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Biology Vocabulary > Unit 1: The Nature Of Life > Flashcards

Unit 1: The Nature Of Life Flashcards

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1
Q

Acid

A

Is between 0 and 7 on the pH scale

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2
Q

Adaptation

A

A characteristic that helps a living thing survive and reproduce in a given environment

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3
Q

Adhesion

A

Attraction to water to other molecules

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4
Q

Anion

A

A negatively charged ion

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5
Q

Atom

A

The smallest unit of a chemical element

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6
Q

Atomic mass

A

Number of proteins plus neurons

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7
Q

Base

A

Between 7 and 14 on the pH scale

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8
Q

Biodiversity

A

Diversity of living things

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9
Q

Biology

A

The study of living things

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10
Q

Biome

A

A group of similar ecosystems with the same general type of physical environment

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11
Q

Biosphere

A

Part of earth where all life exists including land, air, and water

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12
Q

Buffer

A

Weak acids and weak bases which work to neutralize substances inside cells that are too acidic to too basic

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13
Q

Cation

A

A positively charged ion

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14
Q

Cell

A

The basic unit of the structure and function of living things

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15
Q

Cell theory

A

All living things are made up of cells; cells are the structural unit of living organisms; living cells come from other living cells

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16
Q

Chemistry

A

The study of matter, it’s composition, and properties

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17
Q

Chromosome

A

Location of genes, made up of DNA

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18
Q

Cohesion

A

Attraction of water to other water molecules (surface tension allowing insects to walk on water)

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19
Q

Covalent bond

A

The force of attraction that holds together two non metal atoms that share a pair of electrons

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20
Q

Crystal

A

A rigid framework of many ions locked together in a repeating pattern

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21
Q

DNA

A

Large molecules encoded with instructions that tell cells what to do

22
Q

Density

A

Frozen water is less dense than liquid which allows it to float on water (insulates bodies of water allowing living things to survive during cold temperatures)

23
Q

Dependent variable

A

The affected variable depends on the independent variable and scientists cannot control the dependent variable

24
Q

Ecosystem

A

Consists of all living things in a given area, together with the non living things

25
Q

Electron

A

Negatively charged particles in an atom, they participate in bonding

26
Q

Element

A

A pure substance

27
Q

Gene

A

A segment of DNA that has the instructions to encode a protein; located in larger structures called chromosomes

28
Q

Gene theory

A

The idea that all characteristics of living organisms are controlled by genes

29
Q

Homogeneous

A

The same chemical composition found uniformly throughout the substance

30
Q

Homeostasis

A

The process of maintaining a constant internal environment

31
Q

Hydrogen bond

A

The positive hydrogen end of one water molecule is attracted to the negative oxygen end of the nearby water molecule. Because of this attraction, weak bonds form between the adjacent molecules

32
Q

Hydrogen ion

A

H + ion created from the breakdown of water

33
Q

Hydroxide ion

A

OH - ion created from the breakdown of water

34
Q

Independent variable

A

The variable that is changed in an experiment

35
Q

Ion

A

When an atom gains or loses electrons

36
Q

Ionic bond

A

The force of attraction that hold together oppositely charged ions

37
Q

Isotope

A

Atoms of an element with differing numbers of neutrons

38
Q

Molecule

A

Atoms held together by covalent bonds

39
Q

Matter

A

Anything that has mass and takes up space

40
Q

Organ

A

Structure composed of one or more types of tissue

41
Q

Organ system

A

A group of organs that work together to do a certain job

42
Q

Outlier

A

When data falls outside the pattern observed

43
Q

pH scale

A

A scale to measure the concentration of hydrogen ions and hydroxide ions that exist in solutions. The scale ranges from 0 to 14

44
Q

Polar covalent bond

A

Bond in a polar molecule in which electrons are shared between the molecules

45
Q

Polar molecule

A

A molecule in which part of the molecule is positively charged and part of the molecule is negatively charged

46
Q

Polarity

A

The property of a molecule to have a positive and negative end

47
Q

Proton

A

Positively charged particles in an atom, located in the nucleus

48
Q

Qualitative data

A

Observations recorded as descriptions

49
Q

Quantitative data

A

Information about quantities

50
Q

Tissue

A

A group of cells of the same kind

51
Q

Trend

A

Show scientists a pattern in the data

52
Q

Valence electron

A

Electrons found in the outer energy level of an atom

Biology Vocabulary (11 decks)

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