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Alexis Exam 12/16/09
Alexis Exam December 2009
| Question | Answer |
|---|---|
| what is science? | a way and a process used to investigate what is happening around you |
| how did early science try to explain things? | observations |
| what did early scientist use to make their discoveries? | their senses(taste,smell,touch,taste,and hearing) |
| numbers can be used for what? | to describe observations |
| what tools use numbers to give descripitons? | thermometers and meter stick |
| how was cholera discovered? | they found it in food and water |
| what is e.coli? | a type of bacterium |
| what are some ways to reduce your chances of coming in contact with disease causing organism? | antibacterial soups and cleaners |
| what did people do in 1871 to find the source of the cholera epidemic? | they followed clues to track the epidemic |
| what do scientist use to predict what will occur in investigations? | prior experience |
| why do scientist form theories? | when their predictions have been well tested |
| a theory is supported by what? | facts |
| what do scientific laws describe? | a pattern in nature |
| what is one modern tool that scientist use to find and analyze data? | computer |
| what is an application of science to make productions or tools that people can use? | technology |
| what do scientist and doctors use today,like those used in the late 1800's? | the skills of observing,classifying,and interpreting data |
| what 3 skills do scientist use that you also can use when doing a scientific experiment? | observing, measuring, and comparing |
| what do scientist do with their finding? | their observations,experiments,and investigations are shared with others |
| how do scientist report their findings? | they are reported in one of thousands of scientific journals or magazines that are published each year |
| what do scientist spend a large amount of their time doing? | reading journal artilles |
| how do scientist sometimes discover information that might lead to new experiments? | by reading journal articles |
| what is another method that scientist use to communicate scientific data and results? | by keeping a scientific journals |
| how can observations and plans for investigations be recorded? | by using a step-by-step procedure that were followed |
| how should your data be summarized? | in forms of tables, charts, or graphs,they can also be recorded in paragraphs |
| why do scientist use tools, such as thermometers and meter sticks, when they make observations? | to give descriptions using numbers |
| what are some sources for information about problems that you need to solve? | scientific journals |
| what are some skills used in science? | observing, classifying & interpreting data |
| how is technology different from science? | technology is the application of science to make products or tools that people use |
| why is a science journal used to record data? | it allows scientist to share their findings with others, or scientist |
| what are 3 diffrent ways you can summarize or record data in your science journal? | by using tables, charts, or graphs |
| list science skills and the steps to solve a problem | recognize the problem,form a hypothesis,test your hypothesis,analyze data,draw conclusions |
| why would scientists conduct experiments? | to make sure your data is correct |
| how do you reduce bias in an experiment? | to use careful and numerical measurements |
| list the units in the international system of units. what is the SI in multiples of? | KHDMDCM and in multiples of ten |
| know the units used to measure volume, length, area, and mass | milliliter, cm2 and cubic center meter |
| what is density? is it a physical or a chemical porperty? | mass times volume a physical property |
| on earth, water is found naturally in what states? | solid, liquid,and gas |
| how can the states of matter change? | boiling points and freezing points |
| what is the boiling point of a substance? | when the temperature changes a substance into gas |
| what subatomic particles is involved in bonding? | electrons |
| know the changes of the subatomic particles in an atom? | negative, positive,and neutral charges |
| properties you can observe without changing a substance into a new substance are what? | physical properties |
| Way to describe the world with numbers-for example, length, volume, mass, weight, and temperature. | Measurement |
| method of making an educated guess at a measurement | Estimation |
| International System of Unites, related by multiples of ten, that allows qualities to be measured in the exact same way through out the world. | SI |
| Amount of matter in an object which is measured in kilograms. | Mass |
| SI unit for mass | Kilogram |
| Si unit for temperature | Kelvin |
| Amount of change of one measurement in a given time | Rate |
| Displays information in rows and columns, making it easier to read and understand | Table |
| Used to collect, organize, and summarize data in a visual way. | Graph |
| A type of graph used to show the relationship between two variables that are numbered on an x-axis abd a y-axis. | line graph |
| a large type of graph that uses bars of varying sizes to show the relationship between variables | Bar graph |
| a type of graph that shows the parts of a whole; sometimes called a pie graph, each piece represents a percentage of the total. | Circle graph |
| what is the basic unit of matter? | atom |
| Properties of matter that do no change a substance into a new substance are what type of properties? | physical |
| anything that has mass and takes up space, matter's properties are determined by the structure of its atoms and how they are joined. | matter |
| tiny building blocks of matter, made up of protons, | atom |
| substance that contains only one type of atom that cannot be broken down by normal chemical or physical means-for example, oxygen, aluminum, and iron. | Element |
| negatively charged particles that move around the nucleus of an atom and form an electron cloud. | electron |
| positively charged particle that is located in the nucleus of an atom | proton |
| particle without ab electrical charge that is located in the nucleus of an atom | neutron |
| the number of protons in an atom | atomic number |
| the number of protons plus the number of neutrons in an atom | mass number |
| atoms of the same elements that have different number neutrons | isotope |
| matter that is made up of two or more elements and has a physical and chemical properties different from each of the elements that make it up. | compound |
| electrically charged atom whose charge results from at atom losing or gaining electrons. | ion |
| a combination of substances in which the individual substances do not change or combine chemically but instead retain their own individual properties; can gases, solids, liquids, or any combination of them. | mixture |
| mixtures which are not mixed evenly ad each component retains its own properties. | heterogeneous mixture |
| mixtures which are evenly mixed throughout | homogeneous mixture |
| a kind of mixture in which one substance is completely and evenly mixed in another substance and is the same throughout | solution |
| a physical property of matter that can be determined by dividing the mass of an object by its volume. | density |
Created by:
marcrobertdillon
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