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Psci Midterms
Stack #58139
| Question | Answer |
|---|---|
| the prediction of results of a scientific prediction (based on primarily background research) | hypothesis |
| the variable that is manipulated, the one thing that is different in an experiment | Independent Variable |
| The variable that is measured in an experiment | Dependent Variable |
| (set up to give us something to compare the experimental group to) the “normal” group | control group |
| contains the independent variable | Experimental group |
| A decision or judgment made that states whether or not your data supports your hypothesis. | conclusion |
| things in an experiment that should all be the same to ensure accuracy | constants |
| a test of the hypothesis | experiment |
| what are two things an experiment should contian | Control group and an experimental group |
| A group of high school students who follow a specific exercise routine are compared with students who do their normal activities. Name the control group and the experimental group. | Control - do normal activities. Experimantal - do specified activities |
| the amount of space an object takes up. | volume |
| the amount of matter in an object | mass |
| the measurement of how closely packed matter is in an object | density |
| the amount of energy in an object | temp. |
| the metric unit used for mass | gram |
| the metric unit used for volume | liter |
| the metric unit used for distance | meter |
| review the lab tools | in psci folder |
| practice dimentional anayisys | in psci folder |
| know appropriate units for everydat objects | in psci foleder |
| the force of attraction on all objects in the universe | Gravity |
| the smallest particle of an element that still has the properties of that element. | Atom |
| a mixture that has solid particles but they stay suspended and don’t settle out over time: jello, mayo, whipped cream, egg whites. | Colloid mixture |
| a micture made up of two different materials | Hetorgeneous mixture |
| a type of mixture made up of the same material | Homogeneous mixture |
| negatively charged subatomic particles that are located outside the nucleus of an atom. These are the only subatomic particle involved in bonding. | Electron |
| particals far apart | low Density |
| particals close together | high density |
| formula for density | d=m/v |
| a single substance made up of only one atom | element |
| a mixture that settles out over time. Solute particles are very large. Ex. Italian dressing. | suspension |
| particles that are smaller than an atom - protons, neutrons and electrons | subatomic particles |
| the state of matter where it's particles are packed closely together and vibrateing. | solid |
| levels around the nucleus that contain the electrons. | energy level |
| how many electrons can be in each level | 1- 2, 2 - 8, 3 - 18(stable at 8) |
| the chemical bonding of two or more different elements creates this | compound |
| a type of mixture like cool aid, no separation is visible and all particles are same size and evenly distributed. | solution |
| a subatomic particle that is found in the nucleus and has a neutral charge. It contributes to the atomic mass | neutron |
| a state of matter where the particles are close togerher but flowing over eachother | Liquids |
| an atom of an element | molecule |
| an unpure combination, just mixed, doesn't go through a chemical reaction | Mixture |
| a mixture of two or more of the same element | Homogeneous mixture |
| a subatomic particle with a positive charge found in the nucleus | Proton |
| the state of matter where the particles are far apart and moveing quickly | Gas |
| the state of matter where the particles very apart, electrons torn of the nucli and zipping around in space | Plasma |
| what are the differences between weight and mass | weight is the measurement of the pull of gravity on an object and mass the the amound of matter in an object |
| beable to distinguish mixtures and compounds | in notes |
| practice finding density | in notes |
| compare and contrast the differences of colloids, suspensions, and solutions. give examples of each | see matter notes |
| be able to identify the historical atom models and order them on a timeline. | see periodic table notes |
| the symbol of an element | chemical symbol |
| the number of protons in an atom. This defines the element | atomic number |
| the weight of an element | atomic mass |
| what is the unit for measureing the mass of an atom? | amu - atomic mass unit |
| a diagram that shows the nucleus, all of the energy levels, and tells the numbers of the electrons in each energy level | Bohr model |
| all the elements to the left of the Zig - Zag line. The are mallieable and ductile, good conductors of heat and electricity. | metals |
| every element touching the Zig - Zag line. not mallieable or ductile, bad conductors of heat and energy. | non metals |
| all the elements touchting the zig - zag line except aluminum. They are a mixture of the properties of metals and non metals | metalloids |
| the group of elements that form bright colord compounds. They have 1-3 valence electrons and +1 - +3 oxidation number | transition metals |
| the top bar underneath the larger part of the PT | Lanthanides |
| the bottom bar on the PT. It contains mostly manmade elemets. | Actinides |
| what are inner transitional elements | find out what this is from mrs. harper |
| the group that contains elements in all phases - solid, liquid, and gas. It has 7 valence electrons | Halogens |
| the group that contains only non reactive elements - it has full outer erergy level. oxidation # 0 | Noble Gasses |
| extreemly reactive group of elements that are never found uncombined in nature | Alkali metals |
| reactive elements found in the 2nd column. never found uncombinded in nature | Alkali earth metals |
| be able to locate each group on the chart and give basic info | see pt and notes |
| know how to use periodic table and make atom models | see notes and PT |
| the combining of different elements in various proportions to form new substances. | chemical bonding |
| electrons in the outermost energy level the only electrons involvein in bonding | valance electrons |
| : the resulting charge on an atom once after losing or gaining electrons in an attempt to become stable. | oxidation number |
| Electrons are transferred and ions attract each other. Between metals and non metals - electrons are "stolen" | ionic bonding |
| charged particles (atoms that have gained or lost particles | ion |
| bonding where electrons are shared. only between metals | covalent bonding |
| crystal lattice | crystal lattice find out what it is |
| a compound with an overall charge. | polyatomic ion |
| subscript | dito |
| know how to write chemical formulas | check practice sheets |
| know how to find valence electrons and oxidation numbers | found on PT |
| how do you know what type of bond is involved with a compound? | look at each atom - ionic - metals and non metals, covalent - metals. metalloid-? |
| how do you find out how many atoms are in a compound by looking at it's formula? | look at the subscripts, each element without a subscript counts as one atom of that element. |
Created by:
swimergrl10
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