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1st Qrt Sci Terms

7th grade science terms

Continental drift Wegener's hypothesis that all continents were once connected in a single large landmass that broke apart about 200 million years ago and drifted slowly to their current positions
Mantle Thin layer of tissue that covers a mollusk's body and that can secrete a shell
Density Measurable physical property that can be found by dividing the mass of an object by its volume
Asthenosphere Plasticlike layer of Earth which the lithospheric plates float and move around
Oceanic Crust The thin crust under the oceans is thinner and denser than continental crust
Mass The amount of matter in a given object
Volume The amount of space an object takes up
Matter Anything that has mass and takes up space and is made up of different kinds of atoms; includes all things that can be seen, tasted, smelled, or touched but does not include heat, sound, or lgiht
Plate Tectonics Theory that Earth's crust and upper mantle are broken into plates that float and move around on a plasticlike layer of the mantle
Equator Imaginary line that wraps around Earth at 0 latitude, halfway between the north and south poles
Prime Meridian Imaginary line that represents 0 longitude and runs from the north pole through Greenwich, England, to the north pole
Latitude Distance in degree north or south of the equator
Longitude Distance in degrees east or west of the prime meridian
Convection Current Current in Earth's mantle that transfers heat in Earth's interior and is the driving force of plate tectonics
Seafloor Spreading Hess's theory that new seafloor is formed when magma is forced upward toward the surface at a mid-ocean rigde
Scientific methods problem-solving procedures that can include identifying the problem or question, gathering information, developing a hypothesis, testing the hypothesis,analyzing the results, and drawing conclusion
Pangaea Large, ancient landmass that was composed of all the continets join together
Scientific Theory Explanation that is supported by results from repeated experimentation or testing
Earthquake Movement of the ground that occurs when rocks inside Earth pass their elastic, limit, break suddenly, and experience elastic rebound.
Created by: SinyeeCheung703