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Science > Chapter 21 > Flashcards

Chapter 21 Flashcards

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Biology 101 flashcards
1
Q

Anything that has made and occupies space.

A

Matter

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2
Q

Deals with how the natural world operates.

A

Basic research

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3
Q

Develops applications for basic research.

A

Applied research

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4
Q

The smallest unit of an element that can exist independently.

A

Atom

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5
Q

A group of atoms bonded together. H20- 1 oxygen atom, 2 hydrogen atoms.

A

Molecule

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6
Q

Atoms are arranged in a fixed position.

A

Solids

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7
Q

Atoms can move past each other.

A

Liquids

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8
Q

The study of matter and the transformations it can undergo.

A

Chemistry

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9
Q

Atoms can move freely in all directions.

A

Gases

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10
Q

Observable characteristics of a substance. (Color, texture, phase)

A

Physical properties

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11
Q

A substance changed its phase or properties but not its chemical composition.

A

Physical change

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12
Q

Describes how one substance interacts with another and created a new substance.

A

Chemical properties

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13
Q

Involves the rearrangement of a substance atoms creating a new substance with different properties.

A

Chemical change

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14
Q

The attraction between two or more atoms that holds them together in a molecule.

A

Chemical bond

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15
Q

The process In which atoms are rearranged to create a new substance.

A

Chemical reaction

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16
Q

Shows how many individual atoms are bound together in an elements pure form.

A

Elemental formula

17
Q

Created when atoms of different substances are bonded together to create a new substance. (Water, NaCl)

A

Compound

18
Q

A method used to show the number and types of atoms present in a substance. (Co2)

A

Chemical formula

19
Q

Shows the number of atoms in the chemical formula. (H20, 1 atom of o, 2 atoms of h)

A

Subscript number

20
Q

A summary of a chemical change.

A

Chemical equation

21
Q

Substance that exists before a chemical change. Located on the left of the chemical equation.

A

Reactants

22
Q

Substance that exists after the chemical change. Locating on the right of a chemical equation.

A

Products

23
Q

Matter is neither created nor destroyed during a chemical reaction.

A

Law of mass conservation

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