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Q 1/117
Score 0
An organized way of gathering and analyzing evidence about the natural world
30
Science
Q 2/117
Score 0
A process of noticing and describing events or processes in a careful, orderly way
30
Observation
117 questions
Q.
An organized way of gathering and analyzing evidence about the natural world
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A process of noticing and describing events or processes in a careful, orderly way
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A possible explanation for a set of observations or a possible answer to a scientific question
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An experiment in which only one variable is changed
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The group in an experiment that is exposed to the same conditions as the experimental group except for one independent variable
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Evidence; information gathered from observations
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A well-tested explanation that unifies a broad range of observations and hypotheses, and enables scientists to make accurate predictions about new situations
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A particular preference or point of view that is personal, rather than scientific
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The scientific study of life
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The genetic material that organisms inherit from their parents
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A signal to which an organism responds
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The relatively constant internal physical and chemical conditions that organisms maintain
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The combination of chemical reactions through which an organism builds up or breaks down materials
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The part of Earth in which life exists, including land, water, and air or atmosphere
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The basic unit of matter
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The center of an atom, which contains the protons and neutrons
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A negatively charged particle; located in the space surrounding the nucleus
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A pure substance that consists of one type of atom
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One of several forms of a single element, each of which contains the same number of protons but different numbers of neutrons
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A substance formed by the chemical combination of two or more elements in definite proportions
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A chemical bond formed when one or more electrons are transferred from one atom to another
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A type of bond between atoms in which the electrons are shared
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The smallest unit of most compounds that displays all the properties of that compound
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The attraction between molecules of the same substance
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The force of attraction between different kinds of molecules
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A type of mixture in which all the components are evenly distributed
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A mixture of water and nondissolved material
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A compound that releases hydrogen ions (H+) in solution; a solution with a pH of less than 7
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A compound that releases hydroxide ions (OH-) in solution; a solution with pH of more than 7
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A compound that prevents sharp, sudden changes in pH
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A compound made up of carbon, hydrogen, and oxygen atoms; a type of nutrient that is the main source of energy for the body
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A macromolecule made mostly from carbon and hydrogen atoms; includes fats, oils, and waxes
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A macromolecule containing hydrogen, oxygen, nitrogen, carbon, and phosphorus
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A macromolecule that contains carbon, hydrogen, oxygen, and nitrogen; needed by the body for growth and repair
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The monomer for proteins
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The monomer for carbohdyrates
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The monomer for nucleic acids
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The process that changes, or transforms, one set of chemicals into another set of chemicals
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The energy that is needed to get a reaction started
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A substance that speeds up the rate of a chemical reaction
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A protein catalyst that speeds up the rate of specific biological reactions
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The study of how organisms interact with each other and with their environment
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Any living part of the environment
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Group of individuals that belong to the same species and live in the same area
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An assemblage of different populations that live together in a defined area
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All the organisms that live in a place, together with their physical environment
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A group of ecosystems that share similar climates and typical organisms
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A physical, or nonliving, factor that shapes an ecosystem
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Used to test hypotheses
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Used to help understand events that are difficult to study directly; often based on data collected through observation and experimentation
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An organism that is able to capture energy from sunlight or chemicals and use it to produce its own food from inorganic compounds; also called a producer
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First to produce energy-rich compounds that are later used by other organisms
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An organism that obtains food by consuming other living things; also called a consumer
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An organism that relies on other organisms for its energy and food supply; also called a heterotroph
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Kill and eat other animals
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Obtain energy and nutrients by eating plant leaves, roots, seeds, or fruits
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Eat both plants and animals
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Chew or grind detritus particles into smaller pieces
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Feed by chemically breaking down organic matter
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Consume the carcasses of other animals that have been killed by predators or have died of other causes
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A series of steps in an ecosystem in which organisms transfer energy by eating and being eaten
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A network of complex interactions formed by the feeding relationships among the various organisms in an ecosystem.
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Each step in a food chain or food web
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An illustration of the relative amounts of energy or matter contained within each trophic level in a given food chain or food web
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The total amount of living tissue within a given trophic level
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A process in which elements, chemical compounds, and other forms of matter are passed from one organism to another and from one part of the biosphere to another
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The process of converting nitrogen gas into nitrogen compounds that plants can absorb and use
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The process by which soil bacteria convert nitrates into nitrogen gas
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Day-to-day condition of the Earth's atmosphere
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Occurs when organisms attempt to use the same limited resources
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Average conditions over long periods of time; year-to-year patterns of temperature and precipitation
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Environmental conditions that vary over small distances, for example: south side of a tree or building
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When carbon dioxide, methane, and water vapor allow visible light into the atmosphere, but trap heat energy
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The horizontal lines used to mark regions of the Earth, like a ladder
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Located between 23.5 degrees S and 23.5 degrees N and receives nearly direct sunlight all year
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Located between 23.5 degrees and 66.5 degrees North/South. Receives less direct sunlight and varying amounts of sunlight throughout the year.
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Located North of 66.5 degrees N and south of 66.5 degrees S. Receives very indirect sunlight and experiences darkness certain times of the year.
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Movement of warm and cool water caused by unequal heating of the Earth's surface at different latitudes.
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Unequal heating and cooling of Earth's atmosphere causing movement of air masses
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The ability to survive and reproduce under a range of environmental circumstances
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The general place where an organism lives
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Describes what an organism does and how it interacts with biotic and abiotic factors in its environment
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Any necessity of life- water, nutrients, light, food, or space
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Competition between individuals of the same species
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Competition between individuals of different species
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No two species can occupy exactly the same niche in exactly the same habitat at exactly the same time
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The interaction when one animal captures, kills, and eats another animal
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The interaction in which an herbivore feeds on producers
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A single species that is vital to ecosystem stability
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Relationship when two species live closely together
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Relationship when both species benefit
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Relationship when one species benefits and the other is harmed
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Relationship when one species benefits and the other species is neither harmed nor benefited
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More or less predictable step-by-step process in a community following a disturbance
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Occurs in an area in which no trace of a previous community is present
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First species to populate an area during succession
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Occurs in an area that was only partially destroyed by disturbances
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a dense covering formed by the leafy tops of tall rain forest trees
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the layer in a rain forest found underneath the canopy formed by shorter trees and vines
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material formed from decaying leaves and other organic matter
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a biome with long cold winters and a few months of warm weather; dominated by coniferous evergreens; also called boreal forest
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a layer of permanently frozen subsoil found in the tundra
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organisms that live attached to or near the bottom of lakes, streams, or oceans
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typically small organisms that drift in, and may swim through, aquatic environments; includes both phytoplankton and zooplankton
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an ecosystem in which water either covers the soil or is present at or near the surface for at least part of the year
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a kind of wetland formed where a river meets the ocean
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the numbers of males and females in different age groups of a population
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the movement of individuals into an area occupied by an existing population
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the movement of individuals out of an area
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a growth pattern in which the individuals in a population reproduce at a constant rate
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a growth pattern in which a population's growth rate slows or stops, following a period of exponential growth
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the largest number of individuals of a population that a given environment can support
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a factor that causes the growth of a population to decrease
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a limiting factor that depends on population size
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a limiting factor that affects all populations in similar ways, regardless of population size
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the scientific study of human populations
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a change in a population from high birthrates and death rates to low birthrates and death rates