SCIENCE FINAL!!
About this set
Created by:
magster222 on May 25, 2011
Description:
I only put the hardest questions in, obviously it's not all of them. It's a mixture from the 6 main study guides.
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98 terms
Terms | Definitions |
|---|---|
 physical science | study of matter and energy |
| a hypothesis must be | testable and supported by evidence |
| a hypothesis is developed out of | experiments and observations |
| physical science is divided into | physics and chemistry |
| what doesn't involve physical science | social interactions between animals |
| biology | uses physical science to explain how the heart pumps blood, how our eyes and ears work ect. |
| if you can't use a controlled experiment you should.... | build a model so you can control the factors |
| controlled experiment | involves a control group, experimental group, and a variable |
| to study the side effects of a medicine you should... | include a control group that doesn't get medicine |
| g/cm3 | SI unit for density |
| oil is | less dense than water |
| steel has a | density that is less than water |
| millimeters | the measurement used to describe a grain of rice |
| ice is | less dense than water |
| milli- | a prefix meanning 1/1,000 |
| 37 degrees celcius | the normal body temperature |
| density... | depends on mass and volulme |
| inertia | increases as mass increases |
| volume of a liquid is measured... | at the lowest part of the meniscus |
| meters cubed | what the volume of a solid is expressed in |
| gravity | effects an object's weight |
| newton | the SI unit of force |
| weight is... | dependent on where the object is in relation to earth, also depends on the mass of the object and the mass of earth |
| density is the same at | a given pressure and temperature |
| a favorable chemical property of irn is.. | nonreactivity with oil and gasoline |
| to distinguish between wax and plastic you could | burn them separately |
| chemical changes | can be undone by other chemical changes |
| newton | the weight of a large apple |
| titanium | has low mass per unit volume |
| kilogram | SI unit for matter |
| dissolving salt in water demonstates | solubility and a physical change |
| boiling and freezing points are | examples of physical properties |
| condensation | a change of state where atoms become more ordered |
| the volume of gas in a piston decreases when | the temperature doesn't change but the pressure is reduced |
| the particles of water that evaporate from an pen container have... | more speed and higher energy than the particles that remain |
| fulgurite | an amorphous solid formed when lightning strikes silica |
| plasma | a form of matter where the particles are broken apart |
| if a pressure cooker contains steam at high pressure then.. | the particles of gas are close together and collide with the inside of the container at a fast rate |
| Boyle's Law | states that for a fixed amount of gas at a constant temperature, the volume increases as the pressure increases |
| Charle's law | states that for a fixed amount of gas at a constant pressure, volume increases as temperature increases |
| freezing | occurs at same temperature as melting |
| irn has a | higher freezing point than water |
| boiling | vaporization that occurs throughout a liquid |
| atmospheric pressure is... | lower at the top of the mountain, lowering the boiling point of the water |
| condensation point | the same temperature as the boiling point at a given pressure and the temperature at which gas changes to a liquid |
| solid carbon dioxide | is most likely to undergo sublimation |
| steam condenses into liquid water | at 100 degrees celcius at sea level |
| amorphous solid | has particles that are not in an orderly arrangement |
| to boil water at a temperature lower than 100 celcius you must.... | decrease the pressure |
| fog forms when | the air temperature drops |
| vaporization | a change of state used to cool football players down |
| to increase the solubility of gas in a liquid you should... | decrease the temperature |
| a substance that can only be separated by chemical means is | water (electrolosis) |
| metal | an element that conducts thermal energy well and is easily shaped |
| the particles in both a suspension and a colloid can | scatter light |
| distillation | a process that can be used to separate crude oil from its components |
| nonmetals are | unmallable |
| gold is.... | not a compound |
| nitrogen | an element needed to make proteins in nature |
| air is a | mixture |
| brass is not a.... | suspension |
| blood is a... | suspension |
| a suspension is a | heterogeneous mixture |
| the elements gold, copper, sulfur, neon, and carbon | do not react readily with water or air and can be found uncombined in nature. |
| metalloids | can become good conductors when mixed with other elements |
| a colloid | can be made from solids, liquids, and gases |
| a suspension can be... | a medicine that instructs you to shake the bottle well before using |
| steel is a.... | mixture, alloy, and solution |
| examples of metalloids are... | silicon, boron, and antimony |
| examples of colloids are... | fog, milk, and mayonnaise |
| gravity | based on mass of objects and distance between them |
| electron | the least massive particle of an atom |
| the size of atoms... | varies widely |
| mass number | the sum of protons and neutrons |
| atomic number | the number of protons |
| atomic mass | a weighted average of all the naturally occurring isotopes |
| ion | has unequal amount of protons and electrons |
| isotope | has unequal amounts of protons and neutrons |
| electromagnetic force | holds the electrons around the nucleus, causes protons in the nucleus to push away from each other |
| halogens | a group of highly reactive gases |
| alkaline-earth metals | have greater density than alkali metals |
| silicon | a metalloid |
| most metals... | are made up of atoms with few electrons in their outer energy level |
| the elements in groups 3-12 | are solids at room temperature, except for mercury |
| Mosely determined the number of _ in an atom | protons |
| the elements in a period become... | less metallic from left to right |
| period | a row of elements on the periodic table |
| group | a column of elements on the periodic table |
| lithium | a very reactive metal |
| nonmetals | have an almost complete set of electrons in their outer energy level |
| metalloids | have a half-complete set of electrons in their outer energy level |
| air | mainly composed of elements that are nonmetals |
| alkali metals | soft enough to be cut with a knife |
| Hydrogen | has physical properties more like the properties of nonmetals than of metals; the most abundant element in the universe |
| actinides | are radioactive |
| lanthanides | part of period 6, metals, shiny and reactive |
| bromine | the element that's most reactive with potassium |
| sodium | the element thats most reactive with oxygen |
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