Organisms and Environments
The variety of living organisms in an area is called .....
Biodiversity
Plate boundaries formed from the collision of two tectonic plates:
convergent boundary
A cloud of dust and gas that results from the death of a star and where new stars are formed
Nebula
Distance divided by time equals
Speed
Smallest unit of an element that retains the element's distinct properties
Atom
The process that plants perform involving the harnessing of sunlight, water, and carbon dioxide to make energy and oxygen.
Photosynthesis
Front that brings decreasing temperatures, sometimes severe weather, but often clouds, rain, storms, and clears quickly
Cold front
The moon phase that begins the lunar cycle; results when the moon is positioned between the Sun and the Earth.
New Moon
Speed with direction (north, south, east, west)
Velocity
Change that results in the creation of new substances; can be indicated by temperature, light, color change, gas formation, or precipitate formation.
Chemical change
Nonliving factors in an ecosystem, such as water, sunlight, temperature, and soil.
Abiotic
The amount of time it takes Earth to complete one revolution around the Sun
1 year; 365.25 days
These are the result of the Earth's tilt and revolution around the Sun, and are accompanied by changes in weather and temperature; happen four times a year.
Seasons
Law of Motion that states that for every action, there is an equal and opposite reaction
Newton's 3rd Law
Electrons found in the outermost shell of an atom that influence the atom's chemical behavior (i.e. its reactivity)
Valence Electrons
The percentage of energy that is transferred between trophic levels in an ecosystem.
10 percent
The layer of the Earth comprising the crust and the upper mantle that makes up the tectonic plates
Lithosphere
The largest group of stars on the Hertzsprung Russell Diagram; the category that includes the Sun and other stars of similar size
Main Sequence
Forces that cause objects to accelerate (start, stop, speed up, slow down, or change direction)
Unbalanced force
Law that states that matter is neither created nor destroyed in a chemical reaction
Law of Conservation
The final stage of either primary or secondary succession.
Climax Community
Heat transfer process where warmer material expands and rises and is replaced by cooler material that condenses and sinks; results from the uneven heating of Earth by the Sun and affects global weather patterns
Convection currents
Gamma Rays
Newton's 2nd law Equation
F=ma; Force equals mass times acceleration
A change that does not result in the creation of a new substance
Physical change