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Biology Fall Semester Exam EOC Terrms
EOC terms
21
Biology
9th Grade
11/13/2013

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Term

Mass Number

Definition

Equal to the number of protons plus number of neutrons found in the nucleus.

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Term

Proton, Neutron, Electrons

Definition

Subatomic particles than make up an atom.

  • Protons are positively charged and located in the nucleus. The number of protons = Atomic Number.
  • Neutrons have no charge and are located in the nucleus.
  • Electons are negatively charged and are located in the electron cloud which encircles the nucleus. 
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Term

Cohesion

Definition

Attraction between molecules of the same substance. Explanation why drops of water form beads on a smooth surface.

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Term

Adhesion

Definition

Attraction between molecules of different substances. Explains why a meniscus forms when water is in a graduated cylinder.

 

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Term

Organic

Definition

Contains Carbon. There are four groups found in living things: carbohydrates, lipids, nucleic acids, and proteins.

 


Term

Active site of Enzyme

Definition

Part that fits into the substrate. If destroyed, the enzyme will not work.

 

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Term

Contractile vacuole of Paramecium

Definition

Pumps excess water out of an organism to maintain homeostasis.

 

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Term

Mean value

Definition

Average of a set of values

Term

Scientific Research

Definition

Uses the scientific method to find answers to questions.

Term

Positive correlation

Definition

A relationship between two variables such that their values increase or decrease together. 

 

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Term

Negative Correlation

Definition

A relationship between two variables in which one variable increases as the other decreases, and vice versa. 

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Term

Joseph Priestly

Definition

English minister that experimented to see if something in the air was necessary to keep a candle burning. He found that it was oxygen, which is released during photosynthesis. 

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Term

Jan van Helmont

Definition

Experimented to find out if ploants grew by taking materials out of the soil. He concluded that most of the mass gained by the tree had come form water, since water was the only thing he added to the pot of soil.

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Term

Activiation Energy

Definition

Energy that is needed to get a reaction started.

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Term

Mammal

Definition

Have hair or fur; four-chambered heart; use lungs for respiration; get milk from mother.

 

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Term

Catalyst

Definition

Substance that speeds up the reate of a chemical reaction. Work by lowering a reaction's activation energy.

 

 

Term

Phagocytosis

Definition

 Engulfing of solid particles or when large particles are taken into the cell by endocytosis.

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Term

Dichotomous Key

Definition

A tool that allows the user to determine the identity of items in the natural world.

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Term

Grana

Definition

A stack of thylakoids

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Term

Inoculate

Definition

 To implant (a disease agent or antigen) in a person, animal, or plant to produce a disease for study or to stimulate disease resistance.

Term

Incubate

Definition

To keep something in proper conditions for development.

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