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Science Final
6th Grade Science Final 2022
| Natural Resource | Anything that occurs naturally in the environment that humans use |
| Nonrenewable Resource | A natural resource that cannot be replaced in a useful time frame |
| Fossil Fuels | Energy rich substances that are made from the preserved remains of organisms |
| Nuclear Fission | The splitting of an atom 's nucleus into two nuclei and releases a great deal of energy |
| Renewable Resource | A resource that we will not run out of and can be easily and quickly replaced |
| Renew | To replace something, re-establish, be able to repeat and action |
| Cost | The required price of the amount something has to be paid (in consequence) to obtain something |
| Ore | A mineral deposit that is large enough and valuable enough for it to be extracted from the ground |
| Crystallize | When a crystal structure is formed and forms a new mineral; this happens below water and underground in a solution |
| Distribution | To be spread out or passed out over an area |
| Desalination | The process that removes salt and minerals from saltwater to make freshwater |
| Component | A part or element of a larger whole |
| Obtain | To get, acquire or secure something |
| Birth Rate | The number of people born per 1,000 individuals for a certain period of time |
| Death Rate | The number of deaths per 1,000 individuals in a certain period of time |
| Exponential Growth | A rate of change that increases more and more rapidly over time |
| Pollution | Contamination of Earth's land, water, or air through the release of harmful substances into the environment |
| Overpopulation | A condition in which the number of humans grow beyond what the available resources can support |
| Conservation | The practice of using less of a resource so that it can last longer |
| Sustainable Use | The practice of allowing renewable resources time to recover and replenish |
| Estimate | To make an approximate calculation |
| Constraint | Limit or restriction |
| Point Source | A specific source of pollution that can be identified |
| Nonpoint Source | A widely spread source of pollution that is difficult to link to a specific point of origin |
| Emissions | Pollutants that are released into the air |
| Ozone | A from of oxygen that has three atoms in each molecule instead of the usual two; toxic to organisms where it forms near Earth's surface |
| Acid Rain | Rain or another form of precipitation that is more acidic than normal, caused by the release of molecules of sulfur dioxide and nitrogen oxide into the air |
| Primary | First in rank or importance |
| Deforestation | The removal of forests to use the land for other reasons |
| Erosion | The process by which water, ice, wind, or gravity moves weathered particles of rock and soil |
| Desertification | The advance of desert-like conditions into areas that previously were fertile;caused by over-farming, overgrazing, drought, and climate change |
| Sustainable | Using a resource in ways that maintain in a certain quality for a certain period of time |
| Resource | A source of aid or support that may be drawn upon when needed |
| Sewage | The water and human wastes that are washed down sinks, toilets, and showers |
| Sediment | Small, solid pieces of material that come from rocks or the remains of organisms: Earth material deposited by erosion |
| Thermal Pollution | A type of pollution caused by factories and power plants releasing super heated water into bodies of water |
| Climate | The long-term weather pattern in an area |
| Greenhouse Gases | Certain gases in the atmosphere (water vapor, carbon dioxide, methane, and nitrous oxide) absorb much of the heat leaving Earth's surface |
| Greenhouse Effect | The process by which greenhouse gases trap heat which keeps Earth warm |
| Climate Change | A sudden or gradual change in Earth's climate |
| Global Warming | Gradual increase in the global temperature |
| Impact | Affect influence or cause change in |
| Fossil Fuels | Substances formed from the remains of organisms; when these substances are burned, they release a lot of energy |
| Cascade Effect | An unforeseen chain of events cause by a disturbance in a system |
| Alternative Energy | Clean energy sources that do not come from fossil fuels |
| Argument | When scientists disagree about how to interpret data |
| Satellite (Moon) | A body that orbits a planet |
| Star | A giant ball of super heated gas or plasma, composed of hydrogen and helium |
| Planet | An object that orbits the sun, is large enough to have become rounded by its own gravity, and has cleared the area of its orbit of any debris |
| Meteor | A streak of light produced when a small piece of rock or ice, known as a meteoroid, burns up as it enters Earth's atmosphere |
| Comet | A cold mixture of dust and ice that develops a long trail of light as it approaches the sun |
| Constellation | A pattern or group of stars that people imagine represents a figure, animal, or object |
| Geocentric | Earth-centered model of the solar system where all the planets and stars circle Earth |
| Heliocentric | Sun-centered model of the solar system where all the planets and stars circle the sun |
| Ellipse | Oval Shape |
| Axis | Imaginary line that passes through a planet's center and its north and south poles, about which the planet rotates |
| Rotation | The spinning motion of a planet on its axis |
| Revolution | The movement of an object around another object |
| Orbit | The path of an object as it revolves around another object in space |
| Solstice | Either of the two days of the year on which the sun reaches its greatest distance north or south of the equator |
| Equinox | Either of the two days of the year on which neither hemisphere is tilted toward or away from the sun |
| Gravity | The attractive force between objects; the force that moves objects downhill |
| Law of Universal Gravitation | The scientific law that states that every object in the universe attracts every other object |
| Inertia | The tendency of an object to resist a change in motion |
| Hypothesize | To give a possible but not yet proven explanation for something |
| Phase | One of the different apparent shapes of the moon as seen from Earth |
| Umbra | The darkest part of a shadow |
| Penumbra | The part of a shadow surrounding the darkest part |
| Tide | The periodic rise and fall of the level water in the ocean |
| Spring Tide | The tide with the greatest difference between consecutive low and high tides |
| Neap Tide | The tide with the least difference between consecutive low and high tides |
| Significant | Having or likely to have influence or effect; a noticeably large amount |
| Solar System | The sun, the planets, their moons, and a variety of smaller objects |
| Astronomical Unit | The average distance measured from the center of the sun to the center of the Earth, which is about 150,000,000 km |
| Sun | A gaseous body much larger than anything else in the solar system |
| Planet | A round object that orbits the sun and has cleared out the region of the solar system along its orbit |
| Moon | A natural satellite or celestial body in orbit |
| Asteroids | Small, rocky bodies that orbits the sun and are found in the area between the orbits of Mars and Jupiter |
| Meteoroids | Chunks of rock or dust that are smaller than asteroids |
| Comets | Loose balls of ice and rocks that usually have very long, narrow orbits |
| Feature | A trait or characteristic |
| Electromagnetic Energy | Energy that can travel in the form of waves |
| Visible Light | The light you can see |
| Spectrum | The range of wavelengths of electromagnetic waves |
| Wavelength | The distance between the crest of one wave and the crest of the next wave |
| Telescope | Instruments that collect and focus light and other forms of electromagnetic radiation |
| Complement | To add information making a complete whole |
| Nebula | Large cloud of gas and dust containing an immense volume of material |
| Protostar | A contracting cloud of gas and dust with enough mass to form a star |
| White Dwarf | The blue-white hot core of a star that is left behind after its outer layers have expanded and drifted out into space |
| Supernova | The brilliant explosion of a dying supergiant star |
| Apparent Brightness | The brightness of a star seen from Earth |
| Absolute Brightness | The brightness of a star would have been if it were at a standard distance from Earth |
| Analyze | To study to examine something carefully so one can break it down to its components (parts) |
| Galaxy | A group of single stars, star systems, star clusters, dust, and gas bound together by gravity |
| Universe | |
| Light-year | The distance that light travels in one year |
| Big Bang | The theory that the universe formed in an instant, billions of years ago, in an enormous explosion |
| Determine | Find out, learn, or determine with certainty, usually by making an inquiry or other effort |
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