Chemical Changes Section 3 Flashcards

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1
Q

A property of matter that describes a substances ability to participate in chemical reactions

A

Chemical property

Examples:
Flammability
Reactivity

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2
Q

What indicates a chemical change?

A

Fizzing, bubbling, burning, changing color, flashing light, souring milk and odor

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3
Q

The capacity of a substance to combine chemically with another substance

A

Reactivity

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4
Q

A characteristic of a substance that does not involve a chemical change, such as density, color, or hardness

A

Physical property

Examples: solubility, density

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5
Q

The tendency of an object to resist being moved or, if the object is moving, to resist a change in speed or direction until an outside force acts on the object

A

Inertia

An object at rest remains at rest, an object in motion remains the in motion

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6
Q

A change that occurs when one or more substances change into entirely new substances with different properties

A

Chemical change

Examples:
Soured milk
Rusted metal
Mixed liquids

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7
Q

A change of matter from one form to another without change in chemical properties

A

Physical change

Examples:
Crushed can
Melted ice-pops
Cut down trees

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8
Q

A measure of the gravitational force exerted on an object; its value can change with the location of the object in the universe

A

Weight

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9
Q

A measure of the amount of matter in an object; a fundamental property of an object that is not affected by the forces that act on the object, such as the gravitational force

A

Mass

Units used to measure mass:
Grams
Kilograms
Newtons

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10
Q

The curve at a liquids surface by which one measures the volume of liquid

A

Meniscus

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11
Q

A measure of the size of a body or region in three dimensional space

A

Volume

Units used to measure volume:
Cubic centimeters
Cubic meters

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12
Q

Anything that has mass and takes place space

A

Matter

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13
Q

The ratio of the mass of a substance to the volume of the substance; commonly expressed as grams per cubic centimeter for solids and liquids grams per liter for gases

A

Density

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14
Q

How would you measure the density of a solid?

A

Put it in water and see if it floats (light density) or sinks (heavier density)

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15
Q

How would you measure the volume of an irregular solid?

A

First measure the bottom of the meniscus then drop the irregular object in the tube(the water will rise) now measure bottom of meniscus again. Minus the first measurement from the second measurement and multiply answer by 1 cubic centimeter

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16
Q

Describe concepts of liquid layers (dense vs least dense)

A

The densest layer is on the bottom. The least dense layer is on top. The order of layers shows the order of increasing density.

17
Q

Describe the concept of changes (physical vs. chemical)

A

Chemical change-happens when one or more substances are changed into new substances that new and different properties.

Physical change-is a change that affects one or more physical properties of a substance.