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35 Cards in this Set
- Front
- Back
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What is the Scientific Method and it's sequetial order?
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1.Ask a Question 2.Do reseach and get data 3.Form your hypothesis 4.Design an experiment ( Test one variable, test a manipulated variable, test your control, compare last two, test a responding or dependant variable) 5.Record data (Both quantitave and qualatative), and 6.Reach your conclusion and make your theory.
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What are the conditions to be called a "living thing"?
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You must: have cells, reproduce, be based on the universal genetic code, be able to grow and develop,be able to obtain and use mateials and energy, respond to your environment, can maintain inner balances ( homeostasis), change over time.
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What is homeostasis?
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The internal stimulus that keeps your body balance by makung you shiver to heat up or sweat to cool down.
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What does unicellular/multicellular mean?
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Being a one cell/ multi cell organism.(ex: unicellar=egg)
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What does stimulus mean?
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They are signals that your body reacts to; either internal or external.
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What are a few stimuluses?
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Homeostasis is an internal stimulus because your body reacts to it.An external example would be the Sun giving you light and heat.
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What are S.I. units?
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It stands for sesteme international, which is French for international system or the metric system.
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What does the mole measure?
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It measures chemicals.
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What does the candela measure?
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It measures light.
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What does the ampere measure?
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It measures electrical currents.
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What are the symbols for protons, neutrons, and electrons?
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The symbols are p+, n°, and e-.
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What are protons, neutrons, and electrons?
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They are subatomic particles that make up an atom.
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What do the subatomic particle symbols mean?
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+ means that it has a positive charge,° means that it is neutral, and - means that it's negative.
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What's an element?
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The standard amount atomic number and atomic mass as the substances most common form.
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What's an atomic number/mass??
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The atomic number is the number of protons in the nucleus. The atomic mass is how many protons + how many neutrons.
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What is an isotope?
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An element's atom that doesn't have the standard atomic mass.
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What is an ionic bond?
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a.When an electrons transfers to a new atom.
b.When electrons and protons attract. |
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What is an covalent bond?
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When two atoms share one electron.
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What is van der Waals forces?
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An intermolecular force of attraction that occurs because certain atoms and elements have different numbers of protons, therefore, they attract electons stay more on the stronger atom making it an uneven distribution of a negative charge. This can make a neutral atom, itself, positive or nagative, making the entire atom stick to others. This attraction is much weaker than ionic or covalent bonds.
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How many elements are on the periodic table?
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112.
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How many of the elements on the periodic table are natural and not man-made?
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92.
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What is a chemical compound?
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A substance made by two different elements, such as water.
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What's an ion?
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A positively or negatively charged atom, caused by the same occurance as van der Waals forces.
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What is a polar molecule, and what causes it to be made?
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A polar molecule is two atoms attracted by a covalent bond disributed unevenly so that the chemical compounds diffuse somewhat like oil in water making the protons on one end and the electrons on the other making two magnetic poles like Earth.
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What is an example of a polar molecule and what are the poles made of?
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H2O, or water is a polar molecule because Hydrogen has more protons making the covalent electron stay on the H side, and keeping Oxygen on the other side. this makes O the - side and H the + side.
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What are the atomic mass numbers of the subatomic particles?
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Protons = 1, neutons = 1, electrons = o (1/1840).
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What is a hydrogen bond?
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When entire molecules stick together because of polar molecules attracting to opposite poles.
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What is cohesion/adhesion?
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Cohesion is an attraction between two or more of the same chemical compounds. Adhesion is the same with two completely different compounds.
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What is a mixture?
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Two or more elements or compounds mixed physically, not chemically, to make a substance.
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What are the two types of mixtures made by water?
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They are solutions and suspensions.
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What is a solution/solute/solvent?
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A solution is a substance evenly spread throughout another substance, like salt in water. A solute is the substance that got dissolved. A solvent is what the solute dissolved into.
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What is a suspension?
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Substances that don't evenly dissolve, but, rather, split and seperate without fully settling into the solvent.
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What is the chemical equations that show how atoms turn into ions, and why are there two arrows pointed in both direction instead of an equal symbol?
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The equationis something like; H2O (right arrow over left arrow like equal sign)H+ + OH-. The arrows in both directions show that the equation can happen both ways in an atom.
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What is the chemical equations that show how atoms turn into ions, and why are there two arrows pointed in both direction instead of an equal symbol?
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The equationis something like; H2O (right arrow over left arrow like equal sign)H+ + OH-. The arrows in both directions show that the equation can happen both ways in an atom.
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What is the pH scale, and why was it made?
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A scale from 14-0, with 14 being the most basic, 0 being the most acidic substance, and 7 being neutral, or pure water. This tool was designed to measure the amount of positive hydrogen ions, 7 has an equal amount of H+ and OH-.
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