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Biology Vocab 1

first list of biology vocab words

QuestionAnswer
Biology Study of life
Cell Smallest unit of life
Atom Smallest functional unit of matter that have all properties of the element
Homeostasis Property of a system that regulates the internal environment
Metabolism Chemical reactions that occur inside of an organism that allow life to be sustained
Cell Respiration Cells break down organic molecules (sugars) to make high energy compounds (like ATP)
Photosynthesis When organisms use light to make food
Autotrophs Make their own food
Heterotrophs Need to eat other organisms to get food
Evolution Populations of organisms, over time, change from generation to generation to become better adapted to the environment
Eubacteria True bacteria
Cyanobacteria Photosynthetic bacteria (Blue green algae)
Archaebacteria Unicellular prokaryotes who live in extreme environments
Eukaryotes More complex cells, have true nucleus
Binomial nomenclature 2 part scientific name in Latin, genus and species
Hypothesis Proposed explanation of natural phenomenon, based on observation or scientific knowledge, should make predictions that are testable
Theory Broad explanation of some aspect of the natural world supported by large body of evidence
Discovery-based science Collect and analyze data without preconceived notions
Controlled experiment Has two groups (Control and experimental), two groups analyzed to see if groups are significantly different from one another
Element Pure substance of one kind of atom
Electrons Negatively charged, arranged in orbitals around nucleus
Protons Positively charged, in nucleus
Neutrons Neutral charge, in nucleus
Atomic mass Based on number of protons and neutrons
Electronegativity Ability of an atom to attract/gain electrons
Ion Charged form of atom
Molecule 2 or more atoms
Compound Molecule made of 2 or more atoms with atoms of different elements
Ionic Bond Bond formed between positively and negatively charged ion
Covalent Bond Electrons shared between atoms
Nonpolar Bond A type of bond that has no positive or negative ends
Polar Molecules Have a partial positive or partial negative charge at one end of the molecule
Single Covalent Bond One pair of electrons between atoms
Double Covalent Bond Two pairs of electrons between atoms
Disulfide Bond Single bond between 2 sulfur bonds
Hydrogen Bond Forms when an H atom is electrically attracted to an electronegative atom
Created by: cekazmer
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