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KLS General Review 1
| Question | Answer |
|---|---|
| quantitative observation | observations that deal with descriptions that can be expressed as numbers |
| qualitative observation | obsevations that deal with descriptions that cannot be expressed as a number |
| system | group of parts that work together to carry out a function |
| fact | any observation that has been repeatedly confirmed and accepted as true |
| opinion | a belief or judgment that rests on grounds not adequate to produce complete certainty |
| SI unit of time | second |
| SI unit of length | meter |
| planetesimals | small asteroid like bodies that become the building blocks for planets |
| Hertzsprung-Russell Diagram shows that main sequence stars | stars that increase in brightness as they increase in temperature |
| strength of force of gravity | depends on mass and distance between objects |
| reason for change in scientific theory | new technology or research leads to new evidence that contradicts or proves the theory or law wrong |
| mass | measures the amount of matter in an object, it stays the same everywhere |
| weight | measure of the force of gravity on an object and will change as the pull of gravity changes |
| independent variable | the variable that is changed by the person doing the experiment |
| dependent variable | the variable that is changed by the independent variable |
| constant | the variables that are kept the same during an experiment |
| accuracy | the closeness of a measurement to its true value |
| precision | refers to how well experimental data and values agree with each other in multiple tests. |
| physical science | branch of science that includes energy, motion, sound, light, electricity and magnetism |
| earth and space science | branch of science that includes the study of the earth such as meteorology, geology, volcanism and the study of space such as the study of stars and planets. |
| find the mean, median, mode and range for this set of data: 36, 14, 16, 8, 16 | Mean = 18, mode = 16, range = 28, median = 16 |
| color of coolest stars | red |
| color of hottest stars | blue or blue-white |
| outer planets | jupiter, saturn, uranus, neptune; larger than inner planets, have many moons, made of gases like hydrogen and helium |
| inner planets | mercury, venus, earth, mars; smaller than outer planets, made of rock and metal, few or no moons |
| inferring | interpreting observations based on reasoning from what you already know |
| heliocentric system | sun centered system where the earth and the planets revolve around the sun |
| geocentric system | earth centered system where all things revolve around the earth |
| what does a star use for fuel? | hydrogen |
| what process does a star use to create its energy? | fusion where atoms, usually hydrogen, are bond together to form a new atom and release a lot of energy |
| When is a star born or begun? | When it begins to use fusion to create its energy |
| parallax | apparent movement of a star when seen from a different position |
| why do scientists use a model of the earth? | because the earth is too big to study directly |
| why do scientists use models of something very small like an atom or a cell? | they are too small to study directly |
| scientific law | statement that describes what scientists expect to happen every time under a particular set of conditions |
| scientific theory | summarizes a hypothesis or group of hypotheses that have been supported with repeated testing; usually tries to expalin why |
| phases of moon | different shapes of the moon seen from earth |
| where nuclear fusion occurs in sun | sun's core |
| estimate | what scientists depend on when they cannot get or obtain exact numbers |
| accretion | gradual gathering together of smaller pieces by gravity in order to form planets, stars, moons, etc |
| solar wind | stream of electrically charged particles that extend outward from the sun's corona |
| model of earth | globe |
| what factors keep earth in orbit | inertia and gravity |
| hypothesis | educated guess, based on observation and research that can be tested |
| star | giant ball of hot gases that undergoes nuclear fusion |
| water on moon | found near the poles |
| line graph | shows how the responding variable changes in response to the manipulated variable |
| why scientists use models | to study objects like atoms and cells that are too small to study |
| scientific questions being investigated today | span different fields of science |
| scientific inquiry | process science uses to find naswers to questions such as what causes the tides and why does the earth rotate |
| where solar wind extend out form | sun's corona |
| Moon's surface features | marias created by lava flows |
| scientists background | come from all kinds of backgrounds |
| factors that keep earth in orbit | earth's inertia (movement) and the sun's gravity |
Created by:
coachkls
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