Science 8 Flashcards
(20 cards)
Function
purpose or task
Design
the look and functioning of the building or object before its made
Robotnik
A manual worker. Someone who does heavy working with little skill
Zeppelins
a rigid airship consisting of a cylindrical trussed and covered frame supported by internal gas cells
mechanical advantage
Amount by which a machine can multiply a force; calculated by dividing the output force by the input force
Input Force
Force applied to operate a machine
Output force
force a machine applies to an object
Force ratio
A comparison of the forces applied between two opposing sides
Speed
How fast something is going
Speed Ratio
measure of how the speed of the object is affected by a machine; calculated by dividing the input distance by the output distance
Ideal Mechanical Advantage
The mechanical advantage of a perfect machine with no loss of useful work caused by friction between moving parts
Input Distance
The input force that is exerted over a distance
Output distance
The output force that is exerted over a distance
Friction
force that opposes motion
Portable Water
Water that is safe for humans to drink
Salinity
Amount of dissolved salt in water
Water Quality
Measure the amount of substances besides water in a water sample; description on how pure a water sample is
Hard water
water containing high concentration on calcium and magnesium
Distillation
technique for separating solutions that involve boiling and condensation
Reverse osmosis
movement of water through a membrane from an area of lower water concentration to one of higher water concentration; technique used from purifying water
