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52 Cards in this Set

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SCIENTIFIC METHOD
Organized, logical approaches to scientific research.
ECOSYSTEM
Community of organisms and the environment they inhabit.
BIODEGRADABLE
Able to be broken down into component parts by microorganisms.
ERATOSTHENES
Greek mathematician whoused careful observations and simple geometry to determine the circumference of Earth (distance around the Earth)
VARIABLE
A factor in an experiment that can be changed.
BIG BANG THEORY
Theory that allmatter and energy in the universe was compressed into an extremely small volume that suddenly, billions of years ago, began expanding in all directions.
ECOLOGIST
One who studies the complex relationships between living things and their environment.
GEOLOGIST
One who studies the origin, history and structure of the solid earth and the processes that shape it.
METEOROLOGIST
One who studies the earth's atmosphere.
ASTRONOMER
One who studies the universe beyond the earth.
OCEANOGRAPHER
One who studies the earth's oceans.
METEORITE-IMPACT
Meteor or part of a meteor left after it hits the earth's surface.
HYPOTHESIS
Possible explanation of a problem that is based on facts.
IRIDIUM
A substance that is uncommon in earth rocks, but common in meteorites.
LIGHT WAVES
Light travels in waves. The distance from the crest of one wave to the crest of the next is a wavelength. Each color in the spectrum has a different wave length. Red is longest and violet is shortest. As light passes through prism, each wave length is bent at a different angle and the band of colors results.
ASTHENOSPHERE
Zone of mantle beneath the lithosphere that consists of slowly flowing solid rock.
LITHOSPHERE
Thin outer shell of the earth consisting of the crust and the rigid upper mantle.
GEOSPHERE
The solid earth.
P WAVES
One of two types of seismic waves. P waves travel through liquids, solids, and gases.P waves travel faster. The speed and direction is affected by the composition of the material through which it travels.
S WAVES
One of two types of seismic waves. S waves travel only through solids.
LAW OF GRAVITATION
Principle that the force of attraction between two objects depends on the masses and distance between the objects.
PERIGEE
Point in the orbit of a satellite at which it is closest to the earth.
APOGEE
Point in the orbit of a satellite at which the satellite is farthest from the earth.
PERIHELION
Point in the orbit of a planet at which it is closest to the sun.
MOHO
The Mohorovicic discontinuity, boundary between the earth's crust and mantle.
MASS OF OBJECT
The amount of matter in an object.
POLAR ORBIT
Orbit that passes over the earth's North and South poles.
GEOSYNCHRONOUS ORBIT
A satellite in orbit always remains at the same point above the equator and appears to be stationary in the sky.
GREAT CIRCLE
Any circle that divides the globe in half.
LONGITUDE
Angular distance east or west of the prime meridian.
LATITUDE
Angular distance north or south of the equator.
PRIME MERIDIAN
The Meridian that passes through Greenwich,England, designated as O
ATOMS
Smallest unit of an element.
IONIC
ionic bond: bond in which electrons are transferred from one atom to another. ionic compound: compound formed through the transfer of electrons.
COVALENT
covalent bond: bond based on the attraction between atoms that share electrons. convalent compound: compound formed from atoms that share electrons.
NUCLEUS
Region in the center of an atom that contains the protons and neutrons.
ELECTRONS
Subatomic particle with a negative electrical charge.
PROTONS
Subatomic particle with a positive electrical charge.
NEUTRONS
Subatomic particle with no electrical charge.
BACKGROUND RADIATION
Lowlevels of energy evenly distributed throughout the universe.
RED SHIFT
Apparent lengthening of the light waves emitted by a star moving away from the earth.
SALINITY
The total amount of dissolved salts in the ocean water.
PLANKTON
The group of organisms, generally microscopic, that float or drift near the ocean surface.
PHYTOPLANKTON
The group, usually microscopic
plantlike protists that live near the surface of the ocean with the ocean currents.
ZOOPLANKTON
The group of tiny animals, usually microscopic, that float or drift near the ocean surface.
SEDIMENT
Bits of weathered rocks and minerals and pieces of dead plants or animals.
INVERTEBRATES
Animals with no backbones.
PHOTOSYNTHESIS
The process by which green plants and other producers use light energy to make food.
NEKTON
All the free swimming animals that live in the ocean. The nekton group includes such active animals as fish, octopuses, and whales.
BENTHOS
All the plants and animals that live on the ocean bottom. The benthos group includes oysters, crabs and coral.
CHLOROPHYLL
Chloroplasts contain a green chemical called chlorophyll that is able to capture or absorb the light energy in sunlight.
RESPIRATION
The process of using oxygen to release stored energy by breaking down sugar molecules.