ATI TEAS 7 Science Flashcard Set
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Qualitative Data
Terms in this set (49)
Quantitative Data
Information that can be measured and written down with numbers.
Qualitative Data
Information that describes qualities or characteristics.
Constants
The variables that the scientist wants to remain the same throughout the experiment.
Dependent Variable
The variable being tested and measured in a scientific experiment.
Independent Variable
The variable that is changed or controlled in a scientific experiment.
Control Group
The group in an experiment or study that does not receive treatment and is used as a benchmark.
Law (Scientific)
A statement based on repeated experimental observations that describes some aspect of the world.
Theory
A well-substantiated explanation of some aspect of the natural world that is acquired through the scientific method.
Hypothesis
A proposed explanation for a phenomenon.
Passive Transport
The movement of ions and other atomic or molecular substances across cell membranes without need of energy input.
Active Transport
The movement of molecules across a cell membrane in the direction against their concentration gradient.
Osmosis
The movement of water molecules through a selectively permeable membrane.
Diffusion
The spreading of something more widely.
Cell Wall
A rigid layer lying outside the plasma membrane of the cells of plants, fungi, and bacteria.
Cell Membrane
The semipermeable membrane surrounding the cytoplasm of a cell.
Cytoplasm
The material within a living cell, excluding the nucleus.
Chloroplast
An organelle found in plant cells where photosynthesis occurs.
Lysosome
An organelle containing digestive enzymes that break down waste materials and cellular debris.
Golgi Apparatus
An organelle involved in the modification, sorting, and packaging of proteins for secretion.
Endoplasmic Reticulum
An organelle that forms an interconnected network of flattened, membrane-enclosed sacs or tubes known as cisternae.
Mitochondria
Organelles known as the powerhouses of the cell, generating most of the cell's supply of ATP.
Ribosome
A complex molecular machine found within all living cells that produces proteins.
Nucleus
A membrane-bound organelle that contains the cell's chromosomes.
Biome
A large naturally occurring community of flora and fauna occupying a major habitat.
Ecology
The branch of biology that deals with the relations of organisms to one another and to their physical surroundings.
Adaptation
A trait that helps an organism survive and reproduce.
Genetic Mutation
A permanent alteration in the DNA sequence that makes up a gene.
Natural Selection
The process where organisms better adapted to their environment tend to survive and produce more offspring.
Evolution
The process by which different kinds of living organisms are thought to have developed from earlier forms.
Biodiversity
The variety of life in the world or in a particular habitat or ecosystem.
Ecosystem
A biological community of interacting organisms and their physical environment.
Cellular Respiration
The process of breaking down glucose to obtain energy in the form of ATP.
Photosynthesis
The process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water.
Meiosis
A type of cell division that results in four daughter cells each with half the number of chromosomes of the parent cell.
Mitosis
A type of cell division that results in two daughter cells with the same number and kind of chromosomes as the parent nucleus.
Chromosome
A structure of nucleic acids and protein found in the nucleus of most living cells, carrying genetic information.
Gene
A unit of heredity that is transferred from a parent to offspring.
DNA
The carrier of genetic information in living organisms.
Enzyme
A substance produced by a living organism that acts as a catalyst to bring about a specific biochemical reaction.
Metabolism
The chemical processes that occur within a living organism to maintain life.
Homeostasis
The tendency of the body to maintain a stable internal environment.
Organ System
A group of organs that work together to perform one or more functions.
Organ
A part of an organism that is typically self-contained and has a specific vital function.
Tissue
A group of cells that perform a similar function.
Cell
The smallest structural and functional unit of an organism.
Compound
A substance formed from two or more elements chemically united in fixed proportions.
Element
A substance that cannot be broken down into simpler substances by chemical means.
Molecule
A group of atoms bonded together.
Atom
The basic unit of a chemical element.
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