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What term describes the sequence showing how energy and nutrients pass from one organism to another as one organism is eaten by the next?

ANitrogen fixation

BFood chain

COsmosis

DWater cycle

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What term describes a community of living organisms interacting with each other and with their surrounding physical environment?

ASpecies

BPopulation

CEcosystem

DHabitat only

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What is the process called by which species gradually change over successive generations, with traits better suited to survival becoming more common over time?

AEvolution through natural selection

BFermentation

CPhotosynthesis

DHomeostasis

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Antioxidants, found naturally in many foods and sometimes added as preservatives, help protect against which type of chemical process?

AFermentation

BExcessive hydration

COxidation

DCrystallization

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What term describes the visible bubbling or fizzing that occurs when a gas is released from a liquid, such as when an antacid tablet dissolves in water?

ASublimation

BPrecipitation

CDistillation

DEffervescence

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What term describes the chemical spoilage process in which fats and oils develop an unpleasant smell and taste due to oxidation over time?

ASublimation

BRancidity

CFermentation

DSaponification

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Fluoride is commonly added to toothpaste and some water supplies primarily for what health benefit?

ATo whiten teeth instantly

BTo reduce blood pressure

CTo help prevent tooth decay by strengthening tooth enamel

DTo improve digestion

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Halogens, a reactive group of non-metal elements including chlorine, fluorine, and iodine, are found in which part of the periodic table?

AThe group second from the right

BThe very top row only

CThe leftmost group

DThe middle transition metal block

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Alkali metals, found in the first group of the periodic table, are generally known for what characteristic?

AExisting only as gases at room temperature

BBeing highly reactive, especially with water

CBeing extremely unreactive and stable

DBeing commonly used as insulators

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What term describes the natural process by which certain bacteria convert atmospheric nitrogen gas into compounds that plants can absorb and use?

ANitrogen fixation

BPhotosynthesis

CFermentation

DRespiration

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