting point of some solids is well-defined, such as The melting point of some solids is well-defined, such as those for ice and steel. These substances have orderly those for ice and steel. These substances have orderly

structures, so melting will start at a specific temperature. structures, so melting will start at a specific temperature. Other substances, such as chocolate and plastic, melt Other substances, such as chocolate and plastic, melt

gradually over a wide range of temperatures.gradually over a wide range of temperatures.

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True False

True or False: The melting point and freezing point of a substance is the

same.

Good Work!Good Work!Above the melting/freezing point, the substance is a Above the melting/freezing point, the substance is a

liquid; below the melting/freezing point, the substance liquid; below the melting/freezing point, the substance is a solid. At the melting/freezing point, the substance is a solid. At the melting/freezing point, the substance

can be either solid or liquid.can be either solid or liquid.

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Condensation

Evaporation

Melting

What is the process by which a liquid becomes a gas?

Sublimation

Good Work!Good Work!Particles in liquids move at different speeds. The Particles in liquids move at different speeds. The

fastest moving particles can escape from the surface fastest moving particles can escape from the surface of a liquid. Since warmer liquids have faster moving of a liquid. Since warmer liquids have faster moving particles, evaporation occurs more quickly when a particles, evaporation occurs more quickly when a

substance is warmer. For example, water evaporates substance is warmer. For example, water evaporates more quickly on a warm day than a cool day.more quickly on a warm day than a cool day.

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Condensation

Evaporation

Melting

What is the process by which a solid turns directly into a gas?

Sublimation

Good Work!Good Work!Dry ice, which is frozen carbon dioxide, turns directly into Dry ice, which is frozen carbon dioxide, turns directly into

carbon dioxide gas under normal conditions.carbon dioxide gas under normal conditions.

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Melting point

Solubility

Density

What is the measure of how well a solid dissolves in a liquid?

ChemicalChange

Good Work!Good Work!For example, a spoonful of sugar dissolves in water very For example, a spoonful of sugar dissolves in water very

easily if you pour it in and stir it with the spoon. Much of a easily if you pour it in and stir it with the spoon. Much of a spoonful of dirt will settle to the bottom of a glass of water spoonful of dirt will settle to the bottom of a glass of water

when you stop stirring.when you stop stirring.

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5.0 g/cm³

5.7 g/cm³

4.8 g/cm³

11.0 g of pure gold has a volume of 2.00 cm³. What is the density of gold?

5.5 g/cm³

Good Work!Good Work!Density=Mass/Volume. 11.0 g divided by 2.00 cmDensity=Mass/Volume. 11.0 g divided by 2.00 cm³ is 5.5

g/cm³.

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Breaking a ball ofclay into 2 pieces

Baking a cake

An ice cube melting

Which of these is a chemical change, not a physical change?

Water boiling

Good Work!Good Work!Changing from one state to another is a physical change.Changing from one state to another is a physical change.

Burning, cooking, baking, and rusting are examples of Burning, cooking, baking, and rusting are examples of chemical changes. chemical changes.

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Ice cream in a freezerslowly forms ice

crystals

Grass wet with dew slowly dries in themorning sunshine

Just-washed handsare rubbed on a

towel

An example of evaporation is when:

Eggs are hard-boiled

Good Work!Good Work!

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Solid

The melting point of aluminum is 660°. Is aluminum a solid or a liquid at room

temperature (23°)?

Liquid

Good Work!Good Work!If aluminum’s melting point is 660If aluminum’s melting point is 660°, then it will remain a °, then it will remain a

solid until it reaches that temperature.solid until it reaches that temperature.

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Creates a differentsubstance but not

different physical properties

Does not change eitherthe substance or itsphysical properties

Creates a differentsubstance with

different physical properties

A physical change in a substance:

Changes a physical

property but not the substance itself


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Condensation

Freezing

Melting

As a solid heats up, its particles gain energy and vibrate. When they vibrate enough, the particles move away from

one another. That describes:

Boiling


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Congratulations!You know your matter and energy facts!

Matter & Energy Chapter 2 Review Begin. Which of the following is NOT an example of a physical property? Mass Shape Color Rust.

Documents

sublimation slide

liquid substance

wrong answer

good work

solid substance

melting point evaporation

mass shape color rust

meltingfreezing point