| A | B |
|---|
| data | pieces of information |
| to infer | to make a guess based on observations |
| heliocentric | means the sun is at the center of our solar system |
| system | a group of parts that work together to do a job or produce a result |
| function | its job or role within a system |
| input | object, material or idea that enters the system |
| process | something that happens in the system that changes part of it |
| output | what a system produces |
| closed-loop system | a system in which materials and energy cannot escape |
| open-loop system | system in which materials or energy can leave and enter |
| interdependent | the parts rely on each other |
| a ratio | shows the relationship between 2 quantities |
| percent | means "per hundred" |
| physical pattern | objects or shapes that repeat in a certain way |
| ion | an atom that has gained or lost electrons |
| crystals | solid substances with a repeating pattern of atoms or ions |
| truss | straight beams shaped like a triangle used in construction |
| temporal pattern | an event or process that repeats on a regular basis, like the tides |
| model | anything that represents an idea, object, system or process |
| assumptions | conditions the scientist decides are correct in order to make a model simpler |
| a telescope | used to make far away objects appear closer |
| a microscope | used to magnify small objects |
| hydraulic lift | a tool for lifting heav loads |
| pipettes | tools for measuring small amounts of a liquid |
| micrometer | tool for measuring the exact width of a small object |
| anemometer | tool for measuring wind speed |
| barometer | tool for measuring air pressure |
| calibrations on a tool | marks showing how many units |
| a control group | group that doesn't receive any experiments |
| experimental group | the group that scientists change something for |
| "therm" | means "heat" |
| "hygro" | means "moisture" |
| "Meter" | means "measure" |
| trial | one round of an experiment |
| technology | scientific knowledge applied to human purposes |
| nuclear fission | splitting of a nucleus of an atom |
| radioactive waste | a harmful waste product made by nuclear fission reactions |
| nuclear fusion | the joining of pieces of atoms in the nucleus |
| friction | a force that acts between 2 objects that are touching each other |
